逆高斯分布在流域水文模拟中应用初探

APPLICATION OF THE INVERSE GAUSSIAN DISTRIBUTION IN CATCHMENT HYDROLOGICAL MODELLING

探讨与Ｎａｓｈ瞬时单位线具有类似假设条件的逆高斯分布（一种概率密度函数）的由来和特性，并将其应用到水文过程的模拟．检验结果表明，当它应用到大中流域降雨径流过程模拟时具有与Ｎａｓｈ单位线相当的精度．

The Inverse Gaussian Distribution (IGD), one kind of Probability density function,is used as a routing function to model catchment hydrological process, the origin and properties of which are also analysed in this paper. The direct search optimisation techniques, such as Golden,Rosenbrock, Simplex methods, are applied for identification of modelParameters. The resultS obtained for the real data from six catchments have shown that the IGD has the similar Performance to the Nash-IUH, as employed to model the rainfall-runoff process for middle-scale or large-scale basins.