| GIS-based assessment of sensitivity of land eco-environment in Shaanxi Province |
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| DOI：10.7606/j.issn.1000-7601.2007.04.04 |
| Key Words: ecological environment assessment on sensitivity GIS Superimposition analysis |
| Author Name | Affiliation | | LI Jun-yi | College of Tourism and Environmental Science, Shaanxi Normal University, Xi’an 710062, Shaanxi | | WU Jin-feng | College of Tourism and Environmental Science, Shaanxi Normal University, Xi’an 710062, Shaanxi | | XUE Liang | College of Tourism and Environmental Science, Shaanxi Normal University, Xi’an 710062, Shaanxi | | CHEN Xiao-jun | College of Tourism and Environmental Science, Shaanxi Normal University, Xi’an 710062, Shaanxi |
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| Abstract: |
| In accordance with the ecological environment sensitive theory and the problems of land ecological environment existing in Shaanxi Province at present, fully considering the ecological environment sensitive influence factors, this paper has selected soil erosion, geological disaster, biodiversity and other 3 ecologic sensitive factors, and determined its superimposition value. Through the acquisition of information, real investigates and studies, quantitative evaluation and other methods, it obtains special charts of 5 appraisal factors. They are the type of soil erosion and the intensity chart, the type of desert and the intensity chart, the chart of geology disaster, ecological environment remote sensing synthesis evolution map, nature protection area and the forest park distribution map. The paper carries on the superimposition analysis using ArcGIS software to special charts of 5 single essential factors according to first rank of ecologic sensitive, obtains land ecological environment sensitive district of the Shaanxi Province. It has discovered that the extreme sensitive area accounts for 9.38% of the total area in Shaanxi Province, which lies mainly in north Shaanxi along the Great Wall. The specific weight sensitive area accounts for 18.61%, which is distributed in Yulin area south of the Great Wall and part of the Qinling region, the ecologic sensitivity is stronger in this area. The moderate sensitive area accounts for 23.3%, which is distributed in the majority of Qinling region and the border region between Yulin and Yan'an.The sensitive area accounts for 33.03%, which is distributed the Weibei and southern part of Yan'an, the majority of Mountain Ba and part of Qinling regions. The low sensitive area accounts for 15.67%, which is mainly distributed in the Guanzhong plain, the valley of the Han River and so on. |
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