水资源保护2026，Vol.42Issue(2)：12-19,8.DOI:10.3880/j.issn.1004-6933.2026.02.002
洞庭湖和鄱阳湖入汇对长江中下游河道冲刷量影响的定量分析
Quantitative analysis of confluence impact of Dongting Lake and Poyang Lake on erosion of middle and lower reaches of the Yangtze River
摘要
Abstract
To quantitatively study the impact of the inflow of Dongting Lake and Poyang Lake on the erosion of the middle and lower reaches of the Yangtze River,based on the water and sediment data of the upstream main stream and the inflow of the two lakes,the average water flow erosion intensity over the past five years was used to characterize the water and sediment conditions.A formula for calculating the cumulative erosion of the reaches considering the inflow of lakes was established,and the contribution rate of the inflow of the two lakes to the cumulative erosion of the study reaches was calculated.The results show that after the application of the Three Gorges Project,the inflow of Dongting Lake and Poyang Lake accounts for 45%of the downstream runoff at Datong Station from 2002 to 2023,and the sediment content accounts for 22%.The cumulative erosion amounts of the Chenglingji-Hankou and Hukou-Datong reaches are 510 million m3 and 660 million m3,respectively.The calculated cumulative erosion amount of the research reaches fits well with the measured values,and the determination coefficients are both greater than 0.92.The contribution rate of Dongting Lake's inflow to the cumulative erosion of the Chenglingji-Hankou Reach is 3.3%to 87.4%,while the contribution rate of Poyang Lake's inflow to the cumulative erosion of the Hukou-Datong Reach is 6.6%to 19.7%.关键词
湖泊入汇/冲刷量/水流冲刷强度/洞庭湖/鄱阳湖/长江中下游Key words
lake confluence/erosion amount/flow erosion intensity/Dongting Lake/Poyang Lake/middle and lower reaches of the Yangtze River引用本文复制引用
夏军强,尚海鑫,周美蓉,邓珊珊,假冬冬,胡春宏..洞庭湖和鄱阳湖入汇对长江中下游河道冲刷量影响的定量分析[J].水资源保护,2026,42(2):12-19,8.基金项目
国家重点研发计划项目(2023YFC3209501) （2023YFC3209501）
国家自然科学基金项目(52479075) （52479075）
