长江科学院院报2024，Vol.41Issue(12)：15-22,8.DOI:10.11988/ckyyb.20230703
洞庭湖汛期水位变化特征及其驱动因素分析
Characteristics and Driving Factors of Water Level Variation in Dongting Lake During Flood Season
摘要
Abstract
Dongting Lake is located in the middle reaches of the Yangtze River,and its hydrological characteristics have an important impact on the middle reaches of the Yangtze River.According to the evolution characteristics and driving factors of Dongting Lake water level in flood season under changing environment,this paper analyzes the lowest water level,highest water level and average water level of Dongting Lake in flood season in East Dongting Lake(Chenglingji Station),West Dongting Lake(Nanzui Station)and South Dongting Lake(Yangliutan Station).The Mann-Kendall method and Pettitt method were used to test the variation of the three types of water level series,the frequency change characteristics of the three types of water level series was analyzed based on the GAMLASS model,and the contribution rate of climate change and human activities was quantified by the cumulative slope change rate method,so as to comprehensively analyze the driving factors of water level change in Dongting Lake during flood season.The results show that under the same design frequency,the design values of the three kinds of water level series have different degrees of reduction.In addition,the water storage of Gezhouba,the bending of Lower Jingjiang River and the increase of precipitation were the main reasons for the rise of Dongting Lake water level during the A2 period(1978-2002).During A3 period(2003-2022),the water level of East Dongting Lake decreased due to the influence of the Three Gorges Reservoir,the main stream of the Yangtze River and the inflow of three mouths and four rivers.The West Dongting Lake and the South Dongting Lake are mainly affected by the decrease of precipitation,which leads to the decrease of incoming water volume and the decrease of water level.This study can provide reference for flood control safety and water resources utilization in Dongting Lake area under changing environment.关键词
汛期最低水位/汛期最高水位/汛期平均水位/变异/气候变化/人类活动/洞庭湖Key words
minimum water level in flood season/maximum water level in flood season/average water level in flood season/variation/climate change/human activities/Dongting Lake分类
天文与地球科学引用本文复制引用
隆院男,唐颖,杨家亮,莫军成,宋昕熠..洞庭湖汛期水位变化特征及其驱动因素分析[J].长江科学院院报,2024,41(12):15-22,8.基金项目
国家自然科学基金面上项目(52079010) （52079010）
湖南省重点研发计划项目(2020SK2130) （2020SK2130）
湖南省研究生科研创新项目(CX20230890) （CX20230890）
