基于 H EC2HM S 模型的温榆河流域水文模拟

水文模拟对于流域防洪减灾、水资源规划管理有重要的意义。将分布式水文模型 HEC2HM S 应用到北京温 榆河流域, 模拟该区域 1980- 2005 年间 6 场暴雨洪水过程和 1983- 1995 年日降雨径流过程, 评估H EC2HM S 模型 在模拟场次洪水和日径流过程两种时间尺度上的适用性。结果表明, 场次洪水模拟的洪峰流量和洪量相对误差均 在 20% 以内, 峰现时差均不超过 2 h, 平均 Nash 效率系数为 01 82, 平均相关系数 r 为 01 92; 日径流模拟率定期和验 证期的平均 Nash 效率系数为 01 6, 平均相关系数 r 为 01 78, 平均相对误差为 31 95 % 。分析结果表明, H EC2H MS 模型在温榆河流域的适用性较好, 能够有效模拟北方地区短时和长时降雨径流过程, 可用于该区域的洪水预报和水 资源评价与管理。

Hydrological simulation of Wenyu River basin based on HEC-HMS model

H ydro log ical simulatio n is impo rtant fo r flo od hazard mitig ation and water resources management. I n this st udy, we a2 dopted t he distributed hy drolog ical mo del HEC2H MS to simulate the flo od ev ents and daily runo ff o f the Weny u River basin in Beijing, China. The mo del was calibrated and validat ed w ith the data o f 6 storm events during 198022005 and daily str eam flow during 198321995. The results show ed that fo r all of t he 6 flo ods, the relat ive erro rs of peak flow and r unoff amo unt w ere less than 20% , and the peak time difference was w ithin 2 h. The aver age Nash efficiency co eff icient and averag e correlation co effi2 cient r w ere 01 82 and 01 92, r espectiv ely. Fo r the daily runoff simulation, the averag e Nash efficiency coefficient w as 01 6, the av2 er age correlation coefficient r was 01 78, and the av erag e relat ive error was 31 95% . Preliminar y analysis showed that the H EC2 HMS model a pplied w ell to the Wenyu Riv er basin. It can effect ively simulate the short2t erm and long2t erm r ainfall and r unoff pr ocesses in norther n China, and can be used fo r floo d fo recast, w ater r eso ur ces evaluation and management in this area.