Parameters of vG Model for Soil Water Retention Curve

摘要：

The soil water retention curve is the foundation to numerically simulate the soil water movement,so it is of great significance to build models to describe the soil water retention curve and to estimate the parameters.In this paper,vG model parameters of the soil samples in Unsaturated Soil Hydraulic Property(UNSODA) are estimated with MATLAB,and the results indicate..(1) In order to exactly reflect the character of the soil water retention curve,the experimental data should be enough to cover all the water content range with equall distribution;(2) Parameter a lies between 0 and 1.0(1/cm) and mostly lies between 0 and 0.1(1/cm);parameter n mostly lies between 1.0 and 2.0 except for that of sand.(3) When the soil stickiness is bigger,the parameter a is bigger but the parameter n is smaller.

关键词： soil water retention curve vG model UNSODA

作者: Cong Zhentao Zhang Zhuoying Ni Guangheng Lei Zhidong

作者单位: Department of Hydraulic Engineering,Tsinghua University,Beijing,100084,China

会议类型: 国际会议

会议名称: International Conference on Effective Utilization of Agricultural Soil & Water Resources and Protection of Environment and the 4th Annual Academic Conference of Chinese Society of Agricultural Soil and Water Engineering

会议地点: 南京

会议语种:英文

页码: 222-226

在线出版日期: 2006-08-16（万方平台首次上网日期，不代表论文的发表时间）