An official website of the United States government
Here’s how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
tiledrainage, etc ; administrative management; agricultural management; arable soils; fertilizers; groundwater; lysimeters; nitrogen; pollution; surface water; Show all 10 Subjects
Abstract:
... Leaching of nitrogen from arable land can lead to pollution of groundwater and surface water. Various measures have been implemented in agriculture to reduce leaching, but there is still potential to do more. To find the best agricultural management regime to limit the problem, leaching from soils under different management must be measured. Different methods to estimate leaching are available, bu ...
tiledrainage, etc ; agricultural watersheds; catenas; groundwater; overland flow; runoff; seepage; snowmelt; snowpack; water storage; Norway; Show all 11 Subjects
Abstract:
... A significant overland flow and erosion event was documented and studied in an agricultural area with postglacial marine sediments (southern Norway). Field observations and UAV-photography revealed that a large volume of water abruptly exfiltrated at the end of the snowmelt season. Numerical groundwater modelling aided in interpreting our observations, as well as comparison with prior study in the ...
tiledrainage, etc ; basins; hydrologic models; land use; nutrient transport; rain; runoff; watershed management; Lake Erie; Ohio; Show all 10 Subjects
Abstract:
... Simple models like the curve number method are commonly used to predict runoff volumes from agricultural fields, playing a key role in nutrient transport modeling and watershed management; however, the curve number method has not been evaluated for use in tile-drained fields and it may therefore produce erroneous runoff predictions if applied in these settings. In this study, we evaluate the curve ...
... Basic oxygen furnace (BOF) and blast furnace (BF) steel slags are well suited for phosphorous (P) removal from nonpoint sources such as agricultural runoff. However, the reported mechanism(s) of removal varies from study to study which complicates implementation for unique environmental conditions that may interfere with the removal mechanism(s). This work compared laboratory column experiments an ...
Mariette Vreugdenhil; Borbála Széles; José Luis Salinas; Peter Strauß; Markus Oismueller; Patrick Hogan; Wolfgang Wagner; Juraj Parajka; Günter Blöschl
... Understanding the role of soil moisture and other controls in runoff generation is important for predicting runoff across scales. This paper aims to identify the degree of non‐linearity of the relationship between event peak runoff and potential controls for different runoff generation mechanisms in a small agricultural catchment. The study is set in the 66 ha Hydrological Open Air Laboratory, Aus ...
tiledrainage, etc ; cropland; environmental quality; nitrate nitrogen; nitrates; probability; soil organic matter; watersheds; weather; Corn Belt region; Iowa; Show all 11 Subjects
Abstract:
... In the U.S. Corn Belt, annual croplands are the primary source of nitrate loading to waterways. Long periods of fallow cause most nitrate loss, but there is extreme interannual variability in the magnitude of nitrate loss due to weather. Using mean annual (2001–2018) flow‐weighted nitrate‐N concentration (FWNC; mg NO₃––N L–¹), load (kg NO₃––N), and yield (kg NO₃––N ha–¹ cropland) for 29 watersheds ...
tiledrainage, etc ; adsorption; agroecosystems; corn; lysimeters; mineralization; nitrates; nitrogen; nitrogen fertilizers; soil; soil organic nitrogen; urea; water quality; China; Show all 14 Subjects
Abstract:
... Nitrate (NO₃⁻) leaching in agroecosystems has caused much concern worldwide due to its negative environmental and health impacts. To evaluate the effect of fertilization on NO₃⁻ leaching and soil N accumulation, a two-year ¹⁵N tracing study was conducted in subtropical China with field lysimeters packed with non-destructive sampling red soil. 200 kg N ha⁻¹ yr⁻¹ urea (¹⁵N abundance of 10%) was appl ...
tiledrainage, etc ; automation; drainage; drainage water; groundwater; landscapes; soil water; storms; subsurface flow; water management; water table; watersheds; Ohio; Show all 13 Subjects
Abstract:
... Tile outlet discharge, soil moisture, and groundwater response were monitored for one year from a 10-ha catchment in north-central Ohio to understand the impact of automated drainage water management (ADWM) following 16 storm events. Under ADWM the tile outlet valve was programmed to open and release water when the water level in the control structure reached a user defined set point below the soi ...
tiledrainage, etc ; aluminum; calcium; drainage; drainage water; fertilizers; fractionation; iron; organic matter; pollution; regression analysis; soil water; water management; water quality; Show all 14 Subjects
Abstract:
... Higher than average fertilization rates, as applied to mineral soils, are often recommended for cultivated organic soils (>20% organic matter), which over time, have led to phosphorus (P) pollution into receiving water bodies via subsurface tile drainage. Limited studies have documented the P pools within organic soils or their link to tile drainage water quality. This study quantified the differe ...
tiledrainage, etc ; agroecosystems; cover crops; hydrograph; hysteresis; phosphorus; preferential flow; regression analysis; sediment transport; sediments; subsurface flow; tillage; turbidity; water management; Ohio; Show all 15 Subjects
Abstract:
... Subsurface tile drainage is recognized as a significant source of sediment and particulate phosphorus (PP) in the midwestern U.S. However, the role of subsurface flow pathway and source water connectivity dynamics on sediment transport is poorly understood. The overarching objective of this study was to investigate sediment and PP loading dynamics for a midwestern subsurface tile drained agroecosy ...
