基于生态环境状况指数的合肥市生态环境质量评价

The Evaluation of the Ecological Environment Quality of Hefei based on the Index of Ecological Environment

生态环境是评价城市的重要指标,应用遥感技术能够快速准确地对城市生态环境进行评价,为城市的环境规划治理提供参考。本文利用生物丰度指数、植被覆盖指数、水体指数、污染负荷指数和人类活动指数五项指数加权求和得到生态环境状况指数(EI),以2013年与2016年的生态环境状况指数定量描述合肥市的生态环境状况。结果表明:研究区整体生态环境良好,平均EI值均大于60,生态优良的区域占35%;位于中心城区的包河区、瑶海区、庐阳区、蜀山区平均EI值相对较低,周边的巢湖市、长丰县、肥西县、肥东县、庐江县平均EI值较高;合肥市2016年的EI值较2013年有所下降,但整体变化不大。

The ecological environment is an important index to evaluate the city.The application of remote sensing technology can quickly and accurately evaluate the urban ecological environment,and provide a reference for urban environmental planning and governance.In this paper,the ecological environment condition index(EI)obtained by weighted summation of five indexes,including biological abundance index,vegetation coverage index,water body in⁃dex,pollution load index and human activity index.The ecological environment condition index(EI)in 2013 and 2016 used to quantitatively describes the ecological environment condition of Hefei city.The results shown that the overall ecological environment of the study area was very good,and the average of the EI values were more than 60,and 35%of the areas had excellent ecological environment.The average EI values of Baohe,Yaohai,Luyang and Shushan districts in the central urban area are relatively low,while those counties of Chaohu,Changfeng,Feixi,Fei⁃dong and Lujiang are relatively high.Compared with that in 2013,the EI value of Hefei in 2016 decreased,but the overall change was not significant.