三峡常年库区典型弯曲分汊河道演变特性分析

发布时间：2018-03-01 05:23

  本文关键词： 弯曲分汊河道 冲淤特性 通航状况 演变趋势　出处：《水电能源科学》2017年04期 　论文类型：期刊论文

【摘要】：皇华城河道为三峡常年库区典型的弯曲分汊河道,在三峡成库后"蓄清排浑"模式影响下,该河道淤积强度大、迅速,且已造成航槽易位和摆动,航道条件极其不稳。依据皇华城河道实测地形、来水来沙资料,分析了河段泥沙冲淤特性、典型断面淤积变化、深泓线变化和通航影响,初步预测了该河道的通航状况和演变趋势。结果表明,皇华城河道存在细沙累积性淤积,淤积速度、厚度、范围均较大的特点,且主要淤积部位较为固定,淤积范围有上延趋势;河道左汊深泓年际间发生淤积变化,导致深泓线逐渐从左汊摆动至右汊。
[Abstract]:The Huanghuacheng River is a typical curved braided channel in the three Gorges reservoir area. Under the influence of the model of "storing, clearing and removing muddy" after the formation of the three Gorges reservoir, the channel silting is strong, rapid, and has caused the transposition and swinging of the channel. The channel condition is extremely unstable. Based on the measured topography and the data of incoming water and sediment, the characteristics of sediment scouring and silting, the siltation change of typical section, the variation of deep channel and the influence of navigation are analyzed. The navigable condition and evolution trend of the channel are preliminarily predicted. The results show that the river channel of Huanghua City has the characteristics of accumulation of fine sand, velocity, thickness and range of fine sand, and the main silting sites are relatively fixed. There is an upward trend in the range of deposition, and there is an interannual siltation change in the deep stream of the left branch of the river, which leads to the gradual swing of the deep line from the left branch to the right branch.
【作者单位】： 重庆交通大学河海学院;国家内河航道整治工程技术研究中心;
【基金】：重庆市基础与前沿研究计划项目(cstc2015jcyja90013) 重庆市社会民生科技创新专项项目(cstc2015shmszx30024)
【分类号】：TV147
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本文编号：1550604