Hydrological drought in two largest river-connecting lakes in the middle reaches of the Yangtze River, China

IF 2.7 4区环境科学与生态学 Q2 Environmental Science

Hydrology Research Pub Date : 2023-01-10 DOI:10.2166/nh.2023.110

Xianghu Li, Xu-chun Ye, Z. Li, Dan Zhang

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引用次数: 4

Abstract

Poyang and Dongting Lakes are two important river-connecting lakes with a complicated water system pattern in the middle reaches of the Yangtze River, China. Recently, extreme drought events occurred frequently in the two lakes. This study analyzed the characteristics and differences of hydrological droughts in Poyang and Dongting Lakes during the period of 1964–2016 and explored the correlation between drought and large-scale climate indices. The results showed that the hydrological droughts of Poyang and Dongting Lakes became increasingly serious. Especially after 2003, both lakes entered the dry season earlier and the intensity of drought was increased. The hydrological drought of Poyang Lake was more serious than that of Dongting Lake in spring (16.40%) and winter (14.26%), while the autumn drought in Dongting Lake (32.46%) was severer than that in Poyang Lake (27.65%). The spring droughts in the two lakes were significantly associated with droughts in their local catchments with the joint probabilities of 10.84 and 9.52%, while the autumn droughts were consistent with the hydrological droughts of the Yangtze River with large joint probabilities (26.39 and 27.76%). The changes in large-scale climate indices more significantly affected the drought in Poyang Lake than that in Dongting Lake, especially in autumn and winter.

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中国长江中游两个最大的连河湖的水文干旱

鄱阳湖和洞庭湖是中国长江中游两个重要的连河湖泊，水系格局复杂。近年来，两湖极端干旱事件频繁发生。分析了1964-2016年鄱阳湖和洞庭湖水文干旱的特征及差异，探讨了干旱与大尺度气候指标的相关性。结果表明，鄱阳湖和洞庭湖水文干旱日益严重。特别是2003年以后，两湖进入旱季时间提前，干旱强度增大。春季(16.40%)和冬季(14.26%)鄱阳湖水文干旱严重程度高于洞庭湖，秋季(32.46%)旱情严重程度高于鄱阳湖(27.65%)。两湖春季干旱与当地流域干旱的联合概率分别为10.84和9.52%，秋季干旱与长江水文干旱的联合概率较大(分别为26.39和27.76%)。大尺度气候指数的变化对鄱阳湖旱情的影响大于洞庭湖，尤其是秋冬季。

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来源期刊

Hydrology Research Environmental Science-Water Science and Technology

CiteScore

5.30

自引率

7.40%

发文量

审稿时长

17 weeks

期刊介绍： Hydrology Research provides international coverage on all aspects of hydrology in its widest sense, and welcomes the submission of papers from across the subject. While emphasis is placed on studies of the hydrological cycle, the Journal also covers the physics and chemistry of water. Hydrology Research is intended to be a link between basic hydrological research and the practical application of scientific results within the broad field of water management.