GIS-Based Ecological Sensitivity Evaluation of Huangnan Tibetan Autonomous Prefecture of Qinghai Province
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摘要: 以青海省黄南藏族自治州遥感影像图为数据源,结合实地调查和社会经济等数据,依据该州的生态环境现状,建立生态敏感性评价指标体系,采用层次分析法,在GIS支持下,对该州进行生态敏感性评价。结果表明,黄南藏族自治州的生态敏感性为中度敏感水平,该州西北地区敏感度最高;其中高度敏感区仅占总面积的124%,中度敏感区域占总面积的5735%,轻度敏感区和不敏感区占总面积的4141%;依据评价结果将黄南藏族自治州划分为4个生态功能区。Abstract: Based on remote sensing image data, field investigation and socioeconomic data, according to the local ecological environment situation,take Huangnan Tibetan Autonomous Prefecture (Huangnan) in Qinghai Province as a case for the study to establish ecosensitivity index system in the study area. Applying AHP method and GIS technology,the weight of each factor and ecosensitivity was analyzed and the result showed that Huangnan Prefecture was a moderate ecosensitivity area,the ecosensitivity in the northwest part was higher than the other parts. The area with high ecosensitivity accounted for only 124% of the total area in the prefecture. The area with moderate ecosensitivity and the area with low and no ecosensitivity in Huangnan Prefecture took 5735% and 4141% of the total area respectively.Huangnan Prefecture was divided into four ecological function areas according to the result of the ecological sensitivity assessment,which provide a theoretical basis for future ecological environment construction in Huangnan Prefecture.
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