Humans have exerted large-scale changes on the terrestrial biosphere, primarily through agriculture; however, the impacts of such changes on the hydrologic cycle are poorly understood. The purpose of this study was to test the hypothesis that the conversion of natural rangeland ecosystems to agricultural ecosystems impacts the subsurface portion of the hydrologic cycle by changing groundwater r...

Root elongation in drying soil is generally limited by a combination of mechanical impedance and water stress. Relationships between root elongation rate, water stress (matric potential), and mechanical impedance (penetration resistance) are reviewed, detailing the interactions between these closely related stresses. Root elongation is typically halved in repacked soils with penetrometer resist...

Water dripping into subterranean cavities within fractured porous media is studied in order to improve estimates of dripping rates, drop sizes, and chemical composition of droplets that could affect long-term integrity of waste disposal canisters placed in caverns. Steady state liquid flux in fracture surfaces supported by flow in partially liquid-filled grooves and liquid films in adjacent pla...

Limited by the independence and its defects of each general software package, simultaneous analysis runoff, seepage, large-deformation is still an inevitable challenge. Generally, one landslide-related large-deformation, runoff ignored or indirectly assessed during unsaturated soil landslide runout simulation. To provide a brand new solution, this paper declares local shear strength (LSS) metho...

Soil-water retention curve (SWRC) has a wide application in geoenvironmental engineering from the predication of unsaturated shear strength to transient two-phase flow and stability analyses. Although various SWRC models have been proposed take into account some influencing factors, less attention given consider effects pore fluid osmotic potential. Therefore, key objective this study is extend...

Aim of this paper is to review and compare different business process modeling techniques, reveal their capabilities and use a combination of their elements to create a model of applicable simulation solution that is easy to understand on the one hand but enables integration of innovative complex dynamics on the other hand. We develop a simulation solution proposal that is based on three layers...

Unsaturated soil shear strength is a significant topic in geotechnical engineering. The measurement of unsaturated properties such as and matric suction could be costly, hard, time-consuming, often impractical to obtain. purpose this research propose new model for predict the by using degree saturation directly because water easy More specifically, study focused on Bishop’s theory van Genuchten...

in this study, the effect of suction and the parameters such as suction amplitude, suction coefficient and suction jet length on naca0012 was evaluated. the turbulence employed model was the rsm model. suction jet is located in 10% of the chord length. the range of suction jet entrance velocity was selected from 0.1 to 0.5 of freestream velocity. the maximum increase in lift to drag ratio was s...

The current study assesses critical condition of oil dispassion, considering the unsaturated soil condition dispersity behavior for oil dispersion. The numerical model is used as a finite element method to model the oil spill pollution with two different saturated and unsaturated soil conditions chosen and their pollution dispersion results compared. Extracted results from numerical model show ...