水利水电科技进展2018，Vol.38Issue(2)：26-32,7.DOI:10.3880/j.issn.1006-7647.2018.02.005
入湖展宽河道淤积调整沿程变化分析
Analysis on variation of siltation and adjustment along a widening river channel connected to a lake
摘要
Abstract
A physical model test for the diversion project of the Fu River into Qinglan Lake was conducted to investigate the siltation and adjustment law of a channel connected to a lake with a gradually widening boundary. The results show that there exists a spatial variation for deposition styles and cross-section adjustment along the channel in the initial siltation state. A stable single channel develops with natural levees in the upper reach. A relatively stable braided channel develops with transverse bars,point bars and longitudinal bars in the middle reach. In the lower reach, siltation bulks of different scales and siltation location adjustment appears accompanying with the phenomena of cut-bank and channel diversion. The reason for such spatial variation has been discussed in the perspective of hydrodynamic and sediment dynamics. The relationship between the mainstream flow velocity and the incipient velocity of median size sediment is an important indicator to determine the adjustment of river bed erosion and deposition, which could possibly be a key reason for the variation of initial siltation along a widening river channel.关键词
河道展宽/淤积/河工模型/冲淤特性/青岚湖Key words
channel widening/siltation/physical model/characteristics of scouring and deposition/Qinglan Lake分类
建筑与水利引用本文复制引用
罗优,雷文韬,丁晶晶,简鸿福..入湖展宽河道淤积调整沿程变化分析[J].水利水电科技进展,2018,38(2):26-32,7.基金项目
国家自然科学基金 (51409132) （51409132）
