A one-dimensional model for simulating soil water movement

Abstract

Two simulation models have been used to predict water movement in soil and soil water content in a wheat field at Guan Yun (China). A backward finite difference approach was used to solve for the upward water flux and the water movement under a water table control system. It was found that the upward water flux decreased non-linearly as the water table depth (depth below root zone) increased, and a regression analysis revealed the relati-onship to be exponential. The values of calculated and measured soil water content and total evapotranspiration decreased with number of days after rain or irrigation. The nodal soil water content also decreased with the soil depth.


(Journal of Applied Science and Technology: 2001 6(1-2): 56-64)