摘要:
为了解安宁河流域生态环境脆弱性情况,以卫星遥感图像作为主要信息源,以人口密度、国内生产总值、土地利用、土壤类型、高程、坡度、气温、降水、植被指数作为评价指标,综合运用地理信息系统技术和投影寻踪算法,构建空间投影寻踪模型,进而对安宁河流域生态环境脆弱性进行评价。以分析结果为依据,将研究区生态环境脆弱性划分为5个等级,分别是重度脆弱、中度脆弱、轻度脆弱、微度脆弱和潜在脆弱。研究结果表明,研究区生态脆弱性整体上属中等脆弱等级。由于生态环境保护政策的实施和地区人民对于生态环境保护意识的提高,研究区2013年相对于1993年,生态环境总体有所改善。
Abstract:
In this study, the authors used satellite remote sensing image as the primary source of information while collecting additional data, and selected some indicators as assessment indexes such as population density, gross domestic product ( GDP) , land use, soil type, elevation, slope, temperature, precipitation, and vegetation index. Eco-environment vulnerability of Anning River Basin was evaluated by using the space projection pursuit model built by GIS technology and the projection pursuit algorithm. According to analytical results, eco-environmental vulnerability degrees in the study area were divided into five grades, i. e. , heavy, medium, light, slight and potential. Through analyzing the evaluation results of environmental vulnerability in 1993 and 2013, the ecological vulnerability of the study area was moderate vulnerability on the whole. Due to the enforcement of the national policy and the improvement of people’s awareness of environmental protection, the overall ecological environment was improved from 1993 to 2013 in the study area.
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