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RISEfficient Approach to Solving Transient Unsaturated Flow Problems. II: Numerical Solutions
Publisher: American Society of Civil Engineers
Abstract: Although the finite-difference method (FDM) has been commonly used to numerically solve Richard’s equation, numerical difficulties are often encountered, even for comparatively simple problems. To minimize convergence ...
Efficient Approach to Solving Transient Unsaturated Flow Problems. I: Analytical Solutions
Publisher: American Society of Civil Engineers
Abstract: Richard’s equation governs the migration of moisture in the soil under unsaturated conditions. Although this differential equation provides a rigorous approach to simulating important infiltration problems, obtaining ...
Stochastic Foundation to Solving Transient Unsaturated Flow Problems Using a Fractional Dispersion Term
Publisher: ASCE
Abstract: Mathematical modeling of unsaturated water seepage through soils uses the core concepts of continuum mechanics. More precisely, it combines the continuum mass balance equation and Darcy–Buckingham Law into the Richards ...
Novel Approach to Determine Soil–Water Retention Surface
Publisher: ASCE
Abstract: Models have been developed to represent soils, thereby establishing the unsaturated soil theory. Accurate models include physical deductions based on soil properties. The soil–water retention surface (SWRS) represents the ...
Bimodal Soil–Water Retention Curve and <i>k</i>-Function Model Using Linear Superposition
Publisher: ASCE
Abstract: Progress in the study of unsaturated soils and their application in practical geotechnics could be partially attributed to the advancement of their modeling and computational technologies. The soil–water retention curve ...
Coupled Kinetics Adsorption–Desorption Model Applied to Batch Tests
Publisher: ASCE
Abstract: Batch tests are extensively used in a wide range of fields, including environmental engineering, to forecast the impact of sorption on contaminant transportation in soil and wastewater treatment effectiveness. Recently, ...
Geometric Features and Fractal Nature of Soil Analyzed by X-Ray Microtomography Image Processing
Publisher: American Society of Civil Engineers
Abstract: One of the most basic topics in soil mechanics is the geometrical features of the particles and the soil arrangement. Although these features are of high relevance, many definitions and processes used to evaluate them are ...
New 3D Analytical Solution for Modeling Transient Unsaturated Flow Due to Wetting and Drying
Publisher: American Society of Civil Engineers
Abstract: This study presents a novel three-dimensional (3D) analytical solution to the Richards equation, which takes as a basis a linear unsaturated model that was previously proposed. Specifically, the partial differential equation ...
Cellular Automata and X-Ray Microcomputed Tomography Images for Generating Artificial Porous Media
Publisher: American Society of Civil Engineers
Application of a Closed-Form Analytical Solution to Model Overland Flow and Sediment Transport Using Rainfall Simulator Data
Publisher: American Society of Civil Engineers
Abstract: Rainfall erosion can cause environmental and economic damage by decreasing the storage capacity of water reservoirs because of the detachment of soil particles. The purpose of this study was to develop a one-dimensional ...