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首页> 外文会议>Flood Forecasting and Water Resources Assessment for IAHS(International Association of Hydrological Sciences)-PUB >Regional Floods Modeling in the Three Gorges of the Yangtze River
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Regional Floods Modeling in the Three Gorges of the Yangtze River

机译：长江三峡的区域洪水模拟

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摘要

The regional floods occurred in the Three Gorges which is a concentration zone of rainstorm, have most important effect on the safety and operation of the Three Gorges reservoir. Toward forecast of the regional floods, a distributed hydrological model based on characteristics of watershed geomorphology has been developed, which can describe the spatial variability of topography, land use, soil properties as well as rainfall. The present sparse raingauge networks and other factors in this region bring uncertainties into the floods modeling. In this paper, the sensitivities of flood response to the spatial variation of rainfall are also addressed, using raingauge data combining with weather-radar data. The results show, though there are 78 telemetry rain gauges in the Three Gorges, it is not enough to represent the spatial variability of rainfall in some mountainous area. Applying the radar data combining with raingauges to model, it is available to improve greatly the accuracy of modeling.
机译：三峡是暴雨的集中区，发生了区域性洪灾，对三峡水库的安全和运行影响最大。为了对区域洪水进行预报，建立了基于流域地貌特征的分布式水文模型，该模型可以描述地形，土地利用，土壤特性以及降雨的空间变异性。目前该地区稀疏的雨量计网络和其他因素为洪水建模带来了不确定性。本文还结合雨量计数据和天气雷达数据，探讨了洪水对降雨空间变化的敏感性。结果表明，尽管三峡区有78个遥测雨量计，但这不足以代表某些山区降雨的空间变化。将雷达数据与雨量计相结合进行建模，可以大大提高建模精度。

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