摘要
基于物理机制的分布式水文模型是无水文资料区域的径流模拟的一种有效手段,在对模拟效果的评价中,区间流域水文资料的短缺成为限制条件。针对此问题,该文以三峡区间径流模拟的效果评价为实例,借助区间模拟入流对干流洪峰的模拟作用,对其进行分析和评价。基于三峡区间GBHM（geomorphology-based hydrological model）分布式水文模型,模拟1989~2000年期间的区间径流,为三峡库区河道的HEC-RAS（hydrologic engineering center-river analysissystem）洪水演进模型提供侧向入流资料。比较计入和不计入区间模拟径流2种情况下库区河道洪峰流量的模拟误差,分析GBHM水文模型对区间径流的模拟效果。结果表明：在库区河道洪峰中区间径流占50%的洪水场次中,基于GBHM模型模拟的区间径流,可使洪峰的模拟精度提高到90%以上。基于物理机制的分布式水文模型对三峡区间径流的模拟,具有明显的作用。
A physically-based distributed runoff model can simulate hydrological processes using weather data in a physically reasonable way,with less real-time hydrological data.However,in the poor gauged catchments,insufficient hydrological data hinders model evaluations.The Three Gorges Region was used as a case study to evaluate the effect of regional lateral inflows simulation on flood peak simulations in the mainstream.The regional runoff was simulated using a geomorphology-based hydrological model（GBHM） with the results fed into the hydrologic engineering center-river analysis system（HEC-RAS） flood routing model for the Three Gorges Reservoir.The simulation covered 12 years from 1989 to 2000（before the Three Gorges Project came into the operation in 2003）.The effect of the distributed GBHM model on the flood simulations along the main stream of Yangtze River was evaluated by comparing the simulated runoff with and without regional lateral inflow.The results show that combining the runoff simulated by the GBHM into the HEC-RAS model significantly improved the flood simulations,especially for the lower part of the basin and for the major flood events.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第2期209-214,219,共7页
Journal of Tsinghua University(Science and Technology)
基金
“十一五”国家科技支撑计划项目(2008BAB29B09)
国家自然科学基金资助项目(50823005)
