A Model of Finite-Difference Method for Analysis of Surface Water Flow In the Process of Initial Irrigation and Drainage On the Surface of the Paddy Fields with Unevenness

Abstract

In order to characterize surface water flow in the process of initial irrigation and drainage in paddy fields, a method of finite differences was developed incorporating effects of unevenness of ground surface on surface water flow. This method can reproduce the local water flow resulted from the unevenness of ground surface. The measured water levels at the observation point of the experimental fields agreed well with the calculated ones in the process of initial irrigation and drainage respectively.