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| DOI：10.13522/j.cnki.ggps.20180306 |
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| Assessing the Ecological Health of Qianhe Lake Using Grey Correlation Analysis Method |
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XING Guangjun， ZHAO Mengwei
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1.Yellow River Conservancy Technical Institute, Kaifeng 475002, China；2.Water Conservancy Administration Bureau of eastern Henan province, Kaifeng 475002, China
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| Abstract: |
| 【Objective】 Keeping catchment ecology healthy is a critical criterion in developing sustainable ecosystems, and this paper presents an grey correlation method to analyze the ecological health of Qianhe Lake.【Method】 The research was based on baseline-survey of water ecology, water environment and social economy in the basin, and the ecological security of the lake was evaluated using the comprehensively-weighed grey correlation analysis model.【Result】Social and economic impact layer was at levelⅠ, water ecological health layer was at levelⅣ, and service function layer and the management control layer were at level Ⅲ. The overall ecological health of the lake was at level Ⅲ. For all 45 factors we analyzed, those at levelⅠ, Ⅱ, Ⅲ, Ⅳ and Ⅴ contributed to the overall ecological health by 2.05%, 38.66%, 34.19%, 2.88% and 22.22%, respectively. The main factors affecting the ecological security was social economic layer, while the water ecological health layer, service functions layer and management control layer were affected by point-source COD load per unit area, comprehensive nutrition index, the rate of compliance to centralized drinking water quality, and construction of long-acting management mechanism, respectively. 【Conclusion】 The ecological health of the Qianhe lake is at general-security level, and its future improvement should focus on protecting the ecological health layer and establishing a long-term management system. |
| Key words: Qianhe lake; ecological security; comprehensive weight; gray correlation analysis |
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