RESOURCES AND ENVIRONMENT IN THE YANGTZE BASIN >> 2016, Vol. 25 >> Issue (05): 769-776.doi: 10.11870/cjlyzyyhj201605010

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WANZIHU WETLAND ECOSYSTEM MANAGEMENT IN TIME PERIOD BASED ON FLOODING FEATURES

LI Min1, ZHANG Can-ming2, LI Jiao3, DENG Xue-jian4   

  1. 1. College of Tourism Hunan Normal University, Changsha 410081, China;
    2. ASEM Water Resources Research & Development Center, Changsha 410013, China;
    3. Business College of Hunan Normal University, Changsha 410081, China;
    4. School of Life Sciences, Hunan Normal University, Changsha 410081, China
  • Received:2015-08-31 Revised:2015-12-20 Online:2016-05-20
  • Supported by:
    Key Science and Technology Program of Hunan Provincial S&T Department(2013WK4005);International S&T Cooperation Project of MOST(2012DFB30030)

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Abstract: We used 2013 remote sensing images and topographic maps to derive the terrain map, and divided the Wanzi Lake wetland into five terrain ladder including <27 m, 27~28m, 28~29m, 29~30m and >30m. We used 1983-2013 daily average water level data of the Wanzi lake wetland to analyze flooding features of different terrain ladder in spring flood period, flood period, recession period and dry period. We combined biological characteristics and human disturbance analysis to determine the Wanzi Lake wetland ecosystem management ranges and strategies. The results showed that the ecosystem management boundaries in those four periods are 29m, 31m, 29m and 28m terrain ladder dividing line, respectively. These are three key time periods and areas. In the spring flood period, the management target is protecting spawning fish and the key area is the river beach below 28 meters. In the recession period, the management target is protecting fish migration and the key area is migration channel. In the dry period, the management targets are restoring and protecting fish spawning grounds, feeding grounds and migratory bird overwintering grounds, while the key area is the river beach below 28 meters. The key point of ecosystem management is removal of excessive human disturbance (including over exploiting and over fishing) and restoration of wetland ecology function. Human interferences need to be prohibited in the key areas such as contracting beaches and waters for aquaculture, using flood to silt beach and low-lying land, river beach plantation, etc.

Key words: flooding features, ecosystem management, management in time period, Dongting Lake wetland, nature reserve

CLC Number: 

  • P963
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