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... The Sakarya River Basin (SRB) contains one of the most important agricultural areas for Turkey. Here, we use a network of 18 tree-ring chronologies and present a reconstruction of the mean June–July Kocasu River discharge, one of the main channels in the SRB, during the period 1803–2002 CE, and place the short period of instrumental flows (since 1953 CE) into historical context. Over the past two ...
... A distributed hydrological model, YHyM, was integrated with the export coefficient concept and applied to simulate the nutrient load in the Mekong River Basin. In the validation period (1992-1999), Nash-Sutcliffe efficiency was 76.4% for discharge, 65.9% for total nitrogen, and 45.3% for total phosphorus at Khong Chiam. Using the model, scenario analysis was then performed for the 2020s taking int ...
Internet; agricultural land; case studies; decision making; forests; land cover; land use planning; landscapes; local government; natural resources conservation; nonprofit corporations; outreach; remote sensing; researchers; riparian areas; watersheds; Connecticut
Abstract:
... Remotely sensed land cover data can be a tremendous resource to land use decision makers, yet there is often a disconnect between the worlds of remote sensing and local government. The Connecticut’s Changing Landscape project is focused on bridging this gap. The project analyzes changes to the state’s landscape using Landsat-derived 30-m land cover and cross-correlation analysis. It includes seven ...
Landsat; Universal Soil Loss Equation; agricultural land; agroecology; databases; economic feasibility; erosion control; kriging; reforestation; rice; soil erosion; sustainable land management; topographic maps; watersheds; Indonesia
Abstract:
... Estimation of soil erosion 3D (E3D) provides basic information that can help manage agricultural areas sustainably, which has not been sufficiently conducted in Indonesia. Sumani watershed is main rice production area in West Sumatra which has experienced environmental problem such as soil erosion and production problem in recent years. 3D Agro-ecological land use planning based on soil erosion 3D ...
... Landscape structure in the Eastern US experienced great changes in the last century with the expansion of forest cover into abandoned agricultural land and the clearing of secondary forest cover for urban development. In this paper, the spatial and temporal patterns of forest cover from 1914 to 2004 in the Gwynns Falls watershed in Baltimore, Maryland were quantified from historic maps and aerial ...
... Wetland habitat continues to be lost in many watersheds across Canada and new program tools are needed to help restore drained wetlands. We used a reverse auction to restore drained wetlands in the Assiniboine River Watershed (ARW) of east-central Saskatchewan which is an important target area for wetland restoration in the North American Waterfowl Management Plan (NAWMP). The reverse auction form ...
AGNPS model; agricultural land; case studies; conservation practices; geographic information systems; gully erosion; pollution; sediment yield; sediments; user interface; watersheds
Abstract:
... AnnAGNPS, Compound topographic index, Ephemeral gully, GIS, Cropland erosion. The formation of ephemeral gullies in agricultural fields has been recognized as an important source of sediment contributing to environmental degradation and compromising crop productivity. Methodologies are being developed for assessing gully formation and gully sediment yield. The Annualized Agricultural Non-Point Sou ...
land use change; agricultural land; irrigation; vegetation cover; watersheds; watershed hydrology; land reform; irrigated farming; runoff; China
Abstract:
... Runoff in Haihe River Catchment of China is steadily declining due to climate change and human activity. Determining abrupt changes in runoff could enhance identification of the main driving factors for the sudden changes. In this study, the sequential Mann-Kendall test analysis is used to determine abrupt changes in runoff in eight sub-catchments of Haihe River Catchment, while trend analysis via ...
agricultural land; agricultural management; conservation practices; data collection; digital elevation models; graphs; prediction; ravines; statistics; topography; water; watersheds; Kansas
Abstract:
... Topographic index (TI) models have been widely used to predict trajectories and initiation points of ephemeral gullies (EGs) in agricultural landscapes. Prediction of EGs strongly relies on the selected value of critical TI threshold, and the accuracy depends on topographic features, agricultural management, and datasets of observed EGs. This study statistically evaluated the predictions by TI mod ...
agricultural industry; agricultural land; basins; case studies; climate; climate change; issues and policy; management systems; politics; water; water management; watershed management; watersheds; Greece
Abstract:
... Sustainability in terms of water management implies the study of all interrelated parameters (social, environmental, economic, engineering and political) in a comprehensive way. Although Greece is presented in the international rankings as a water-rich country, it has significant water problems due to its high temporal and spatial distribution of water resources and its unsustainable management pr ...
agricultural land; climate change; climatic factors; crop models; crops; grains; grasslands; harvest date; irrigated farming; land use change; plateaus; reduced tillage; soil; spring; water resources; watersheds
Abstract:
... In several regions of the world, climate change is expected to have severe impacts on agricultural systems. Changes in land management are one way to adapt to future climatic conditions, including land-use changes and local adjustments of agricultural practices. In previous studies, options for adaptation have mostly been explored by testing alternative scenarios. Systematic explorations of land m ...
water pollution; water quality; agricultural land; land use; urban areas; watersheds; total maximum daily load; nonpoint source pollution; soil erosion; erodibility; point source pollution; phosphorus; environmental markets; New Jersey
Abstract:
... Water quality trading is a voluntary economic process that provides an opportunity for dischargers to reduce the costs associated with meeting a discharge limitation. Trading can provide a cost effective solution for point sources (i.e., wastewater treatment plants) to meet strict effluent limitations set in response to total maximum daily loads (TMDLs). A successful trading program often depends ...
Oryza sativa; agricultural land; crop production; decision making; double cropping; environmental quality; farms; food security; household surveys; households; issues and policy; land use; livelihood; rice; sustainable agriculture; watersheds; China
Abstract:
... Ensuring national food security without decreasing environmental quality is essential for China’s agricultural sustainability. This paper proposes an analytical framework that integrates the influence of rural livelihood transitions and the constraint of local resource availability to explore possible approaches for addressing the dual challenges of food security and environmental sustainability. ...
