期刊
HYDROLOGY RESEARCH
卷 47, 期 -, 页码 24-39出版社
IWA PUBLISHING
DOI: 10.2166/nh.2016.044
关键词
hydrodynamic model; low water level; Poyang Lake; river-lake interaction; Yangtze River
资金
- National Basic Research Program of China (973 Program) [2012CB417003]
- Collaborative Innovation Center for Major Ecological Security Issues of Jiangxi Province and Monitoring Implementation [JXS-EW-00]
- National Natural Science Foundation of China [41301023, 41371062]
- Science Foundation of Nanjing Institute of Geography and Limnology, Chinese Academy of Sciences [NIGLAS2012135001]
Seasonal variations in local catchments and connected rivers lead to complex hydrological behaviours in river-lake systems. Poyang Lake is a seasonally dynamic lake with frequent low levels in spring and autumn, which may be triggered by the local catchment and Yangtze River. Based on two typical years, a hydrodynamic model combined with long term hydrological observations was applied to quantify the spatiotemporal impacts of the local catchment and Yangtze River on spring and autumn low water levels in Poyang Lake. As a first attempt, this study explored the spatial differences of the two influences. Simulation results showed that the contributions of the catchment and the Yangtze River were approximately 70% and 30% in spring 1963, and 5% and 95% in autumn 2006, respectively. The area of catchment influence was mainly distributed in channels and southern floodplains, with relatively uniform water levels. The area impacted by the Yangtze River mainly spanned from the northern portion of the waterway to the central lake, with strong spatial variability. This study focused on two typical years; however, the results can be extended to explain common hydrological phenomena and improve future strategies of water resource management in this riverlake system.
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