基于PS最小二乘法的土壤持水曲线方程参数识别  

Identification of Soil Water Retention Curve Equation Parameter Based on PS Least Squares Method

作　　者：王英华[1] 王玉强[1] 张宽地[2] 

机构地区：[1]浙江水利水电专科学校,浙江杭州310018 [2]西北农林科技大学,西安杨凌712100

出　　处：《浙江水利水电专科学校学报》2009年第4期48-50,61,共4页Journal of Zhejiang Water Conservancy and Hydropower College

基　　金：浙江省水利厅科研基金资助项目(RC0612);浙江省水利厅科研基金资助项目(RC0825)

摘　　要：针对目前的土壤持水曲线Van Genuchten方程参数优化方法的不足,通过理论分析得出Van Genuchten方程为参数的单调函数,即为单极值函数.因此,可使用PS最小二乘法识别Van Genuchten方程参数.算例及误差分析表明:PS最小二乘法求解Van Genuchten方程参数算法实现简单、运算速度快、适用性强、计算精度高,为Van Genuchten方程参数的求解提供了一条新途径.Soil water characteristics curves were fitted and Van Genuchten equation parameters were solved by PS least squares method. Compared with other optimized algorithms through cases, it has many merits such as rapid calculation speed, simple programming, genera last regency and high precision, which can be used as a new method to calculate Van Genuchten equation parameters.

关 键 词：PS最小二乘法 VAN Genuchten方程 参数优化 

分 类 号：S152.71[农业科学—土壤学]