摘要
定量研究水库的拦沙效应是揭示水库对河道泥沙输移影响的关键之一.在系统分析三峡上游已建大型水库拦沙作用的基础上,提出了长江上游水库群综合拦沙率计算公式,预测了在建及拟建大型水库运行后三峡上游大型水库的拦沙效应.研究结果表明,现状条件下(1991-2005年),三峡以上地区大型水库拦沙量约为9 860万t/a,大型水库群综合拦沙率约为20.3%.近期拟建大型水库运行后(2020年),三峡以上地区大型水库群年均新增拦沙量将达25 500万t/a,大型水库群综合拦沙率将增加至75.2%.
Construction of reservoirs in the upstream has important impact on downstream of the sediment transport.Based on the analysis of sediment trapped by the constructed large-scale reservoirs（LRs） on the upstream of the Three Gorges Reservoir（TGR）,the trapping efficiency formula of the reservoir group is given to predict the sediment trapped efficiency of the existing and planned reservoirs in the coming decades.Results show that about 98.6 million tons（Mt） of sediment was trapped annually by the existing LRs in 1991-2005,which accounts for 20.3% of the amount of sediment load into TGR in this period.As the planned LRs put into operation（2020s）,the sediment retained by the LRs would most likely increase to 255 Mt per year;and the reservoir sediment trapping efficiency of the LRs will be increased to 75.2%.
出处
《武汉大学学报（工学版）》
CAS
CSCD
北大核心
2011年第5期604-607,612,共5页
Engineering Journal of Wuhan University
基金
财政部专项项目:"全球江河泥沙信息管理数据库建设"
关键词
长江三峡上游水库群
水库拦沙率
泥沙淤积
reservoir group on upstream of the Three Gorges
reservoir sediment trapping efficiency
deposition
