| A fuzzy evaluation of Ruoergai grassland ecological security based on RS and GIS |
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| DOI：10.7606/j.issn.1000-7601.2007.04.05 |
| Key Words: ecological environment assessment on sensitivity GIS Superimposition analysis |
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| Abstract: |
| On anglicizing by synthesis of land use and related socioeconomic data, and on studying of the ecological risk of Ruoergai County, we constructed the index system based on P-S-R model, uses AHP to follow the modulus calculating out the corresponding weight 23 appraising an index contributing amounts institutes to grasslands ecological security safety. Then based on fuzzy mathematics in fuzzy level analytic method, we evaluated the ecological security condition of Ruoergai grassland on maximal membership degree, and also made a prediction on 2010 using the Markov model. The results indicates that the trend that safe situation of organism's habits has to worsen unceasingly develops since 1995, the “unsafe” membership degree is increased by to some extent, since owing area in 1995 secondary to 0.12538 to arrive at 0.47022 in 2004. The effect to the eco-environment health being continuance degeneration involves three main factors-human economic activity, rat damage and global warming and so on. |
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