水力发电学报2011，Vol.30Issue(3)：109-116,8.
三峡下游不同类型分汊河段冲刷调整特点分析
Research on erosion adjustment features of different types of braided reaches downstream the Three Gorges Project
摘要
Abstract
Riverbed evolution features and trends of different braided types downstream the Three Gorges project (TGP) including the reaches of Yichang-Huyatan, Yidu, Guanzhou and Lujiahe, are analyzed using the prototype observation data.The braided streams in these reaches are divided into non-alternant and alternant types according to whether or not their dynamic axes of flow alternate annually.This analysis shows that since the operation of TGP,these reaches has evolved into a variety of different features, but the major difference in their bed features is reflected by erosion position.In different reaches, the erosion positions are quite different, while they are all on the dynamic axis of flood-season flow.For the alternant-braided streams, the erosion extent of flood-season main branch is larger than the dry-season main branch.This trend is obviously unfavorable to the stability of diversion pattern and it should call a great attention of the flood control and shipping departments.关键词
河流泥沙工程学/河床演变/冲刷调整特点/分析/三峡下游/分汉河道Key words
river sedimentation engineering/ fluvial process/ features of evolution/ analysis/ downstream TGP/ braided reach分类
建筑与水利引用本文复制引用
陈立,周银军,闫霞,罗优..三峡下游不同类型分汊河段冲刷调整特点分析[J].水力发电学报,2011,30(3):109-116,8.基金项目
国家科技支撑计划项目(2006BAB05B03-05) （2006BAB05B03-05）
国家自然科学基金资助项目(10672125) （10672125）
