Modified Richards’ Equation to Improve Estimates of Soil Moisture in Two-Layered Soils after Infiltration

A Multidomain Discretization of the Richards Equation in Layered Soil

We consider the Richards equation on a domain that is decomposed into nonoverlapping layers, i.e., the decomposition has no cross points. We assume that the saturation and permeability functions are space-independent on each subdomain. Kirchhoff transformation of each subdomain problem separately then leads to a set of semi-linear equations, which can each be solved efficiently using monotone m...

Infiltration in cracking clay soils as affected by initial soil moisture content

morphology, geochemistry, mineralogy, and micromorphology of soils of hormozgan province in relation to parent materials

ویژگی های زمین شیمیایی، کانی شناسی، و میکرومورفولوژیکی خاک ها و سنگ مادر مربوطه در منطقه بین بخش های جنوبی زاگرس و خلیج فارس تا دریای عمان(استان هرمزگان، ایران) مورد بررسی قرار گرفت. هدف های این مطالعه شناسایی تغییرات در خصوصیات فیزیکی، شیمیایی، و ترکیب کانی شناسی خاک، مطالعه میکرومورفولوژی و تکامل خاک، و بررسی توزیع عنصر خاک بر اساس هوازدگی، پروسه های خاک و زمین شناسی جهت توصیف اثرات مواد مادر...

Numerical Tests of the Lookup Table Method in Solving Richards’ Equation for Infiltration and Drainage in Heterogeneous Soils

Mohammad S. Islam 1,*, Claudio Paniconi 2 and Mario Putti 3 1 Department of Mathematics, Shahjalal University of Science & Technology, Sylhet 3100, Bangladesh 2 Institut National de la Recherche Scientique, Centre Eau Terre Environnement (INRS-ETE), Université du Québec, Quebec City, QC G1K 9A9, Canada; [email protected] 3 Department of Mathematics, University of Padova, Padova 35121...

Soil Moisture Profile Model for Two-Layered Soil Based on Sharp Wetting Front Approach

A two-layer model for 1D vertical unsaturated flow based on the hypothesis of a sharp wetting front is presented. The model further assumes a uniform pore pressure throughout the wetting zone at any given time during the infiltration and redistribution processes. These assumptions allow to reduce the theoretical Richards equation to an ordinary differential equation that can track average soil ...