Conservation Reserve Program; agricultural land; attitudes and opinions; cities; conservation practices; farm structure; farmers; land policy; landowners; riparian buffers; water supply; watersheds; New York
Abstract:
... Despite widespread adoption of conservation practices by farmers in the Cannonsville watershed, part of the New York City water supply system, there is considerable resistance to riparian buffer practices of the Conservation Reserve Enhancement Program (CREP). Traditional approaches to promoting CREP adoption, based on the adoption-diffusion model, were not effective in promoting CREP. We surveyed ...
... This study proposes a novel socio-hydrological modeling framework for assessing the performance of complex water resources systems. It employs and integrates agent-based modeling (ABM) and the theory of planned behavior (TPB) into the socio-hydrological modeling framework to account for agents’ behaviors. Due to farmers’ major role in anthropogenic droughts, this paper mainly focuses on farmers’ b ...
... The discharge of agricultural chemicals (i.e., soil-fertilizer nutrients and pesticides) in runoff waters is important from both agronomic and environmental standpoints. Presented here is an overview of our current concepts and approaches employed for describing this discharge, based on studies we have conducted over the past decade. Most of our field testing and validation of concepts regarding c ...
agricultural land; best management practices; cost effectiveness; total maximum daily load; watersheds; Chesapeake Bay
Abstract:
... This study estimates costs to agricultural producers of the Watershed Implementation Plans (WIPs) developed by states in the Chesapeake Bay Watershed to comply with the Chesapeake Bay total maximum daily load (TMDL) and potential cost savings that could be realized by a more efficient selection of agricultural Best Management Practices (BMPs) and spatial targeting of BMP implementation. The cost o ...
... An accurate detection of agricultural fields is often needed for agricultural-related applications, such as subsidies monitoring, field-based crop yield estimation and agricultural statistics extraction. High-resolution space images have become the fundamental source to extract agricultural field boundaries. Manual boundary delineation is not practical. In this study, we present an approach to det ...
agricultural land; agricultural soils; communications technology; drinking water; early warning systems; farm management; farms; groundwater; land use; management information systems; models; monitoring; natural resources conservation; nitrates; nutrient content; risk; soil nutrients; soil sampling; water quality; water table; watersheds; wells
Abstract:
... This review presentsthe methods used to assess soil, pore water and groundwater nutrient levels on farms and agricultural fields. The purpose of this catalog of methods is to provide a basis for evaluating the efficiency of measures for the control of water catchment areas. A Zone monitoring model (ZMM) which is a basis for appropriate monitoring schemes in view of risks for the groundwater coming ...
agricultural land; agricultural landscapes; agricultural management; agroecosystems; climate; fertilizer application; grasslands; land management; land use and land cover maps; livestock; models; nitrates; perennial grasses; phosphorus; rivers; water quality; watersheds; Wisconsin
Abstract:
... Balancing agricultural production with other ecosystem services is a vexing challenge. The Yahara River watershed in southern Wisconsin is a place where tensions among farmers, policymakers, and citizens at-large run high because nutrient loss from the agricultural practices of a few drive the impairment of surface waters for many. Reducing manure and fertilizer application, as well as increasing ...
... Ecosystem deterioration in small lowland agricultural rivers that results from river dredging entails a significant threat to the appropriate ecohydrological conditions of these water bodies, expressed as homogenization of habitats and loss of biodiversity. Our study was aimed at a comparison of abundance and taxonomic structure of bottom-dwelling macroinvertebrates in dredged and non-dredged stre ...
... The plant microbiome represents a crucial pathway for human exposure to environmental antibiotic resistance. However, little information is available regarding the plant associated resistome in human-related environments at a larger scale. Here, by high-throughput quantitative-PCR chip-based array and amplicon sequencing, we characterized antibiotic resistance genes (ARGs) and bacterial communitie ...
agricultural land; biogeochemical cycles; climate change; climate models; conservation buffers; nitrate nitrogen; nitrogen; no-tillage; phosphorus; pollutants; pollution; pollution control; runoff; sediment transport; soil; strip cropping; tile drainage; total phosphorus; water quality; watersheds; Chesapeake Bay; United States
Abstract:
... Agricultural conservation practices (CPs) are commonly implemented to reduce diffuse nutrient pollution. Climate change can complicate the development, implementation, and efficiency of agricultural CPs by altering hydrology, nutrient cycling, and erosion. This research quantifies the impact of climate change on hydrology, nutrient cycling, erosion, and the effectiveness of agricultural CP in the ...
... As part of the solution to reduce the size of the Gulf of Mexico hypoxia, the state of Iowa has created the Iowa Nutrient Reduction Strategy (INRS) to reduce total nitrogen and phosphorous loads by 45% by 2035. A major component of the strategy is implementation of conservation practices to reduce loads of non-point source pollution from agricultural lands. To identify potential locations for cons ...
agricultural land; climate; crops; habitats; invertebrates; land use; models; nutrient content; regression analysis; riparian areas; streams; watersheds; United States
Abstract:
... As part of the USGS study of nutrient enrichment of streams in agricultural regions throughout the United States, about 30 sites within each of eight study areas were selected to capture a gradient of nutrient conditions. The objective was to develop watershed disturbance predictive models for macroinvertebrate and algal metrics at national and three regional landscape scales to obtain a better un ...
Universal Soil Loss Equation; Water Erosion Prediction Project; agricultural land; basins; computer software; soil erosion; time series analysis; unmanned aerial vehicles; watersheds
Abstract:
... Soil erosion models, typically applied at basin and watershed scales, are rarely evaluated at agricultural field scales due to the lack of spatially-distributed time series data. A novel unmanned aerial vehicle (UAV) methodology was used to quantify farm-field soil erosion from nine UAV surveys and structure-from-motion (SfM). Using a semi-distributed approach, we evaluated soil erosion estimates ...
agricultural land; agricultural soils; cities; income; land use change; metropolitan areas; models; soil conservation; urban planning; urbanization; water storage; watersheds; Michigan
Abstract:
... Urbanization onto adjacent farmlands directly reduces the agricultural area available to meet the resource needs of a growing society. Soil conservation is a common objective in urban planning, but little focus has been placed on targeting soil value as a metric for conservation. This study assigns commodity and water storage values to the agricultural soils across all of the watersheds in Michiga ...
