Abstract:

The soil water and heat coupling numerical simulation are developed on the basis of isothermal moisture movement model in the 1950s. Along with the development of straw mulching water-saving technology, the research of numerical modeling of the soil water and heat made a further progress. Considering the effect of straw mulching layer，simulation on coupled movement of soil water and heat under straw mulching became complicated. This paper introduces the process of soil heat and water transport numerical simulation from bare soil to straw mulching , the empirical formula of the water movement parameters and the solution of boundary condition under straw mulching.