利用遥感和GIS进行四川省生态安全评价研究

四川省生态安全评价对其生态安全建设具有极其重要的意义。为此,该文利用地理信息技术、遥感技术和层次分析技术对四川省的生态安全评价进行了研究。建立了适用于四川省的生态安全评价指标体系,该指标体系由目标、准则和指标三个层次构成。在指标层中包含了反映自然、人文和污染等方面的14个指标,用遥感和GIS获取处理相关指标。利用层次分析法确定各指标的权重,使用GIS建立生态安全评价的相关模型。最后,以市州为单元,利用相关评价模型对自然生态环境状态、人文社会压力安全、环境污染压力安全和区域生态安全等指数进行评价和定级。该研究表明,利用遥感、GIS和AHP能有效地实现区域生态安全评价,且结果可示以图表。

Evaluation of Sichuan Ecological Security Based on Remote Sensing and GIS

Evaluating ecological security is very important to the construction of the ecological security. The technologies of remote sensing (RS), geographical information system (GIS), and analytical hierarchy process (AHP) are used to evaluate Sichuan ecological security. The appraisal index system suitable for Sichuan is created at first, which is composed of three layers such as object, rule, and index. The 14 indexes indicate respectively the status of nature, human culture, society and environmental pollution. The indexes are obtained and calculated by using RS and GIS. The weights of the indexes are determined by using AHP. The relative models are created for evaluating the ecological security. Finally, the indexes of the natural ecological environment, human culture society pressure security, environmental pollution pressure security, and regional ecological security are calculated and graded by using the relative models and GIS. It is shown that: the regional ecological security can be effectively evaluated by using RS, GIS and AHP.