中国地理科学 ›› 2018, Vol. 28 ›› Issue (3): 456-469.doi: 10.1007/s11769-018-0958-2

• 论文 • 上一篇    下一篇

Water Security-based Hydrological Regime Assessment Method for Lakes with Extreme Seasonal Water Level Fluctuations: A Case Study of Poyang Lake, China

WAN Rongrong1, YANG Guishan1, DAI Xue1,2, ZHANG Yanhui1,3, LI Bing1,2   

  1. 1. Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Nanjing Xiaozhuang University, Nanjing 211171, China
  • 收稿日期:2017-04-01 修回日期:2017-07-19 出版日期:2018-06-27 发布日期:2018-04-27
  • 通讯作者: WAN Rongrong.E-mail:rrwan@niglas.ac.cn;YANG Guishan.E-mail:gsyang@niglas.ac.cn E-mail:rrwan@niglas.ac.cn;gsyang@niglas.ac.cn
  • 基金资助:

    Under the auspices of Key Research Program of the Chinese Academy of Sciences (No. KFZD-SW-318), National Science Foundation of China (No. 41571107), National Basic Research Program of China (No. 2012CB417006)

Water Security-based Hydrological Regime Assessment Method for Lakes with Extreme Seasonal Water Level Fluctuations: A Case Study of Poyang Lake, China

WAN Rongrong1, YANG Guishan1, DAI Xue1,2, ZHANG Yanhui1,3, LI Bing1,2   

  1. 1. Key Laboratory of Watershed Geographic Sciences, Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences, Nanjing 210008, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Nanjing Xiaozhuang University, Nanjing 211171, China
  • Received:2017-04-01 Revised:2017-07-19 Online:2018-06-27 Published:2018-04-27
  • Contact: WAN Rongrong.E-mail:rrwan@niglas.ac.cn;YANG Guishan.E-mail:gsyang@niglas.ac.cn E-mail:rrwan@niglas.ac.cn;gsyang@niglas.ac.cn
  • Supported by:

    Under the auspices of Key Research Program of the Chinese Academy of Sciences (No. KFZD-SW-318), National Science Foundation of China (No. 41571107), National Basic Research Program of China (No. 2012CB417006)

摘要:

Extreme seasonal water level fluctuations characterize natural floodplain lakes in monsoon regions, which are crucial for ensuring lake water security, including flood prevention water supply and health of aquatic ecosystem. In order to achieve this goal, we established a hydrological regime assessment method based on a set of hydrological indicators for lakes with heavy seasonal water level fluctuations. The results suggest that time-sensitive hydrological indicators and specific time scales for various water security aspects must be considered. We discovered that it is more practical and meaningful to combine the water level classification derived from statistical analyses with characteristic hydrological values linked to water security. The case study of Poyang Lake results show that there are no discernable trends of Poyang Lake water regime status over the last 35 years, and the two periods of poor status are in accordance with climate variation in the lake basin area. Scholars and policy makers should focus on both floods and droughts, which are the main water security problems for Poyang Lake. It is hoped that this multi-scale and multi-element hydrological regime assessment method will provide new guidelines and methods for other international scholars of river and lake water assessment.

关键词: lake water regime assessment, water security, seasonal water level fluctuations, natural lakes, Poyang Lake

Abstract:

Extreme seasonal water level fluctuations characterize natural floodplain lakes in monsoon regions, which are crucial for ensuring lake water security, including flood prevention water supply and health of aquatic ecosystem. In order to achieve this goal, we established a hydrological regime assessment method based on a set of hydrological indicators for lakes with heavy seasonal water level fluctuations. The results suggest that time-sensitive hydrological indicators and specific time scales for various water security aspects must be considered. We discovered that it is more practical and meaningful to combine the water level classification derived from statistical analyses with characteristic hydrological values linked to water security. The case study of Poyang Lake results show that there are no discernable trends of Poyang Lake water regime status over the last 35 years, and the two periods of poor status are in accordance with climate variation in the lake basin area. Scholars and policy makers should focus on both floods and droughts, which are the main water security problems for Poyang Lake. It is hoped that this multi-scale and multi-element hydrological regime assessment method will provide new guidelines and methods for other international scholars of river and lake water assessment.

Key words: lake water regime assessment, water security, seasonal water level fluctuations, natural lakes, Poyang Lake