三峡水库典型入库水沙序列对比研究
Comparative study of typical input flow and sediment sequences of the Three Gorges Reservoir
张成潇 1赵汗青 1任实 1吕超楠1
作者信息
- 1. 中国长江三峡集团有限公司,湖北武汉 430010
- 折叠
摘要
入库水沙序列的选取贯穿于三峡水库从规划到运行的各个环节,直接决定了水库规模、建设周期、运行方式和优化调度等关键方面.基于1961-1970年序列(简称60 s序列)、1991-2000年序列(简称90 s序列)、2011-2020年序列(简称10 s序列)的实测资料,分析各序列的入库水沙特征和发展趋势.研究结果表明:随着序列更新,年入库水量年内两极化特征趋于加重,年入库沙量离散程度趋减.各序列最大洪水年的入库水量无显著差异,但60 s和90 s序列的入库沙量相当,10 s序列的入库沙量少于90 s序列最枯年份.60 s和10 s序列的入库水沙来源相近,90 s序列嘉陵江来沙占比显著减少.主汛期内高来沙月份趋于集中,来沙量占全年比重趋于增大.
Abstract
The selection of input flow and sediment sequence runs through every stage from planning to operation of the Three Gorges Reservoir(TGR),which directly determines the reservoir scale,construction period,operation mode and optimal scheduling direction.Based on the measured data of 1961-1970 sequence(60 s sequence),1991-2000 sequence(90 s sequence)and 2011-2020 sequence(10 s sequence),the input flow-sediment characteristics and development trend of above sequences are comparative analyzed.The results show that with the progression of sequences,the polarization of annual water volumes tends to increase,and the dispersion degree of annual sediment volumes tends to decrease.There is no significant difference in the inflow volume in the maximum flood year of each sequence.However,the magnitude of the incoming sediment in the 90 s sequence and 60 s sequence is basically equivalent,and the sediment in 10 s sequence is lower than that in the driest year of 90 s sequence.The sources of incoming water and sediment in 60 s and 10 s sequences are similar,while the proportion of incoming sediment from Jialing River in 90 s sequence is decreased significantly.During the main flood season,the months with a large amount of incoming sediment tend to be concentrated with the proportion of incoming sediment to the whole year tending to increase.
关键词
三峡水库/入库水沙/水沙来源/典型序列Key words
Three Gorges Reservoir/incoming flow and sediment/source of flow and sediment/typical se-quence引用本文复制引用
基金项目
国家重点研发计划项目(2022YFC3203900)
国家自然科学基金项目(52209083)
中国长江三峡集团自主科研项目(WWKY-2021-0033)
中国长江三峡集团自主科研项目(NBZZ202200375)
出版年
2024
国家科技期刊平台
NSTL
万方数据