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Showing 1 to 18 of 18 for “"Soil hydraulic properties"”.
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Characterization of surface soil hydraulic properties in sloping landscapes
Saturated and near-saturated surface soil hydraulic properties influence the partition of rainfall and snowmelt into infiltration and runoff. The goal of this study was to characterize near-saturated surface soil hydraulic properties and water-conducting porosity in sloping landscapes. The specific …
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The Influence of Trees on Soil Hydraulic Properties : Species Effects and the Provision of Ecosystem Services.
… ecosystem services through their influence on soil properties and functions, including water purification and regulation. Forest soils tend to have a higher saturated hydraulic conductivity (Ks) than soils under other vegetation, so the establishment of streamside tree buffer zones and …
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Optimisation of pedotransfer function models for soil hydraulic properties using an artificial neural network ensemble method
Soil hydraulic properties are very time-consuming and expensive to measure directly. Conversely, routinely collected soil survey parameters (e.g. soil texture, dry bulk density and organic matter content) are relatively cheap and easy to collect. Fortunately, mathematical regression models called …
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Soil burn severity and climatic analysis of post-wildfire soil hydraulic properties from across the western continental United States
Rainfall infiltration into soil is a key factor in both landscape development and generation of rainfall-runoff hazards like flash flooding and debris flows in recently burned areas. However, infiltration capacity is spatially and temporally variable, which makes its prediction challenging, …
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Infiltration controls in a tallgrass prairie at a hillslope scale
Infiltration capacity influences the ability of a soil to absorb and transmit water through macropores and micropores of the soil structure. Infiltration is primarily influenced by the soil type, which is dependent on a number of factors including parent material, climate, biological activity, and …
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Integrated Numerical Modeling of Spatial and Time-Variant Hydrologic Response in Subsurface Drained Watersheds
… good predictions with accurate descriptions of soil hydraulic properties, climatic data and drainage parameters. Simulated results at the field scale also indicated that the subsurface model was highly sensitive to estimates of evapotranspiration during the summer. Hydraulic parameters obtained …
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Evaluation of Modern Irrigation Techniques with Brackish Water
… investigate the influence of geometric design, soil type, irrigation regime and amount, and salinity of irrigation water on soil water and salinity distribution as well as irrigation efficiency using drip irrigation techniques in Egypt and Tunisia. Field and laboratory experiments as well as …
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Variability of physical, chemical and hydraulic parameters in soils of Mt. Kilimanjaro across different land uses
The heterogeneity of soils is a key to biological processes, carbon turnover and water storage. Climate change and anthropogenic land use changes often decrease important functioning of soil systems. In order to understand the soil complexity, sophisticated technologies to measure soil properties …
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CFD modelling of fluid flow and contaminant transport in hydrogeological systems
… material behaviour exhibited by porous soils and the fluid flow evaluation under system stresses is described by elasto-visco-plastic constitutive relationships and the coupling between CFD and CSM processes. The designed simulation models are used to calibrate the flow problems …
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Field and laboratory investigations of solute transport through soil
… method were developed to simultaneously estimate soil hydraulic properties and mobile/immobile solute transport parameters in situ. In this study, immobile water contents (thetaim) and mass exchange coefficients (alpha) were estimated with the multiple tracer method and the single tracer methods …
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Variational assimilation of remote sensing data for land surface hydrologic applications
Soil moisture plays a major role in the global hydrologic cycle. Most importantly, soil moisture controls the partitioning of available energy at the land surface into latent and sensible heat fluxes. We investigate the feasibility of estimating large-scale soil moisture profiles and related land …
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Investigation and modeling of unsaturated flow through swelling soils
… water movement through an unsaturated, swelling soil has been developing for a number of years, the efficiency of the results has been limited, and the developed models have suffered from a lack of a mechanism to reliably define water flow and experimental techniques for measuring the unsaturated …
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Quantification of wildfire-induced perturbations to soil-water retention curves and their impact on rainfall runoff
… to these hazards requires understanding which soil properties are most strongly affected by wildfire and what role these changes play in runoff generation and debris-flow initiation. Previous studies have shown significant post-fire perturbations to saturated hydraulic conductivity (Ks) and …
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ASSESSMENT OF THE EFFECT OF EXPANDING RESIN INJECTIONS ON SOIL AND GROUNDWATER FLOW CONTAINMENT
… resin injections as a containment technology for soil and groundwater flow in granular soils, in collaboration with Geosec s.r.l., leading company in resin injection treatments. These treatments, commonly used in geotechnical engineering to address settlement issues in foundations and …
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Soil Moisture Measurements and Modeling at a Geomorphically Reclaimed Coal Mine in New Mexico
… Disturbed and undisturbed samples of reclaimed soil were collected for laboratory tests from the mine site located in northwest New Mexico. Saturated and unsaturated hydraulic properties were determined from falling head tests, hanging column tests, pressure plate tests, and dew point …
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Cosmic-ray neutron sensing for soil moisture measurements in cropped fields
… sensing (CRS) approach to measure field-scale soil moisture in cropped fields. Primary cosmic rays penetrate the top atmosphere and interact with atmospheric particles. Such interaction results on a cascade of high-energy neutrons, which continue traveling through the atmospheric column. …
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Data-Driven and Process-Based Modeling Approaches for Advancing Irrigation Water and Nitrogen Management in Humid Cropping Systems
… frequent shifts between too little and too much soil water. Since irrigation decisions depend on the current soil water status, this variability makes it harder to know the right timing and amount of irrigation. The same swings also influence how nitrogen moves through the soil. Climate change is …
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Analyse und Konzeption von Messstrategien zur Erfassung der bodenhydraulischen Variabilität
Die Berücksichtigung der flächenhaften bodenhydraulischen Variabilität gilt bei der Modellierung von Wasser- und Stofftransportprozessen als problematisch. Dies liegt vorrangig an ihrer Erfassung, die kosten- und zeitintensiv ist. Die vorliegende Arbeit untersucht verschiedene Messstrategien, die …