[1]LI Jingzhi,YAN Xue,LI Jingbao.Assessment on Ecosystem Health of the Three Outfalls River System Region in the Middle Reaches of the Yangtze River[J].Research of Soil and Water Conservation,2019,26(04):272-279.
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Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
26
Number of periods:
2019 04
Page number:
272-279
Column:
Public date:
2019-06-11
- Title:
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Assessment on Ecosystem Health of the Three Outfalls River System Region in the Middle Reaches of the Yangtze River
- Author(s):
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LI Jingzhi1,2, YAN Xue3,4, LI Jingbao5
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1. School of Architecture, Changsha University of Science & Technology, Changsha 410076, China;
2. Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha 410114, China;
3. Xinjiang Institute of Ecology and Geography, Chinese Academy of Sciences, Urumqi 830011, China;
4. University of Chinese Academy of Sciences, Beijing 100049, China
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- Keywords:
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ecosystem health; fuzzy integrated evaluation; the three outfalls river system region
- CLC:
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X826
- DOI:
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- Abstract:
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In order to analyze the ecosystem characteristics of the three outfalls river system region in the middle reaches of the Yangtze River, three aspects including natural ecological conditions, resource utilization and environment protection, social economy and development were selected to construct the ecosystem health assessment index system. The fuzzy integrated evaluation method was used to evaluate and demonstrate the ecological health status in this region from 2001 to 2014. The results showed that: (1) the ecological health status of this region was inferior and in the sub-pathological or the fair healthy state in 2001—2014, the overall situation was fluctuating but increasingly better; the inducing factor of this status was the vulnerable natural ecological conditions; (2) the combined effect of these factors caused the status of hydrology and water resources in the area was complicated, the fluctuation of natural ecological health level was at the score of 0.6 for a long period and the health state alternated between sub-pathological and fair healthy state; thus, improving the stability of water resources was the key issue to be solved urgently in this region; (3) the health level of resource utilization and environmental protection increased significantly and the health score improved from 0.290 (the worst health state,) in 2001 to 0.742 (fair health state) in 2014; however, the exploitation and utilization rate of water resources in the area had been at a relatively high level above 40% for a long time; therefore, optimizing distribution of water resources and the intensive utilization of resources should be emphasized; (4) the momentum of social and economic development was favorable; the health level was improved from the worst health state (0.362) in 2001 to the sub-healthy state (0.819) in 2014. However, the level of urbanization was slightly lower, the income gap between urban and rural was still large and the attention should be paid to overall development of urban and rural areas.