agricultural land; cost effectiveness; dairy industry; environmental impact; funding; lakes; land management; phosphorus; pollution; risk; stakeholders; uncertainty; water quality; watersheds; Australia
Abstract:
... A target to reduce phosphorus flows into the Gippsland Lakes in south-eastern Australia by 40% in order to improve water quality has previously been established by stakeholders. This target, like many others worldwide, has been set mostly on the basis of environmental concerns, with limited consideration of issues such as technical feasibility, socio-economic constraints, political factors and ass ...
agricultural land; land use; risk management; floods; farmers; rural areas; case studies; perceptions (cognitive); runoff; agricultural policy; watersheds; floodplains; farm surveys; good agricultural practices; farmers' attitudes; England
Abstract:
... Recent changes in agricultural and flood defence policies create new opportunities for involving rural land use, in particular agriculture, in flood risk management. This paper presents the results of a case study on land management and flooding in the Laver and Skell catchments in North Yorkshire. The perceptions of local stakeholders were explored through interviews with farmers and discussions ...
agricultural land; environmental markets; farmers; farms; lakes; land policy; land use planning; landscapes; nitrogen; pollution; socioeconomics; trade policy; water quality; watersheds; New Zealand
Abstract:
... Managing the effects on water quality of diffuse nitrogen pollution from agriculture is a widespread problem. Cap and Trade is a policy approach which limits nitrogen discharge (the cap) but provides flexibility in land management (using trading of nitrogen). Lake Taupo Nitrogen Trading Programme (LTNTP) in New Zealand is an exemplar case in applying nitrogen discharge limits at both catchment and ...
agricultural land; geographic information systems; gross domestic product; landscapes; remote sensing; rivers; urbanization; watersheds; China
Abstract:
... Resource preservation efforts are increasingly made at ecoregional scale rather than at administrative level. However, the impact of urbanization on agricultural land at ecoregional scale remains poorly understood. This study integrated remote sensing, geographic information systems, landscape metric analysis, and spatial regression, to quantify agricultural landscape pattern changes in response t ...
agricultural land; algorithms; corn; decision making; farmers' attitudes; managers; market prices; models; planning; planting; prediction; semiarid zones; system optimization; uncertainty; vegetables; water allocation; watersheds; wheat; China
Abstract:
... When planning agricultural production, planting area and water allocation are two major subjects faced by decision makers. In this study, a framework integrated Nerlove supply response model (Nerlove model) and interval fuzzy credibility-constraint bi-level programming (IFCBP) model is developed for planning the agricultural production in arid and semi-arid regions. Through Nerlove model, the plan ...
agricultural land; arid lands; arid zones; basins; climate change; decision making; deficit irrigation; hydrologic models; land use; oases; rivers; stakeholders; supply balance; water allocation; water distribution; water supply; watersheds; China
Abstract:
... Efficient reallocation of existing water supply is gaining importance as demand grows and competitions among users intensify. In extremely arid regions, where deficit irrigation needs to be applied, management decisions on agricultural water allocation are often onerous tasks due to the confliction among water users. This paper presents a hydrological modeling approach to assist decision-makers an ...
agricultural land; carbon; carbon sinks; ecology; environment; fertilizers; irrigation water; models; sustainable development; vegetation; water allocation; water footprint; water shortages; watersheds; China
Abstract:
... There is an urgent need for scientific management of agricultural water and land resources to cope with global warming and water shortages. Therefore, a stochastic multi-objective non-linear programming model was established under the society-economy-ecology framework in this study, which is capable of (1) considering the carbon sink function of farmland vegetation and the carbon emissions produce ...
... Nitrogen (N) deposition plays a key role in ecosystem function as one of the major N sources for natural vegetation, particularly in karst agricultural areas with thin soil cover, which drive the karst N fate via rainwater. To understand the seasonal and spatial variation in nitrogen deposition and to identify the major sources of nitrate in wet deposition in a karst agricultural area (Houzhai Cat ...
agricultural land; arable soils; biofuels; ecosystem services; energy costs; energy crops; females; food availability; food crops; fuel production; governance; greenhouse gas emissions; land use; poverty; quantitative analysis; social environment; watersheds
Abstract:
... Agricultural land use in watersheds for food and biofuels production presents several challenges within the Water-Energy-Food (WEF) nexus at the local and global scales. Firstly, high global energy prices may lead to increasing demand for bio-energy crops, thereby intensifying the competition for arable land and water with food crops. There may be potential net welfare benefits from bio-energy dev ...
streams; water pollution; nitrates; chemical concentration; temporal variation; anthropogenic activities; agricultural land; land use; watersheds; basins; Mediterranean region; Spain
Abstract:
... Anthropogenic activities influence past and present nitrate levels recorded in European stream waters, posing a threat to aquatic biota and human beings. Scarce information on temporal trends of nitrate concentration and its causes is available for Mediterranean catchments. This study presents the evolution of nitrate concentrations over 25years in stream waters of the Ebro River Basin (Spain), a ...
agricultural land; ecosystem services; land use; models; nutrient retention; nutrients; pollution load; watersheds; Chesapeake Bay
Abstract:
... There has been great interest in recent decades in “ecosystem services.” One of the services most often mentioned is the retention of nutrients. I construct a simple model of agricultural land use under a regulatory requirement that nutrient loading cannot exceed a fixed ceiling. Farmers decide the quantity of residual nutrients they will generate, how much land they will allocate to production, a ...
agricultural land; forests; geographic information systems; groundwater; groundwater recharge; infiltration rate; land use; models; rivers; runoff; spatial data; urbanization; water shortages; water table; watersheds; Nepal
Abstract:
... Kathmandu Valley, Nepal.The focus of this study is to project future LULC, delineate potential recharge areas, and evaluate encroachment in recharge areas due to future changes in LULC.The consequences of urbanization in Kathmandu Valley (KV) have been observed in various forms such as change in runoff, groundwater recharge, water scarcity, and others. To sustainably utilize groundwater resources ...
