长江与洞庭湖汇流段水面比降的特征变化分析  

Analysis of Surface Slope in the Confluence Section of theYangtze River and Dongting Lake

作　　者：陈吉琴[1] 张莉 王艳 CHEN Jiqin;ZHANG Li;WANG Yan(Changjiang Institute of Technology,Wuhan 430212,China;Hydrology Bureau Changjiang Water Resources Commission,Wuhan 430010,China;Wuhan Hydrology and Water Resources Survey Bureau,Hubei Province,Wuhan 430074,China)

机构地区：[1]长江工程职业技术学院,武汉430212 [2]长江水利委员会水文局,武汉430010 [3]湖北省武汉市水文水资源勘测局,武汉430074

出　　处：《广东水利水电》2024年第4期36-42,共7页Guangdong Water Resources and Hydropower

基　　金：湖北省自然科学基金一般面上项目(编号:2023AFB887);湖北省中华职业教育社课题(编号:HBZJ2023540)。

摘　　要：基于线性倾向回归趋势分析方法,对长江干流段1996—2017年间监利~莲花塘、莲花塘~螺山河段日平均水面比降进行趋势分析,结果表明:①汛期(5—10月)监利~莲花塘、莲花塘~螺山河段的水面比降呈上升趋势;消落期(5—6月)监利~莲花塘河段水面比降呈微弱下降趋势,莲花塘~螺山河段水面比降呈微弱上升趋势,主汛期(7—8月)和汛末期(9—10月)监利~莲花塘、莲花塘~螺山河段水面比降呈显著上升趋势;②三峡工程蓄水运行后,长江干流监利~莲花塘、莲花塘~螺山河段水面比降均有所增加,幅度分别为6.08%和10.67%。Based on the water level data of Jianli-Lianhuatang and Lianhuatang-Luoshan sections of the Yangtze River from 1996—2017,the change trend of water level is statistically analysed using linear regression analysis.The results show that:①The water surface gradient of the Jianli-Lianhuatang and Lianhuatang-Luoshan sections during the flood season(May-October)shows an upward trend;During the ebb and flow period(May-June),the water surface gradient of the Jianli-Lianhuatangg section showed a weak downward trend,while the water surface gradient of the Lianhuatang-Luoshan section showed a weak upward trend.During the main flood season(July-August)and late flood season(September-October),the water surface gradient of the Jianli-Lianhuatang and Lianhuatang-Luoshan sections showed a significant upward trend;②After the impoundment and operation of the Three Gorges Project,the water surface gradient of the Jianli-Lianhuatang section and Lianhuatang-Luoshan section of the main stream of the Yangtze River has increased,with amplitudes of 6.08%and 10.67%,respectively.

关 键 词：长江 三峡工程 水面比降 变化趋势 

分 类 号：P333[天文地球—水文科学]