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| Evaluation of Ecological Security in Duolun County |
| Zhou Jinxing1,Chen Hao2,Zhang Huaiqing3,Cai Qiangguo2 |
| 1.Institute of Forestry, Chinese Academy of Forestry Scientific Research, 100091;2.Institute of Geography, Chinese Academy of Sciences, 100101; 3.Institute of Forest Resource Information Techniques, Chinese Academy of Forestry, 100091: Beijing, China |
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Abstract The evaluation of ecological security is an important part of evaluation for territory resources, it is an important base of synthetic management and utilization and macro control. By studying ecological brittle situation of desertification region which is based Duolun county, results show the ecological security evaluation index system and construct principle , divide groups of coefficient by adopting quantity principle and method, definite coefficient weight by using related degree analysis, and put forward security coefficient and calculated method to measure ecological security. The factors affecting ecological security are soil nutrient, vegetation, moisture and the ground erodibility. The study put forwards indexes to evaluate ecological safety according to magisterial factors and replaceable regular such as organic matter of soil, percentage of plant coverage, rainfall and clayey content. Based on these, the effectiveness of each factor is calculated, and the ecological safety coefficient of the every land-using plot in Duolun County is worked out, and the ecological safe appraisement picture about Duolun County is painted by CIS technique. This research technique can be used for reference in regional ecological safety evaluation.
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Received: 01 April 2003
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