汾河上游流域分布式水文模型的构建

Distributed Hydrological Watershed Model Establishment in Upper Fenhe Watershed

针对研究区的水文、气象特点，本文以坡度、坡向为下垫面主要因素，按照集水区自然分水线划分子流域的流域离散方法，将SCS产、汇流模型与马斯京根法相结合建立了基于流域尺度的次降雨一径流分布式水文模型。模型对研究区典型流域模拟结果表明，该模型的径流量合格率及汇流合格率分别达到70％和80％，且计算流量过程与实测流量过程吻合较好，可适用于该研究区。

Taking gradient and slope angle as main factors, a watershed is discretized into some subcatchments according to natural draining divide, and aiming at characteristics of the research area, a rainfall-runoff distributed hydrological model orienting to catchment scale is established in this thesis with combination of runoff yielding and water routing model of SCS and Muskingum method. To test accuracy of this model, Lanhe catchment of is chosen to integrate with this model. Through analysis of computational modeling results, it shows that calculated runoff yielding and water routing which meet to demand account for 70% and 80% respectively, and modeling discharge process are basically coincident with measured discharge process. The model is applicable to the upper Fenhe watershed.