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中文摘要：
将GIS技术应用于水文模型中发展起来的分布式降雨径流预报模型成为近年来流域水文模拟发展的主要趋势．针对流域内降水厦下垫面条件具有时空分布不均匀的特点，通过DEM将流域划分为若干子流域单元，并以TOPMODEL模型为理论基础设计了一个分单元处理产流和汇流过程的分布式降雨径流模型．结合西南某水库汛期入库径流资料进行模拟计算，实验结果表明该模型具有较好的应用效果。
英文摘要：
With the application of GIS technique, distributed rainfall-runoff forecasting model becomes the main development trend of hydrological simulation for drainage area. With the consideration of the spatial basin heterogeneity, a distributed hydrological model is presented based on TOPMODEL. In this model, the topographic index and runoff yield/travel are calculated according to each drainage network form digital elevation models （DEM）. Feasibility-study experiments show that the distributed model presented can be used to model and predict actual reservoir runoff and the results are efficient.
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