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中文摘要：
山洪灾害常造成严重的经济损失和人员伤亡，基于地理信息系统和遥感技术的水文模型集成系统，为无资料地区的山洪预报提供了新的思路。在对2006-2013年降雨特征进行统计的基础上，以自然分水线划分子流域，利用遥感影像和GIS技术提取流域信息，采用HEC-HMS半分布式水文模型进行郴江流域山洪预报。结果表明：对模型验证期的lO场洪水，洪峰流量和洪量相对误差均在20％以内，峰现时差在2h以内的占比为80％，Nash效率系数在0．7以上的占比为80％，模型模拟效果较好；相较于多峰洪水，单峰洪水的模拟效果更好。不同雨型的模拟分析结果表明，D型降水洪峰和洪量的模拟效果较好，而E型降水模拟流量过程与实测拟合较好。
英文摘要：
Mountain flood has caused serious economic losses and casualties. The integration of hydrological model system based on GIS and remote sensing technology provide a new way of thinking for mountain flood forecast of the areas without data. Based on statistics of characteristics of rainfall events from 2006 to 2013, this paper uses the semi-distributed hydrological model HEC-HMS to simulate mountain flood process in Chengjiang River Basin. The study area was divided into a set of sub-basins according to natural watershed line and topographic information was extracted using remote-sensing image and GIS technology. The results show that all of the 10 floods in validation periods has a relative error of peak flow of less than 20%, all has a relative error of runoff amount of less than 20%, 80% has a error time of peak flow within 2 hours and 80% has a Nash efficiency coefficient of greater than 0. 7. The simulated flow agrees well with the observed flow at the outlet of Chengjiang Basin. Compared to muhi-peak floods, the model shows a better performance in rainfloods simulation for uni-peak floods. Analyzing the simulation results for different rainfall patterns, it simulates better for D-type precipitation in peak flow and runoff amount and has a higher fitting degree of flood orocess for E-tvoe orecinitation.
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