... Phosphorus losses from agriculture have long generated concern due to the ecological impact on surface waters. Here tile-drained agricultural catchments are a critical source for concentrating and transporting phosphorus bioavailable forms or dissolved reactive phosphorus (DRP). Hence, edge-of-field technologies have been introduced to reduce DRP loads. Filter systems have received special attenti ...
tiledrainage, etc ; agrochemicals; climate; drainage; electrical conductivity; groundwater; groundwater flow; hydrodynamics; nitrates; soil heterogeneity; subsurface flow; surface water; topography; topsoil; water table; Denmark; Show all 16 Subjects
Abstract:
... In agricultural fields, tile drains represent potential pathways for the migration of solutes, such as nitrates, in groundwater and surface water bodies. Tile drain flow is controlled by the temporal and spatial dynamics of the shallow groundwater table, which results from complex interactions between climate, topography and soil heterogeneity. Studies on the effect of topsoil heterogeneity on sha ...
tiledrainage, etc ; climate; cropland; data collection; drainage water; farm management; infrastructure; landscapes; metadata; nitrate nitrogen; rowcrops; soil; subsurface drainage; vegetation; water quality; North Carolina; Show all 16 Subjects
Abstract:
... This paper describes a multi-site and multi-decadal dataset of artificially drained agricultural fields in seven Midwest states and North Carolina, USA. Thirty-nine research sites provided data on three conservation practices for cropland with subsurface tile drainage: saturated buffers, controlled drainage and drainage water recycling. These practices utilize vegetation and/or infrastructure to m ...
tiledrainage, etc ; agricultural land; agricultural pollution; groundwater; model validation; nitrates; nitrogen; simulation models; soil profiles; subsurface drainage; temporal variation; water flow; water management; winter; France; Show all 15 Subjects
Abstract:
... Agricultural pollution, due to excessive land fertilization, affects the quality of both surface and ground water. This paper presents a conceptual and reservoir-based model that simulates the time variation of nitrate concentrations [NO3⁻] at the outlet of a subsurface drainage network, referred to herein as “NIT-DRAIN.” The model is based on a simplified scheme of water and nitrate transfer proc ...
tiledrainage, etc ; Escherichia coli; cattle; drainage; humans; land use; microbial contamination; nitrogen; phosphorus; pollution; rain; research; runoff; sediments; septic systems; stream flow; swine; tillage; water quality; Show all 19 Subjects
Abstract:
... As non-point sources of pollution begin to overtake point sources in watersheds, source identification and complicating variables such as rainfall are growing in importance. Microbial source tracking (MST) allows for identification of fecal contamination sources in watersheds; when combined with data on land use and co-occuring variables (e.g., nutrients, sediment runoff) MST can provide a basis f ...
... In the U.S. Midwest, nitrate in subsurface tile drainage from corn (Zea mays L.)–soybean [Glycine max (L.) Merr.] systems is detrimental to water quality at local and national scales. The objective of this replicated plot study in northwest Iowa, performed in 2015–2020, was to investigate the influence of nitrogen (N) fertilizer timing on crop production and NO₃ load in subsurface (tile) drainage ...
tiledrainage, etc ; Soil and Water Assessment Tool model; cumulative distribution; environment; fertilizer application; food security; hydrologic cycle; runoff; skunks; snowmelt; stream flow; streams; water quality; watersheds; Iowa; Show all 15 Subjects
Abstract:
... Improving food systems to address food insecurity and minimize environmental impacts is still a challenge in the 21st century. Ecohydrological models are a key tool for accurate system representation and impact measurement. We used a multi-phase testing approach to represent baseline hydrologic conditions across three agricultural basins that drain parts of north central and central Iowa, U.S.: th ...
tiledrainage, etc ; riparian buffers; water table; Iowa; Show all 4 Subjects
Abstract:
... The use of saturated buffers for reducing NO₃-N loads from tile-drained croplands is increasing in the US Midwest and there is a need to develop options for estimating reductions at riparian sites. In this study, we present a paired water table monitoring approach to estimate hydraulic and NO₃-N loading into a saturated buffer in eastern Iowa. One well was located within the saturated buffer (trea ...
tiledrainage, etc ; conservation practices; electrical conductivity; fertilizer rates; fertilizers; groundwater; hydrograph; nitrate nitrogen; nutrient management; reactive phosphorus; soil profiles; soil water; water flow; water quality; water table; Indiana; Show all 16 Subjects
Abstract:
... Apportioning sources, assessing flow pathways, and quantifying the interaction between source and transport factors are critical for decreasing nutrient loss from agricultural catchments. In this study, water, nutrient, and tracer (δ¹⁸O, electrical conductivity) fluxes were measured over two years from a tile-drained field in Indiana, USA to quantify linkages among water flow pathways, management ...
tiledrainage, etc ; Soil and Water Assessment Tool model; drainage water; exports; groundwater; intensive farming; irrigation; river valleys; salinity; soil water; streams; subsurface drainage; water management; watersheds; Arkansas River; Colorado; Show all 16 Subjects
Abstract:
... Subsurface tile drains in areas with intensive agriculture can be a major contributor of salinity loadings to streams and rivers, as salts in soil and groundwater are transported into the tile drains. Modeling tools can be used to assess baseline conditions, quantify salt mass export, and assess management scenarios to decrease salt removal. In this study, a newly developed version of the SWAT mod ...