Hydrological drought in two largest river-connecting lakes in the middle reaches of the Yangtze River, China
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...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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IWA Publishing
2023-01-01
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| Series: | Hydrology Research |
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| Online Access: | http://hr.iwaponline.com/content/54/1/82 |
| _version_ | 1797903444180205568 |
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| author | Xianghu Li Xuchun Ye Zhen Li Dan Zhang |
| author_facet | Xianghu Li Xuchun Ye Zhen Li Dan Zhang |
| author_sort | Xianghu Li |
| collection | DOAJ |
| description | 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.
HIGHLIGHTS
The average water level of the two lakes in the dry season was lower than that before 2003.;
After 2003, both lakes entered the dry season earlier and the intensity of drought was increased.;
The drought of two lakes in autumn was more consistent with the low water in the Yangtze River.;
The changes in large-scale climate indices more significantly affected the drought in Poyang Lake than that in Dongting Lake.; |
| first_indexed | 2024-04-10T09:33:03Z |
| format | Article |
| id | doaj.art-62f0a9d3ad79428e8c7729086c1df2cd |
| institution | Directory Open Access Journal |
| issn | 1998-9563 2224-7955 |
| language | English |
| last_indexed | 2024-04-10T09:33:03Z |
| publishDate | 2023-01-01 |
| publisher | IWA Publishing |
| record_format | Article |
| series | Hydrology Research |
| spelling | doaj.art-62f0a9d3ad79428e8c7729086c1df2cd2023-02-18T08:25:49ZengIWA PublishingHydrology Research1998-95632224-79552023-01-01541829810.2166/nh.2023.110110Hydrological drought in two largest river-connecting lakes in the middle reaches of the Yangtze River, ChinaXianghu Li0Xuchun Ye1Zhen Li2Dan Zhang3 Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China School of Geographical Sciences, Southwest University, Chongqing 400715, China Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China 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. HIGHLIGHTS The average water level of the two lakes in the dry season was lower than that before 2003.; After 2003, both lakes entered the dry season earlier and the intensity of drought was increased.; The drought of two lakes in autumn was more consistent with the low water in the Yangtze River.; The changes in large-scale climate indices more significantly affected the drought in Poyang Lake than that in Dongting Lake.;http://hr.iwaponline.com/content/54/1/82copuladongting lakehydrological droughtlarge-scale climate indexpoyang lake |
| spellingShingle | Xianghu Li Xuchun Ye Zhen Li Dan Zhang Hydrological drought in two largest river-connecting lakes in the middle reaches of the Yangtze River, China Hydrology Research copula dongting lake hydrological drought large-scale climate index poyang lake |
| title | Hydrological drought in two largest river-connecting lakes in the middle reaches of the Yangtze River, China |
| title_full | Hydrological drought in two largest river-connecting lakes in the middle reaches of the Yangtze River, China |
| title_fullStr | Hydrological drought in two largest river-connecting lakes in the middle reaches of the Yangtze River, China |
| title_full_unstemmed | Hydrological drought in two largest river-connecting lakes in the middle reaches of the Yangtze River, China |
| title_short | Hydrological drought in two largest river-connecting lakes in the middle reaches of the Yangtze River, China |
| title_sort | hydrological drought in two largest river connecting lakes in the middle reaches of the yangtze river china |
| topic | copula dongting lake hydrological drought large-scale climate index poyang lake |
| url | http://hr.iwaponline.com/content/54/1/82 |
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