HEC-RAS系列模型在洪水演进模拟中的应用研究

HEC-RAS（River Analysis System）is developed by the U.S. Army Corps of Engineers, with which one-dimension flood routing calculations can be performed. Geometric data of river system needed by HEC-RAS can be created by HEC-GeoRAS. In this paper, principle and procedures of performing hydrologic calculations by HEC-RAS as well as principle and procedures of creating geometric data by HEC-GeoRAS is introduced. As applications, HEC-RAS and HEC-GeoRAS are used to model the lower lake of Nansi lake, several floods are simulated by the model, and the results shows that the model is suitable for nansihu.