Frederieke J. Kroon; Sharon E. Hook; Dean Jones; Suzanne Metcalfe; Brent Henderson; Rachael Smith; Michael St. J. Warne; Ryan D. Turner; Adam McKeown; David A. Westcott
... The Great Barrier Reef (GBR) is chronically exposed to agricultural run-off containing pesticides, many of which are known endocrine disrupting chemicals (EDCs). Here, we measure mRNA transcript abundance of two EDC biomarkers in wild populations of barramundi (Lates calcarifer) and coral trout (Plectropomus leopardus and Plectropomus maculatus). Transcription levels of liver vitellogenin (vtg) di ...
Soil and Water Assessment Tool model; agricultural land; basins; grasslands; groundwater flow; ice; land use change; runoff; simulation models; snow; watersheds; China
Abstract:
... Since the concept of hydrological response units (HRUs) is used widely in hydrological modeling, the land use change scenarios analysis based on HRU may have direct influence on hydrological processes due to its simplified flow routing and HRU spatial distribution. This paper intends to overcome this issue based on a new analysis approach to explain what impacts for the impact of land use/cover ch ...
Chinese cabbage; agricultural land; ammonia; ammonium compounds; carbon; climatic factors; compound fertilizers; correlation; fertilizer application; field experimentation; lakes; land use; nitrogen; organic fertilizers; pH; planting; production technology; rain; soil water; soil water content; sulfur-coated urea; topsoil; urea; vegetable growing; volatilization; watersheds; China
Abstract:
... Ammonia (NH3) volatilization is a major pathway of nitrogen (N) loss from soil-crop systems. As vegetable cultivation is one of the most important agricultural land uses worldwide, a deeper understanding of NH3 volatilization is necessary in vegetable production systems. We therefore conducted a 3-year (2010–2012) field experiment to characterize NH3 volatilization and evaluate the effect of diffe ...
... Ammonium nitrogen (NH₄⁺-N), which naturally arises from the decomposition of organic substances through ammonification, has a tremendous influence on local water quality. Therefore, it is vital for water quality protection to assess the amount, sources, and streamflow transport of NH₄⁺-N. SPAtially Referenced Regressions on Watershed attributes (SPARROW), which is a hybrid empirical and mechanisti ...
... Estimation of drought in a certain temporal and spatial scale is crucial in climate change studies. The current study targets on three agricultural areas widespread in Greece, Ardas River Basin in Northeastern Greece, Sperchios River Basin in Central Greece, and Geropotamos River Basin in Crete Island in South Greece that are characterized by diverse climates as they are located in various regions ...
agricultural land; animal husbandry; food crops; statistics; watersheds; Indonesia
Abstract:
... Analysis of carrying capacity of agricultural land for food crops is very important to do to determine the extent of the ability of agricultural land in supporting the fulfillment of the food needs of the population in an area. One problem in the Cibaliung watershed is the low ability of land to meet food needs so that residents cannot meet their needs independently. This study aims to determine t ...
agricultural land; irrigation; irrigation water; models; prediction; prices; seepage; water conservation; watersheds; China
Abstract:
... The factors influencing the effective utilization coefficient of irrigation water are not understood well. It is usually considered that this coefficient is lower in areas with large-scale irrigation. With this background, we analyzed the effective utilization coefficient of irrigation water using the analytic hierarchy process using data from 2014 to 2019 in Shihezi City, Xinjiang. The weights of ...
agricultural development; agricultural land; basins; case studies; databases; ecosystems; forests; gardens; habitat fragmentation; humans; lakes; land use; landscapes; population growth; principal component analysis; socioeconomic development; watersheds; wetlands
Abstract:
... In order to explore the landscape pattern evolution and driving forces of the Yilong Lake watershed, the combined method of supervised classification with manual visual interpretation based on the landsat5TM/8OLI remote sensing image data sources was used to establish a high-precision spatial distribution information database of the Yilong Lake watershed. Landscape index was used to analyze the di ...
agricultural land; breeding; fish; land use; laws and regulations; monitoring; ponds; risk; sediments; soil; surface water; watersheds
Abstract:
... The text of this contribution provides a comprehensive summary of the issue of sedimentation. In the descriptive part of the paper, the issue of pond sedimentation is analyzed from both the quantitative and the qualitative point of view. The experimental part is subsequently focused on the quality of pond sediment. Detailed attention is given to land use and the quality of soil on adjacent agricul ...
agricultural land; humans; land use change; pollution; research; runoff; t-test; urbanization; watersheds
Abstract:
... This article aims to evaluate the impact of urbanization on land use changes and the effects of land use changes on catchment’s runoff. The maximum likelihood method was used to interpret the seven remote sensing images of the Puhe River Basin from 1985 to 2015. The Mann-Kendall test, sliding T test, and double accumulation method are adopted to analyze the impact of land use changes on watershed ...
Landsat; agricultural land; basins; deforestation; flood control; floods; geographic information systems; land use change; models; reforestation; remote sensing; rivers; urban areas; urbanization; watersheds; Kenya
Abstract:
... This paper investigates the impacts of land use changes on river peak discharges during floods and its contribution to flood occurrence in the Sosiani River basin in the Rift Valley province of Kenya. The land use maps used in the study were derived from the Landsat imagery employing remote sensing and GIS techniques. Two-dimensional Rainfall–Runoff–Inundation (RRI) model was utilized in simulatin ...
Landsat; agricultural land; deforestation; ecosystems; forests; grasses; highlands; image analysis; land cover; land use; livestock; shrublands; watersheds; Ethiopia
Abstract:
... Land use/land cover changes (LULCC) at Adei watershed (Ethiopia) over a period of 23 years (1986–2009) has been analysed from LANDSAT imagery and ancillary data. The patterns (magnitude and direction) of LULCC were quantified and the final land use/land cover maps were produced after a supervised classification with appropriate post-processing. Image analysis results revealed that the study area h ...
dissolved organic nitrogen; nutrient content; dissolved inorganic nitrogen; watersheds; seasonal variation; dissolved organic carbon; anthropogenic activities; remote sensing; phosphorus; correlation; lakes; livestock production; fertilizer application; data collection; image analysis; water quality; agricultural land; water management; land cover; irrigation water; rivers; surveys; streams; pollution load; Japan
Abstract:
... Human activities have created high nutrient surpluses in agricultural lands due to the increasing rate of chemical fertilizer application and the increase in livestock production. To analyse the nutrient characteristics and estimate the nutrient load in streams, we conducted extensive field survey and water quality experiments from 2007 to 2008 in Koise River, a major river of the Lake Kasumigaura ...
