RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2006, Vol. 15 >> Issue (5): 584-587.

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IMITATIVE STUDY ON THE EFFECT OF SILTS AND CULTIVATION ON FLOODING IN DONGTING LAKE

JIANG Jia-hu，HUANG Qun   

  • Received:2005-04-13 Revised:2005-09-30 Online:2006-09-20
  • Contact: JIANG Jia-hu

Abstract: Based on numerical imitative methods, a dynamic numerical model was set up between Dongting Lake and Yangtze River, and imitative calculation for wetland recovery and flood effect were conducted for the area around Dongting Lake. The calculation was based on the flood data obtained between 15th June and 31th August in 1998, and the water level and runoff data from five hydrological observation stations in Yichuang, Zhijiang, Shashi, Jianli and Luoshan for the Yangtze River, and other six stations in Nanzui, Xiaohezui, Yuanjiang, Lujiao, Yueyang and Chenglingji around Dongting Lake, among which there were only water level data for Yuanjiang, Lujiao and Yueyang. Through the calculation, the effect of cultivation and silts on flooding was estimated. It was revealed that for the period from 1952 to 1998, the effect on the rise of water level was 2 to 10 times higher as by the cause of silts than by cultivation.

Key words: Dongting Lake, flood, silts and cultivation

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