摘要
基于土壤传递函数的原理,可以使用间接法对土壤水分特征曲线进行推求,使用激光粒度分析仪测定试验土样的粒径级配结果,并使用烘干法测定土壤干容重,作为软件Neuro Theta的输入值对土壤水分特征曲线进行计算。将间接法测定的土壤水分特征曲线与传统压力膜法试验直接测定的土壤水分特征曲线进行对比分析,拟合结果理想,从而验证了使用本间接法求解土壤水分运动参数是可行的。这种简便的间接求解土壤水分特征曲线的方法解决了分布式水文模型在进行流域水文模拟的过程中难以取得土壤水运动参数的空间分布的问题。
The traditional method for determining the water characteristic curve（SWCC） is time-consuming and expensive.An indirect method for determining the water SWCC based on principle of pedo-transfer functions was proposed during experiments.By measuring the SWCC of soil sampled in the experimental platform,an indirect method to determine SWCC was found.Sediment grading measured by the Laser Particle Sizer and soil dry bulk density are both the input items of Neuro Theta,with which SWCC can be determined.SWCC determined in this way is proved to be desirable in comparison with that determined with the Soil moisture pressure membrane method.This indirect method improues the defect that the parameter-distribution of soil water movement cannot be obtained in the watershed hydrological modelin.
出处
《实验室研究与探索》
CAS
北大核心
2010年第10期18-20,61,共4页
Research and Exploration In Laboratory
基金
国家自然科学基金项目(50879017)
“十一五”国家科技支撑计划项目(2008BAB29B08-02)
河海大学水文水资源与水利工程科学国家重点实验室开放基金资助项目(2007490811)
关键词
土壤水分特征曲线
间接法
直接法
water characteristic curve
direct method
indirect method