Panicum virgatum; soil organic carbon; no-tillage; General Circulation Models; agricultural land; conventional tillage; corn; climate change; carbon sequestration; crop yield; watersheds; land use; Corn Belt region
Abstract:
... Land-based carbon sequestration constitutes a major low cost and immediately viable option in climate change mitigation. Using downscaled data from eight atmosphere-ocean general circulation models for a simulation period between 2015 and 2099, we examine the carbon sequestration potential of alternative agricultural land uses in an intensively farmed Corn Belt watershed and the impact of climate ...
Arenosols; Fluvisols; Phaeozems; Solonchaks; agricultural land; agriculture; carbon sequestration; climate change; databases; desertification; environment; grasslands; groundwater; industry; land use change; oases; rivers; soil organic carbon; water table; watersheds; woodlands
Abstract:
... With fast development of industry and agriculture in last two decades, land use changed greatly on specific soil types of intrinsic low quality with C loss potential and necessitates avoiding. Although researchers studied the effect of land-use changes on soil carbon storage, that on some soil types had rarely been reported, which led to relatively more C loss. We explored the impact of land-use c ...
Basidiomycota; Chytridiomycota; Firmicutes; Planctomycetes; agricultural land; chemical oxygen demand; cotton; ecosystems; environment; equations; fungi; land use; landscapes; organic matter; pH; river water; rivers; tensile strength; total nitrogen; water quality; water quality analysis; watersheds; China
Abstract:
... Organic matter decomposition (OMD) is one of the important river ecosystem functions. Changes in land use and landscape pattern (LULP) have a serious influence on the OMD in neighboring river ecosystems. However, there is limited information on the influence paths of LULP on organic matter decomposition in river ecosystems. In this study, cotton strip (CS) as a substitute for investigating OMD, wa ...
... The leaching of nitrogen in farmland could lead to groundwater nitrogen pollution, while precipitation is the driving factor. Nevertheless, the influences of extreme precipitation on soil organic nitrogen leaching, such as urea, is not clear. In this study, we used soil column experimental data to construct a nitrogen migration and transformation model. The constructed model was applied to unsatur ...
agricultural land; crop production; education; environmental impact; farmers; farmers' attitudes; habitat fragmentation; income; irrigation water; land use planning; microclimate; models; oases; spatial data; statistics; surveys; watersheds; China
Abstract:
... Environmental degradation is closely related to unreasonable land use behaviors by farmers. In this study, participatory rural assessment (PRA) is used to conduct a detailed survey of farmers and plots and to collect relevant natural and social statistics. The accuracy of remote sensing data is verified by comparative analysis, and the change in status of various land use types in each research pe ...
agricultural land; available water capacity; environmental factors; expert opinion; geographic information systems; hydraulic conductivity; organic matter; phosphorus; risk assessment; soil surveys; streams; topography; watersheds; Pennsylvania
Abstract:
... Phosphorus (P) site assessment is used nationally and internationally to assess the vulnerability of agricultural fields to P loss and identify high‐risk areas controlling watershed P export. Current efforts to update P site assessment tools must ensure that these tools are representative of the range of conditions to which they will be applied. We sought to identify key parameters available in pu ...
... We compare the geomorphology and soil of two ancient Maya wetland agricultural complexes in modern day Belize. This paper focuses on 3000 years of soil geomorphology and paleoecological change to determine the chronology of wetland formation and human use in this region. We also characterize Maya manipulation of the environment over time, especially considering times of ecological or climactic cha ...
landscape ecology; Mississippi River; total nitrogen; soybeans; social welfare; rivers; research projects; research programs; model validation; landscapes; cropland; crop production; United States Environmental Protection Agency; AGNPS model; watersheds; conservation practices; lakes; runoff; water pollution; simulation models; Zea mays; Glycine max; ecosystem services; agricultural land; corn; spatial data; nonpoint source pollution; crop rotation; wetlands; environmental models; nitrogen; streams; biofuels; pollution load; conservation areas; crops; Illinois
Abstract:
... The Future Midwest Landscape (FML) project is part of the US Environmental Protection Agency (EPA)’s new Ecosystem Services Research Program, undertaken to examine the variety of ways in which landscapes that include crop lands, conservation areas, wetlands, lakes, and streams affect human well-being. The goal of the FML project is to quantify current and future ecosystem services across the regio ...
agricultural land; base flow; basins; climate; land use change; planning; water management; watersheds; Great Plains region; Missouri River; United States
Abstract:
... The Missouri River system has a large water storage capacity, where baseflow plays an important role. Understanding historical baseflow characteristics with respect to climate and land use impacts is essential for effective planning and management of water resources in the Missouri River Basin (MORB). This study evaluated statistical trends in baseflow and precipitation for 99 MORB minimally distu ...
... In this study, the natural radioactivity level of soils and sediments due to the usage of fertilizers, particularly phosphate fertilizers, in agricultural lands of the Büyük Menderes River Basin, Western Turkey, have been determined. A total of 40 soil and sediment samples were collected along the Büyük Menderes River Basin and analyzed for ²³⁸U, ²³²Th, and ⁴⁰K radioisotopes using a high-purity ge ...
temporal variation; land use change; mathematical models; roads; agricultural land; temperate forests; watersheds; streams; data analysis; water temperature; runoff; groundwater; urbanization; hydrologic models; water table; Poland
Abstract:
... The runoff coefficient is one of the fundamental hydrological characteristics of a catchment. It indicates a share of the precipitation water that runs off from the catchment.The results of the runoff coefficient calculation based on measurements carried out continuously in the Cerhovický Stream catchment over a considerable period of time, i.e. from 1988 up to 2006 are presented. The precipitatio ...
