摘要
利用实测地形和水文资料,基于一维河网模型系统MIKE 11与HEC-RAS分别建立了南渡江下游河段1维水动力模型。着重以HEC-RAS和MIKE 11对河道糙率的不同计算方法为出发点,利用南渡江实测地形和水文资料进行计算,然后对计算结果进行比较分析,得到2种软件的联系与区别。模型率定和验证结果表明,所建2种模型均能够反映河网水动力条件,但是MIKE 11模拟结果更接近实测值。同时,以南渡江20年一遇洪水为例,模拟了现状河道在修建堤防以后的防洪水位,并对2种模型结果对比分析,为南渡江防洪及河堤规划提供依据。
Based on measured water level and flow data, two different hydrodynamic models for downstream of Nandu river are estab- lished by using MIKE 11 and HEC-RAS. This paper is to study the significant differences of the model methods about the Manning roughness factor （n）. Flow computation and modeling comparison are applied to the downstream of Nandu river to obtain the rela- tively accurate results and the differences by using the HEC-RAS and MIKE 11. The calibrating and validating of the model shows that the simulated water level of any model is in good agreement with the measured value, but the hydrodynamic model based on MIKE 11 has better results. And the 20-year flood level is also calculated, the same results can provide a basis for the flood control prediction scheme in the downstream of Nandu river.
出处
《中国农村水利水电》
北大核心
2014年第2期46-49,共4页
China Rural Water and Hydropower
基金
国家自然科学基金项目(69809007)
