土壤水分运动参数的确定及其灵敏性能分析

Determination of Soil Water Movement Parameters and analysis of their Sensitivity

土壤水分运动参数是利用Darcy—Richards方程定量研究土壤水分运动的基础。本文对主要土壤水分运动参数之一的水分特征曲线的拟合提出了一整套计算速度快、收敛性能好的联合计算方法和计算程序;并对土壤水分特征曲线以及由其推导出的土壤导水率的灵敏性能进行了大量的理论分析,对其精度也结合试验进行了分析研究。

The soil water movement parameters are basis in quantitatively studies of soil water movement by Darcy - Richards equation, the paper puts forward a whole set of calculating methods and computer program to fit soil moisture characteristic curve, one of the major parameters of soil water movement. These calculating methods have rapidly calculating and converging characterstics. Detailed theoretical analysis for sensitivity of retension curve and deduced conductivity have been given,and study for their precision has been carried out in combination with experiment data.