agricultural land; land cover; models; monitoring; nitrate nitrogen; nitrogen; nutrients; phosphorus; pollution load; prediction; regression analysis; river water; water quality; watersheds; New Zealand
Abstract:
... Spatial regression models were used to predict yields (kg ha⁻¹ yr⁻¹) of nitrogen (N) and phosphorus (P) discharged from catchments throughout New Zealand under natural and current conditions. The models were derived using loads (kg yr⁻¹) of TN, NO₃-N, TP and DRP calculated for 592 river water quality monitoring sites. Anthropogenic increases in yields above natural levels were associated with the ...
agricultural land; animal manures; atmospheric deposition; case studies; crop yield; deciduous forests; farmers; fertilizers; floods; groundwater; land use planning; nitrates; nitrogen; nitrogen content; nutrient content; pollution; residential areas; rivers; soil; streams; surface water; terrestrial ecosystems; water management; water quality; watersheds; Italy
Abstract:
... In a catchmnent, nitrogen (N) export from terrestrial ecosystems to rivers is controlled by the hydrological processes and N balance. In the present paper, the soil system N budget and riverine export were quantified in a Mediterranean watershed, the Celone (South-East, Italy). The study area (72km2) consists of agricultural land (70%) and deciduous forests with three small residential areas. Majo ...
Landsat; Universal Soil Loss Equation; agricultural land; case studies; gully erosion; land degradation; land use; remote sensing; rivers; texture; watersheds; Philippines
Abstract:
... This paper introduces two case studies of mapping hazardous state of land degradation appeared widely in Southeast Asian countries. One was a case for Keduang watershed in the upper stream of Wonogiri River in Central Java, Indonesia. The author developed a method to obtain 2.5 meters resolution landuse data by combination of Landsat/TM/ETM+ and ALOS/PRISM/AVNIR2 pan-sharpened data, which showed o ...
agricultural land; clay soils; computer software; digital elevation models; drainage; geographic information systems; laboratory experimentation; lakes; microrelief; rain; rainfall simulation; roughness; runoff; soil water; surface roughness; water erosion; watersheds
Abstract:
... In the study we evaluated spatial and quantitative changes in soil surface microtopography to describe water erosion process under simulated rain with use of a non-contact optical 3D scanner. The experiment was conducted in two variants: with and without drainage layer. Two clay soils collected from farmlands from the catchment of lake Zgorzała (Warsaw) were investigated. Six tests of simulated ra ...
agricultural land; anthropogenic activities; case studies; global positioning systems; land cover; landscapes; remote sensing; urban areas; watersheds; woodlands; China
Abstract:
... The interaction between human activity and landscape pattern has been a hot research topic during the last few decades. However, scholars used to measure human activity by social, economic and humanistic indexes. These indexes cannot directly reflect human activity and are not suitable for fine-grained analysis due to the coarse spatial resolution. In view of the above problems, this paper propose ...
agricultural land; geographic information systems; irrigated farming; land classification; land evaluation; land use; map overlay; multi-criteria decision making; rainfed farming; remote sensing; watersheds; Iran
Abstract:
... The present study was carried out to evaluate agricultural capability of a watershed located in Khuzestan; a province in southern Iran. It is aimed to examine the applicability of Multi Criteria Decision-Making (MCDM) methods in site selection process. Accordingly, the ecological resources of the watershed were initially identified. To specify the criteria required for agricultural land evaluation ...
agricultural land; ammonium nitrogen; computer software; data collection; electrical conductivity; groundwater; groundwater contamination; hydrologic models; irrigation; isotopes; monitoring; nitrate nitrogen; nitrates; nitrogen; rivers; soil permeability; summer; total nitrogen; total suspended solids; water quality; water table; watersheds; winter; Italy
Abstract:
... Water quality modeling is increasingly recognized as a useful tool for obtaining valuable information for optimal water quality management. In this study, the free software QUAL2Kw was used to evaluate the impacts of agricultural nitrogen (N) excess on river nitrate (NO₃-N) concentrations. We explored the possibility to use QUAL2Kw in order to back calculate the exchange of water and N from the gr ...
Revised Universal Soil Loss Equation; aesthetics; agricultural land; basins; digital elevation models; drinking water; erosion control; geographic information systems; land degradation; land productivity; land use planning; landscapes; meteorological data; rain gauges; soil erosion; soil map; watersheds; Sri Lanka
Abstract:
... Soil erosion is one of the main forms of land degradation. Erosion contributes to loss of agricultural land productivity and ecological and esthetic values of natural environment, and it impairs the production of safe drinking water and hydroenergy production. Thus, assessment of soil erosion and identifying the lands more prone to erosion are vital for erosion management process. Revised Universa ...
agricultural land; chlorophyll; decision making; decision support systems; eutrophication; fertilizers; groundwater; irrigation; lakes; land use change; nitrogen content; nutrients; pesticides; phosphorus; pollution load; rivers; simulation models; tourism; trophic relationships; water quality; watersheds; New Zealand
Abstract:
... While expansion of agricultural land area and intensification of agricultural practices through irrigation and fertilizer use can bring many benefits to communities, intensifying land use also causes more contaminants, such as nutrients and pesticides, to enter rivers, lakes, and groundwater. For lakes such as Benmore in the Waitaki catchment, South Island, New Zealand, an area which is currently ...
water pollution; Monte Carlo method; simulation models; rivers; water quality; agricultural land; equations; computer analysis; watersheds; streams; nonpoint source pollution; runoff; dissolved oxygen
Abstract:
... To achieve effective environmental control, it is important to develop methodologies for dealing with uncertainties in model simulation of pollution behaviour and effects. Several procedures have been proposed to quantify uncertainties in modelling studies. This paper utilizes the two methods that are widely applied, i.e. functional analysis and Monte Carlo Simulation. The first-order part of the ...
... Growingly scarce ecologically viable flood plain wetland of the Punarbhaba river basin is further endangered due to flow modification through Komardanga dam. This work intends to discover physical vulnerability of the wetlands in Punarbhaba river basin of Indo-Bangladesh considering seven conditioning parameters, e.g., water presence frequency (WPF) map, flood inundation map, frequency of pixel be ...
... Avoided ecological loss is an appropriate measure of conservation effectiveness, but challenging to measure because it requires consideration of counterfactual conditions. Land-use simulation is a well suited but underutilized tool in this regard. As a case study for the application of land-use simulation to assess the impact of protected areas, we present a scenario analysis exploring conservatio ...
