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soilwatercontent, etc ; biosphere; heat; models; prediction; Show all 5 Subjects
Abstract:
... Earth Observation (EO) is often combined with simulated process models to gain insight on key parameters for the physical mechanisms and interactions of the Earth's system. The objective of this study is two-fold: First, it explores the combined use of EO data from the Advanced Along-Track Scanning Radiometer (AATSR) with the SimSphere land biosphere model via the “triangle” to derive latent (LE) ...
soilwatercontent, etc ; bedrock; carbonates; isotope fractionation; karsts; water uptake; Show all 6 Subjects
Abstract:
... PURPOSE: Isotope-based root water uptake analysis usually involves cryogenic vacuum extraction (CVE) of water from soil and other water-holding materials, according to the assumption that no isotopic fractionation occurs during the related processes. Recently, a growing body of literature identified isotopic deviations that were caused by CVE. However, the isotopic deviations of water extracted fr ...
soilwatercontent, etc ; mountains; soil water; telemetry; topography; variance; watersheds; China; Show all 8 Subjects
Abstract:
... Soil moisture data were obtained from the Watershed Allied Telemetry Experimental Research Network (Waternet), located in a mountainous region of northwest China, to evaluate the impacts of environmental factors on regional soil moisture spatiotemporal patterns. Based on the temporal stability analysis method, the results showed that soil moisture spatial distributions in the study region were mor ...
soilwatercontent, etc ; data collection; environment; models; prediction; reflectance; satellites; wavelengths; Show all 8 Subjects
Abstract:
... The Hapke bidirectional reflectance model has mainly been used in planetary remote sensing and has given rise to some studies in Earth science. However, it has not yet been comprehensively evaluated using data from different sources, and its ability to model reflectance spectra needs to be further explored. Therefore, the objective of this study was to develop a tangible parametric model of soil h ...
soilwatercontent, etc ; equations; fiber optics; models; soil water; temperature; thermal conductivity; Show all 7 Subjects
Abstract:
... Fiber-optic Distributed Temperature Sensing, when combined with the Single-probe Heat-pulse technique can measure soil moisture (θ) across spatial scales. The key limitation of this system is in obtaining the relationship between soil thermal conductivity (λ) and θ for a specific field. Using the Department of Energy Atmospheric Radiation Measurement (ARM) site, this study tested a new methodology ...
soilwatercontent, etc ; Haloxylon ammodendron; altitude; atmospheric precipitation; evolution; irrigation; landscapes; vegetation; Show all 8 Subjects
Abstract:
... The spatial pattern of vegetation can reflect the impacts of the environment on plants and the response of plants to the environment, which can promote a deep understanding of the potential driving mechanisms of vegetation evolution and community maintenance. A sand-binding vegetation system without irrigation has been implemented in the oasis–desert transitional zone since the 1970 s, where the a ...
soilwatercontent, etc ; forestry; hydrologic data; prediction; risk; soil water; spatial data; Show all 7 Subjects
Abstract:
... Using hydrological models with a high temporal resolution to predict risk for rutting may be a possible method to improve planning of forwarder trails or to schedule logging operations in sites with low bearing capacity to periods when soil moisture content is at a minimum. We have studied whether descriptions of rut variations, collected in 27 logging sites, can be improved by using hydrological ...
soilwatercontent, etc ; calibration; durability; fiber optics; frozen soils; loess; water content; Show all 7 Subjects
Abstract:
... Actively heated fiber-optic (AHFO) method has become a research focus for soil water content measurement in recent years due to its advantages such as small size, distributed measurement and good durability. However, the AHFO method is presently coupled to distributed temperature sensing (AHFO-DTS) which is inevitably limited by low temperature measurement accuracy and spatial resolution. Furtherm ...
soilwatercontent, etc ; agriculture; cameras; electronics; irrigation; precision agriculture; prediction; unmanned aerial vehicles; Show all 8 Subjects
Abstract:
... Soil water content (SWC) estimation is a crucial issue of agricultural production, and its mapping is an important task. We aimed to study the efficacy of UAV-based thermal (TH) and multispectral (MS) cameras in SWC mapping. Soil samples were collected and the SWC content was determined in a laboratory as reference data and four machine learning regression algorithms (Random Forest [RF], Elastic N ...
soilwatercontent, etc ; drainage; neural networks; rivers; roads; satellites; soil water; spatial data; Show all 8 Subjects
Abstract:
... We use surface soil moisture content as a proxy to assess the effect of drainage congestion due to structural barriers on the alluvial Fan of the Kosi River on the Himalayan Foreland. We used Sentinel-1 satellite images to evaluate the spatial distribution of soil moisture in the proximity of structural barriers (i.e., road network). We applied modified Dubois and a fully connected feed-forward ar ...
