金沙江宜宾段非恒定流过程及传播特性

发布时间：2018-02-26 09:45

本文关键词： 向家坝岷江非恒定流耦合传播特性　出处：《水运工程》2017年10期 　论文类型：期刊论文

【摘要】：金沙江、岷江的非恒定流调节过程较为复杂,在宜宾汇合后形成新的非恒定流向下游传播。通过近年实测资料,分析金沙江、岷江非恒定流特征及汇合效果。结果表明:宜宾段非恒定流特征与向家坝电站下泄非恒定流的符合度更高,岷江的非恒定流无典型过程;宜宾段水位变幅和金沙江、岷江水位变幅存在线性关系;涨幅在1.7 m左右,起调水位在1 m左右的泄水波可作为宜宾段非恒定流过程的典型代表,其在下游的传播速度沿程基本保持一致,衰减幅度随着距离的增加而减小。
[Abstract]:The adjustment process of unsteady flow in Jinsha River and Minjiang River is more complicated, and a new unsteady flow downstream propagation is formed after Yibin confluence. Based on the measured data in recent years, this paper analyzes the Jinsha River. The results show that the characteristics of unsteady flow in Yibin section are more consistent with the discharge of unsteady flow in Xiangjiaba Hydropower Station, the unsteady flow in Minjiang River has no typical process, the fluctuation of water level in Yibin section and Jinsha River, The range of water level variation of Minjiang River has a linear relationship, and the discharge wave with an increase of about 1.7 m and a water transfer level of about 1 m can be regarded as a typical representative of the process of unsteady flow in Yibin section, and its propagation velocity along the downstream is basically consistent. The attenuation amplitude decreases with the increase of distance.
【作者单位】：重庆交通大学水利水运工程教育部重点试验室;重庆交通大学国家内河航道整治工程技术研究中心;长江宜宾航道局;
【基金】：重庆市社会民生科技创新专项(cstc2016shmszx30012)
【分类号】：TV133.2;U612.23

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