... Chinese Loess Plateau is considered as one of the most serious soil loss regions in the world, its annual sediment output accounts for 90 % of the total sediment loads of the Yellow River, and most of the Loess Plateau has a very typical characteristic of “soil and water flow together”, and water flow in this area performs with a high sand content. Serious soil loss results in nitrogen and phospho ...
... Scale difference between in situ and remotely sensed soil moisture observations and model grid size has been an issue for validation of remote sensing data, soil moisture data assimilation and calibration of hydrologic models. This study aims to link two different scales of soil moisture estimates by upscaling single point measurements to field averages for representing field-scale agricultural ar ...
agricultural land; agriculture; aquatic plants; area; chemical oxygen demand; degradation; drainage water; ecosystems; environment; eutrophication; flow; nonpoint source pollution; pollution control; rice; river water; rivers; rural areas; slow-release fertilizers; total nitrogen; total phosphorus; water quality; watersheds; wheat; China; Yangtze River
Abstract:
... Non-point pollution is becoming one of the main causes of the degradation of rural environment in China. A systematic strategy encompassing source reduction, process retention, nutrient reuse, and water restoration for controlling agricultural non-point source pollution was applied to a 1.5 km² intensive rice-wheat rotation area at Yaoqiao county, Zhenjiang city, Jiangsu Province, in the downstrea ...
agricultural land; arid lands; autocorrelation; basins; ecosystems; grasslands; land use change; models; rivers; water supply; water yield; watersheds; Yellow River
Abstract:
... With realizing the importance of ecosystem services to society, the efforts to evaluate the ecosystem services have increased. As the largest tributary of the Yellow River, the Weihe River has been endowed with many ecological service functions. Among which, water yield can be a measure of local availability of water and an index for evaluating the conservation function of the region. This study a ...
Monte Carlo method; agricultural land; analytical methods; environmental management; land use; model uncertainty; models; nitrogen; nutrient management; pollution load; rivers; stream flow; uncertainty analysis; watershed management; watersheds; China
Abstract:
... Models and related analytical methods are critical tools for use in modern watershed management. A modeling approach for quantifying the source apportionment of dissolved nitrogen (DN) and associated tools for examining the sensitivity and uncertainty of the model estimates were assessed for the Sha He River (SHR) watershed in China. The Regional Nutrient Management model (ReNuMa) was used to infe ...
agricultural land; automation; data collection; groundwater; nitrates; pollution; spring; springs (water); streams; summer; surface water; water quality; water table; watersheds; winter
Abstract:
... Examples of the utility of UV optical nitrate sensors are provided for two field applications, investigating nitrate pollution in a lowland, peri-urban catchment. In one application, rapid, in-stream longitudinal nitrate surveys were made in summer and winter, by fixing an optical nitrate sensor operating in continuous measurement mode to a kayak that was paddled along 10 km of the mainstem of the ...
... The loss of fertile soil from agricultural areas in Norway is especially harmful because of the thin layer of nutrient rich soil and the limited space where agriculture is possible. Physically based soil erosion prediction models have proved to be good tools to simulate and quantify soil erosion, but are not well established in Norway yet. Due to that this study was undertaken to further improve t ...
Revised Universal Soil Loss Equation; agricultural land; altitude; climate; eutrophication; meteorological data; nitrogen; planning; politics; rain; regression analysis; risk; rivers; soil; soil erosion; water pollution; watersheds; China; Yangtze River
Abstract:
... In densely populated countries like China, clean water is one of the most challenging issues of prospective politics and environmental planning. Water pollution and eutrophication by excessive input of nitrogen and phosphorous from nonpoint sources is mostly linked to soil erosion from agricultural land. In order to prevent such water pollution by diffuse matter fluxes, knowledge about the extent ...
agricultural land; algae; basins; crops; dry season; food webs; freshwater ecosystems; highlands; hydrochemistry; intensive farming; land use change; mineral fertilizers; nitrates; nitrogen; nutrient availability; nutrient content; phosphorus; pollution load; population density; rare earth elements; rivers; shifting cultivation; watersheds; South East Asia
Abstract:
... As world food demand continues to increase, two broad strategies for agricultural production have been widely discussed: land sparing and land sharing. Reflecting tradeoffs between the extent and intensity of agricultural use, land sparing maximizes the ratio of conserved to agricultural land, whereas land sharing allows more extensive, nature-friendly transformation of the agroecological matrix. ...
Ruppia; agricultural land; eutrophication; land use change; macrophytes; pollution load; risk; salinity; spring; summer; surface water level; surveys; watersheds; New Zealand
Abstract:
... Coastal lagoons are at risk internationally due to impacts associated with human-induced land use change. The resilience of aquatic macrophytes in these systems is threatened by altered hydrological regimes, elevated nutrient loading, and increased dominance of nuisance species. We describe the aquatic plant dynamics of the Waituna Lagoon Ramsar Site, a 1,350 ha lagoon frequently opened to the sea ...
... To meet good chemical and ecological status, Member States are required to monitor priority substances and chemicals identified as substances of concern at European Union and local/river-basin/national level, respectively, in surface water bodies, and to report exceedances of the environmental quality standards (EQSs). Therefore, standards have to be set at national level for river basin specific ...
agricultural land; databases; denitrification; land use; nitrates; nitrogen; phosphates; research; riparian areas; spatial variation; total organic carbon; variance; water; water quality; watersheds; Germany
Abstract:
... Elevated nutrient inputs challenge the health and functioning of aquatic ecosystems. To improve riverine water quality management, it is necessary to understand the underlying biogeochemical and physical processes, anthropogenic drivers and their interactions at catchment scale. We hypothesize that the spatial heterogeneity of nutrient sources dominantly controls the variability of in‐stream conce ...
... Arsenic (As) from various anthropogenic sources has accumulated in estuarine and coastal sediments of China in the past decade, but we know little about the overall situation of As pollution at a national scale. Here, we analysed the spatial-temporal distribution characteristics, source, fate, and potential risks of As from 11 provincial-level regions across coastal China based on reviewed data ex ...