soilwatercontent, etc ; agronomy; cotton; equations; evaporation; evapotranspiration; groundwater; irrigation scheduling; models; water table; Show all 10 Subjects
Abstract:
... Shallow groundwater is considered an important water resource to meet crop irrigation demands. However, limited information is available on the application of models to investigate the impact of irrigation schedules on shallow groundwater depth and estimate evaporation while considering the interaction between meteorological factors and the surface soil water content (SWC). Based on the Richards e ...
soilwatercontent, etc ; disturbed soils; lidar; risk; soil water; spatial data; topography; water flow; Show all 8 Subjects
Abstract:
... Reliable and accurate soil moisture maps are needed to minimise the risk of soil disturbance during logging operations. Depth-to-water (DTW) maps extracted from digital elevation models have shown potential for identifying water flow paths and associated wet and moist areas, based on surface topography. We have examined whether DEMs from airborne LiDAR data with varying point density can improve p ...
soilwatercontent, etc ; cations; electric current; electrodes; salinity; sludge; soil salinity; technology; water content; Show all 9 Subjects
Abstract:
... Electro-dewatering is believed to be an alternative and effective technique to dewater sludge. The objective of this study is to explore the influence of process parameters (electrode materials, potential gradient, electrode arrangement, soil water content, and soil salinity) on the electro-dewatering transport, which determines the electro-dewatering efficiency. A series of experiments were perfo ...
soilwatercontent, etc ; angle of repose; cohesion; friction; prediction; soil water; spring; water content; Show all 8 Subjects
Abstract:
... Appropriate discrete element modelling (DEM) parameters are essential for accurate prediction of soil properties and disturbance. This study aims to provide an efficient method for accurately determining DEM parameters of a loose cohesive soil in a range of soil conditions. DEM parameters of the loose cohesive soil modelled using hysteretic spring and linear cohesion contact models were determined ...
soilwatercontent, etc ; geophysics; karsts; rain; runoff; seepage; soil depth; topographic slope; water storage; China; Show all 10 Subjects
Abstract:
... Water balance characteristics and rainfall-runoff relationships of karst slope, are poorly understood worldwide, even though karst landscapes occupy 10–15% the planet’s land surface. Dynamic hydrological responses were monitored for 43 rainfall events on a karst slope in southwest China over two years (2018–2019). The responses included surface, subsurface, and epikarst seepage runoff (abbreviated ...
soilwatercontent, etc ; alpine grasslands; ecosystems; eddy covariance; equations; evaporation; soil water; standard deviation; China; Show all 9 Subjects
Abstract:
... Complementary equations have been widely applied to evaporation (E) estimation in poorly monitored areas and under changing conditions. It is essential to determine a priori the key parameter called the asymmetric parameter (or land surface parameter in the sigmoid equation) b for predictive application of complementary equations. A previous study (Wang et al., 2020a) suggested ecosystem mean b va ...
soilwatercontent, etc ; differential equation; friction; furrows; lawns and turf; soil formation; viscosity; water content; Show all 8 Subjects
Abstract:
... It was shown that the soil formation turnover within the furrow is an important condition for precision tillage. The authors identified the possibility of creating a train of combined machines capable of preparing the soil for sowing or planting in one pass. It was noted that due to inertia forces, the cylindrical plow body is able to hold a layer with and without turf. The preliminary tests of th ...
soilwatercontent, etc ; algorithms; cluster analysis; crop management; electrical resistance; geostatistics; soil depth; temporal variation; Show all 8 Subjects
Abstract:
... Knowledge of the spatial variability of soil thickness (ST) in agricultural fields is useful for improving crop management. Spatial patterns of ST can be characterized using temporal stability analysis of high spatial density and temporal frequency data, associated with sparse and difficult to obtain data on the target variable. Apparent electrical resistivity measurements of soil at high spatial ...
soilwatercontent, etc ; image analysis; kinetic energy; liquids; sand fraction; soil texture; transportation; water content; Show all 8 Subjects
Abstract:
... The ejection of a mixture of solid (soil) and liquid (water) phases is one of the aspects of the energy dissipation of the impacting drop during the soil splash phenomenon. All calculations to date have only been taking into account the ejection of solid phase material and were based on significant simplifications of the measured quantities. Therefore, the aim of the study was an improved calculat ...
soilwatercontent, etc ; forests; mineral soils; runoff; topographic slope; water content; water flow; water repellent soils; Show all 8 Subjects
Abstract:
... Surface soil under forests often shows soil water repellency (SWR). The organic (O) layer (e.g., litter layer) and SWR are both well known to affect water movements on hillslopes, yet little is known about their interaction. In this research, we established five O-layer removal (no O layer; NO) plots and seven O-layer remaining (with O layer; WO) plots on the same slope, which had developed thick ...