In order to make the TOPMODEL structure more reasonable and applicable to semi-humid re?gion for rainfall runoff modeling,the evaporation runoff module and confluence module of TOPMODEL were improved. The vegetation canopy intercept evaporation model and Holtan exceed infiltration runoff model were added in the original evaporation runoff module. The overland flow concentration and the river chan?nels flow concentration of original confluence module were changed to the Nash instantaneous unit hydro?graph and the Muskingum method of flood routing respectively. Then the applicability of improved TOPMOD?EL was tested in the semi-humid region and its results indicated that simulation using modified modules provided much better results than that of the original model. Therefore,improved TOPMODEL could be effi?ciently used and extended scope of application in the Semi-humid region.%为了使TOPMODEL模型结构更合理,并能够用于半湿润地区或半干旱地区的径流过程模拟,文章对TOP?MODEL模型的蒸发产流模块以及汇流模块进行改进,在蒸发产流模块中添加植被冠层截留蒸散发模型和Holtan超渗产流模型,汇流模块中坡面汇流采用瞬时单位线模型,河道汇流采用马斯京根河道洪水演进模型.通过对半湿润地区流域内降雨径流过程的模拟验证,表明通过对TOPMODEL模型的改进,模型对半湿润地区的降雨径流过程模拟精度有很大的提高,拓展了TOPMODEL模型适用范围.
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