Debapriya Mondal; Romy Periche; Bristin Tineo; Luis A. Bermejo; Mohammad Mahmudur Rahman; Abu Bakkar Siddique; Md Aminur Rahman; José L. Solis; Gerardo J.F. Cruz
... Arsenic (As) exposure from surface and groundwater in Peru is being recognised as a potential threat but there are limited studies on As in the food-chain and none on As in Peruvian rice. In this study, we have determined the As content in rice cultivated in the Tumbes river basin located in the northern province of Peru, an area known for extensive rice cultivation. We collected rice and soil sam ...
Bayesian theory; administrative management; agricultural land; anthropogenic activities; basins; biochemical oxygen demand; chemical oxygen demand; dry season; environment; grasslands; humans; land use; models; riparian areas; sewage; water; water quality; watersheds; wet season
Abstract:
... In order to protect the water environment in seriously polluted basins, the impacts of anthropogenic activities (sewage outfalls and land use) on water quality should be assessed. The Bayesian network (BN) provides a convenient way to model these complex processes. In this study, anthropogenic impacts on chemical oxygen demand (COD) and biochemical oxygen demand (BOD) were evaluated in the Huaihe ...
Soil and Water Assessment Tool model; agricultural land; anthropogenic activities; basins; climate; climate change; ecosystems; forests; land use; land use and land cover maps; model validation; reforestation; shrublands; stream flow; water resources; watersheds; Spain
Abstract:
... Climate change and the land-use and land-cover changes (LULC) resulting from anthropic activity are important factors in the degradation of an ecosystem and in the availability of a basin’s water resources. To know how these activities affect the quantity of the water resources of basins, such as the Segura River Basin, is of vital importance. In this work, the Soil and Water Assessment Tool ...
agricultural land; autocorrelation; earthquakes; forests; grasslands; landscapes; landslides; multivariate analysis; rain; space and time; spatial data; typhoons; watersheds; Taiwan
Abstract:
... The Chi-Chi earthquake (ML = 7.3) occurred in the central part of Taiwan on September 21, 1999. After the earthquake, typhoons Xangsane and Toraji produced heavy rainfall that fell across the eastern and central parts of Taiwan on November 2000 and July 2001. This study uses remote sensing data, landscape metrics, multivariate statistical analysis, and spatial autocorrelation to assess how earthqu ...
agricultural land; carbon sinks; ecosystem services; environmental impact; forests; geographic information systems; habitats; humans; issues and policy; land use change; models; rubber; sediments; water yield; watersheds; Thailand
Abstract:
... Ecosystem services are highly vulnerable to a number of impacts due to the complex effects of human use of natural resources and subsequent land use change. Assessment of the impact of change in land use with respect to ecosystem services is necessary in order to implement appropriate land uses that enhance ecosystem services. This study analysed the impact of change in land use on ecosystem servi ...
agricultural land; environmental assessment; humans; issues and policy; landscapes; planning; residential housing; risk; urbanization; watersheds; China
Abstract:
... Choosing a suitable low-risk location by multi-criteria methods is commonly accepted in landscape planning. However, the low risk place demonstrated on spatial patterns may not completely satisfy the urbanization requirement. In this article, we consider that except for avoiding the risks by site selection on the map, risk adaptation methods should be adopted at landscape scale. Eight ecological r ...
... Farm nutrient budgets related to 1994 were calculated for seven farm types, accounting for approximately 90% of the agricultural land in the River Ythan catchment, NE Scotland. The magnitude of fluxes of nitrogen (N) and phosphorus (P) at the catchment scale in relation to these farm types was also assessed. Positive budgets were calculated for all farm types, with the largest surpluses estimated ...
... Erodibility of Swedish clay soils estimated according to the existing methods is usually low, but high levels of suspended solids and attached unreactive phosphorus have been recorded in drainage water from fields and catchments dominated by clay soils. Inherent susceptibility to soil erosion is usually assessed through aggregate stability studies or dispersion tests. The latter are simple to perf ...
Landsat; agricultural land; geographic information systems; land cover; land use; models; principal component analysis; remote sensing; urban planning; urbanization; watersheds; India
Abstract:
... The present study aims to assess the spatio-temporal growth of urban sub-centre of North 24 Parganas District of West Bengal, India during 1989–2016. Landsat TM and Landsat 8 OLI satellite data for 1989, 2006 and 2016 along with Shannon’s entropy model and Principal component analysis were used to assess the spatial dispersion and consistency of urbanization. A concentric zone analysis was also ap ...
Ana Clecia Campos Brito; Cácio Luiz Boechat; Antonny Francisco Sampaio de Sena; Lizandra de Sousa Luz Duarte; Clistenes Williams Araujo do Nascimento; Yuri Jacques Agra Bezerra da Silva; Ygor Jacques Agra Bezerra da Silva; Paloma Cunha Saraiva
agricultural land; agricultural soils; air; cerrado; energy; foods; heavy metals; indigenous species; risk; savannas; soil pollution; topsoil; water; watersheds; Brazil
Abstract:
... The continuous use of agricultural inputs for grain, fiber, and energy production in the Brazilian savannah can increase heavy metal (HM) concentrations in the soils. In this context, we aimed to determine the natural concentrations and establish the quality reference values (QRVs) of HMs in reference soils of a sedimentary watershed under native vegetation in one of the latest agricultural fronti ...
General Circulation Models; agricultural land; autumn; base flow; climate change; hydrologic models; land use; river flow; rivers; runoff; spring; summer; temperature; watershed hydrology; watersheds; winter; Quebec
Abstract:
... s part of a wider study on the adaptation of agricultural land use to climate change (CC), this paper presents an assessment of possible future hydrological regimes of the Chaudière River watershed, Québec, Canada. We first present a review of the various methods used to integrate outputs of General Circulation Models (GCMs) into hydrological models that are applied at a local scale. Following thi ...
... We conducted biophysical simulations using MapShed to determine the effects of adopting best management practices (BMPs) to reduce nutrients and sediment pollution in a watershed dominated by poultry production in the Saline Bayou Watershed, Louisiana, USA. The reduction of three water pollutants, nitrogen, phosphorus, and sediment from adopting different BMPs were assessed using a linear programm ...