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首页> 外文期刊>International Journal of Erosion Control Engineering >Analysis of the Future Reservoir Sedimentation at Several Watersheds Considering the Geologic and Topographic Characteristics of the Basins
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Analysis of the Future Reservoir Sedimentation at Several Watersheds Considering the Geologic and Topographic Characteristics of the Basins

机译：考虑盆地地质地形特征的多流域未来水库泥沙分析

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摘要

Many of the dams and reservoirs in Japan have been operated for more than thirty years and some of them face sedimentation problems. In addition research and investigation of climate change is ongoing and its impact has been clarified recently. Therefore the authors try to predict future reservoir sedimentation considering impact of climate change by use of a sediment runoff model developed by Egashira and Matsuki. The authors consider that their sediment runoff model is convenient because a topographic model of the dam’s basin for numerical analysis is relatively easy to provide. However, the model does not have a sediment supply process from mountain slopes to river channels. This is an issue and applicability of the model is considered to be limited. In this paper the authors carry out correlation analysis between water inflow to reservoirs and reservoir sedimentation for several dams and analyze applicability of the model from the viewpoint of relationship between correlation coefficient and characteristics of the dam’s basin. As a result, the authors reach a conclusion that large specific sedimentation rate and gentle river bed slope near the reservoir entrance are important characteristics for applicability of the model. In the end the authors carry out simulation analysis of reservoir sedimentation against one of the dams and confirm acceleration of future reservoir sedimentation due to the impacts of climate change.
机译：日本的许多水坝和水库已经运行了三十多年，其中一些面临沉积问题。另外，气候变化的研究和调查正在进行中，其影响最近已得到澄清。因此，作者尝试使用Egashira和Matsuki开发的泥沙径流模型，考虑气候变化的影响来预测未来的水库泥沙淤积。作者认为，他们的泥沙径流模型很方便，因为大坝盆地的数值模拟地形图模型相对容易提供。但是，该模型没有从山坡到河道的沉积物供应过程。这是一个问题，该模型的适用性受到限制。本文对几座大坝的水库入库水量与水库泥沙淤积关系进行了相关分析，并从相关系数与大坝流域特征之间的关系出发，分析了该模型的适用性。结果，作者得出的结论是，较大的比沉降速率和水库入口附近的平缓河床坡度是该模型适用性的重要特征。最后，作者对其中一个水坝进行了水库沉积的模拟分析，并确认了由于气候变化的影响，未来水库沉积的加速。

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