基于遥感和GIS技术的青海湖环湖地区生态环境脆弱性评价

以青海湖环湖地区为研究区,从生态环境脆弱性的影响因子和脆弱性形成的结果表现入手,通过遥感与GIS技术提取出8项生态因子包括植被指数、土壤亮度和土壤湿度指数、高程和坡度以及气温降水和土地利用作为评价指标,利用层次分析法（AHP）计算各评价指标的权重,然后计算研究区综合脆弱度,并根据统计结果将脆弱度的大小划分为微度脆弱、轻度脆弱、中度脆弱和重度脆弱4个不同等级。结果表明：研究区轻度脆弱和中度脆弱所占面积比例较大,分别占到研究区陆地面积的35.2%和40.7%,说明该区总体环境质量较好。

Eco-environmental Vulnerability Analysis around Qinghai Lake Based on RS and GIS Technology

In this study, the area around Qinghai Lake was taken as the study area. According to the main reason of the formation of eco-environment and its result, eight evaluation indexes (including vegetation index, soil luminance and soil moisture, DEM and slope, temperature, precipitation and land use) were set up based on RS and GIS technology. The weight for every evaluation index was calculated with AHP method. The study area can be marked as four degree with qualitative and quantitative analysis: tiny vulnerability, little vulnerability, middle vulnerability and heavy vulnerability. The results showed that the areas in little vulnerability and middle vulnerability account for 35. 2% and 40. 7% respectively. It was concluded that the current status of the integral eco-environment quality of the research area are affirmative. It could provide theoretics for the governance to protect and formulate regional management by this research.