Abstract: When numerical models are used for estimating the water flow and solute transport at field scale, modelers are confronted with the issue of spatial variability of soil hydraulic properties. In this paper, the concept of ...

Abstract: This paper provides a theoretical basis for new features added to the SWMS_3D model of Simunek et al., including spatially varied land use, dynamic root distributions and water uptake, and various fluxes at the soil-atmosphere ...

Abstract: Temporal and spatial changes in the flow profile decrease with time under furrow irrigation, and these slow changes suggest modifications in the simulation methods. Geometrically increasing time steps and node deletion at ...

Abstract: Performance of farm irrigation systems may be limited by water delivery system flexibility. A soil water storage simulation model (SWSSM) was developed to calculate daily soil water storage and corresponding evapotranspiration ...

Abstract: Saturated hydraulic conductivity for clays predicted using the conventional Kozeny–Carman equation is scalar and found to diverge significantly from measured values. The divergence is consistent and systematic requiring a ...

Abstract: A new equation for effective stress is derived from a physically based approach of force balance on submerged granular particles. The Euler cut principle and the Euler’s first law of mechanics are used to analyze the ...

Abstract: The retirement of land from agricultural production as a means of reducing the volume of subsurface drainage generated in the Western San Joaquin Valley, Calif., is under consideration. Reticence among local farmers and ...

Abstract: Current land retirement programs seek to address drainage management challenges in the western San Joaquin Valley of California using a willing seller strategy. In choosing between available parcels, the program managers ...

Abstract: Hydrology is the science concerned with distribution, circulation, and properties of water of the earth and its atmosphere, across the full range of time and space scales. Subject matter ranges widely from chemical and ...