水力发电学报2017，Vol.36Issue(9)：60-74,15.DOI:10.11660/slfdxb.20170907
变化环境下黄河下游治理模式对河床冲淤的影响
Effect of training strategies on fluvial process in lower Yellow main stream under hydrological changes
摘要
Abstract
Adjustment of river training strategy for the Lower Yellow River (LYR) has become an issue of major concerns,especially under the condition of remarkable changes in its hydrological features.This work was aimed at the impacts of different training strategies using a one-dimensional model.Starting from an initial bed topography based on the in-situ cross section measurements completed in 2013 and adopting the input hydrographs in three representative hydrological scenarios,we simulated the next 50 years' fluvial process in a long reach that will take two training measures,i.e.wide channel training and narrow channel training,focusing on accumulative riverbed erosion and deposition,its distribution along the channel,and bankfull discharge.The results show that if the existing trend of runoff and sediment yield decreasing keeps unchanged in this period,a favorable riverbed morphology can be expected no matter what strategy is adopted,especially in the narrow channel case that will reduce more sedimentation.However,if the incoming sediment recovers to the mean level of last century,channel shrinkage due to sedimentation inevitably occurs in either case of wide or narrow channel training.This study also shows that narrow channel training will reduce the overall deposition over the long reach of the lower Yellow but it will lead to more aggradation in the transitional reach and hence worsen its hump deposition,which needs further study.关键词
黄河下游/变化水沙形势/治理模式/一维数值模拟Key words
Lower Yellow River/variability of runoff and sediment yield/river training strategy/one dimensional model分类
建筑与水利引用本文复制引用
李肖男,钟德钰,王彦君,王永强,贾宝真,张红武..变化环境下黄河下游治理模式对河床冲淤的影响[J].水力发电学报,2017,36(9):60-74,15.基金项目
水利部公益性行业专项(201401002) （201401002）
国家自然科学基金(51379102 （）
91547204) （）
国家重点研发计划(2016YFC04022500) （2016YFC04022500）
