基于下垫面特征计算张力水蓄水容量的方法

Method for Calculating Tension Water Storage Capacity Based on Underlying Surface Features

在概念性分布式水文模型中,张力水蓄水容量空间分布的确定比较困难,而对于传统的新安江模型,流域平均张力水蓄水容量作为模型参数之一起到了重要作用。基于GIS平台,从模型参数的物理意义出发,探讨基于下垫面特征的张力水蓄水容量推求方法,通过选取资料齐全的多个小流域利用人工调参的方法率定出新安江模型张力水蓄水容量参数并与推求值进行比较,结果表明基于地形指数及土地利用/覆被类型推求张力水蓄水容量的方法是基本可行的。

In the conceptual distributed hydrological model, the spatial distribution of the tension water storage capacity is difficult to determine, and for traditional Xin'an River model, the average tension water storage capacity of the basin, as one of the model parameters plays an important role. According to the GIS and physical meaning of model parameters, this paper discusses the method of estimating the tension water storage capacity based on the characteristics of the underlying surface. The parameter of tension water storage capacity of Xin'an River modelis determined by the method of adjusting the parameters on several watersheds with complete data, then compared with the estimated value. The results show that the method based on topographic index and land use or cover type to estimate the tension water storage capacity is basically feasible.