基于遥感数据的新生态环境指数评价

New ecological index evaluation based on remote sensing data

针对生态环境评价指数获取困难、评价标准各异的问题,本文提出了新生态环境指数(NEI),即以生物丰度指数、植被覆盖指数、干度指标、湿度指标及空气质量指数综合反映区域生态环境状况,并利用主成分分析法客观确定权重。结果表明,NEI的指标选取和结果均与《生态环境状况评价技术规范》中的生态环境指数(EI)具有较强可比性。但NEI指数具有结果量化、可视化及实时化的特点,对于评价区域生态环境状况具有较好的应用前景。

According to the problems of difficulty in obtaining eco-environmental assessment index and different evaluation criteria,a new ecological index(NEI)is put forward.The index synthetically reflects the regional eco-environment status by biological richness index,vegetation coverage index,dryness index,wetness index and air quality index,and uses principal component analysis to objectively determine the weight.The results indicate that NEI’s index selection and results have strong comparability with EI in"Technical Criterion for Ecosystem Status Evaluation".However,the NEI’s index has the characteristics of quantification,visualization and real-time results,and has a good application prospect for evaluating the regional ecological environment.