分层水库异重流挟沙特性及适宜排沙口的确定
发布时间：2019-07-05 18:38
【摘要】：利用异重流排沙是控制水库泥沙淤积和避免水库浑水现象的一种有效手段,但是目前对水库水温分层环境下的情况却鲜有研究。基于自然水温分层的分层模型水库研究,分别在入流量为0.08~0.64 m~3/h、入流泥沙浓度为1.25~7.5 g/L和泥沙粒径为0.01 mm的条件下,进行了一系列分层水库异重流的中试研究,测定了水库中5个断面、6个运行时间下的垂向泥沙浓度分布,系统分析了其变化特性和影响因素。对于固定工况,定义出水口断面处泥沙浓度不低于10%最大浓度(≥10%C_(max))的位置为适宜排沙口位置。中试结果表明,在跃温层温度梯度为41~48℃/m的分层条件下,入流量和泥沙浓度均能影响水库内异重流的主要挟沙范围及适宜排沙口的位置。水库内最大泥沙浓度随入流量和泥沙浓度的增大而增大,其主要挟沙范围亦随之扩大,异重流排沙口的适宜垂向位置下移。
[Abstract]:The use of different heavy flow sediment discharge is an effective means to control reservoir sediment deposition and avoid reservoir muddy water phenomenon, but at present, there are few studies on the situation of reservoir water temperature stratification environment. Based on the study of layered reservoir with natural water temperature stratification, a series of pilot-scale studies of different heavy flow in layered reservoir were carried out under the conditions of inflow flow of 0.08 鈮，
本文编号：2510730
[Abstract]:The use of different heavy flow sediment discharge is an effective means to control reservoir sediment deposition and avoid reservoir muddy water phenomenon, but at present, there are few studies on the situation of reservoir water temperature stratification environment. Based on the study of layered reservoir with natural water temperature stratification, a series of pilot-scale studies of different heavy flow in layered reservoir were carried out under the conditions of inflow flow of 0.08 鈮，
本文编号：2510730
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