| Construction of suitability indicator system of Minqin oasis ecosystem |
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| DOI：10.7606/j.issn.1000-7601.2018.06.39 |
| Key Words: ecosystem suitability evaluation system hierarchical analysis comprehensive index desert oasis |
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| Abstract: |
| On the basis of exploring the concept of ecosystem suitability, we took Minqin Desert Oasis as the research object and established 5 criteria layers and the weight coefficients of 19 indicators using analytic hierarchy process(AHP). By using other study results and current domestic and international standards, the evaluation index system of the suitability classification of Minqin desert oasis ecosystem was constructed, then, the ecosystem suitability for the period from 2010 to 2015 was comprehensively evaluated. The results showed that the comprehensive scores were 32.73, 37.84, 50.73, 58.22, 75.23, and 80.79 for the 6 years, respectively.The suitability increased from the low score/not suitable in 2010 to a relative stable score in 2013,then, to more suitable status in 2015. The highest growth rate in the score was 25.41% in 2012 and 22.61% in 2014, and the growth rate slowed down to 6.88% in 2015. Through the analysis of each indicator layer, it is concluded that local hydrology and water resources have the greatest impact on the suitability of ecosystem and the second factor is ecosystem construction. |
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