基于GIS的临汾市生态环境质量状况及动态评价

Dynamic Evaluation of Ecological Quality in Linfen City Based on GIS

根据生态环境状况评价技术规范,对2015—2019年临汾市生态环境状况进行动态评价,评价结果表明:2019年,临汾市生态环境状况等级为“一般”,各县域中除安泽县为“良”外,其他县域生态环境状况等级均为“一般”;临汾市东、南、西、北、中5个区域植被覆盖指数及土地胁迫指数差异较大。与2015年相比,2019年临汾市生态环境质量无明显变化,各县域中除侯马市、尧都区生态环境质量略有变化外,其他县域无明显变化。2015—2019年,植被生物丰度指数、水网密度指数逐年都保持相对稳定,土地胁迫指数变化幅度不明显,植被覆盖指数是制约临汾市EI提升的关键因子,为生态环境保护管理提供支撑。

According to the technical specification of ecological environment status evaluation,the ecological environment status of Linfen City from 2015 to 2019 is dynamically evaluated.The evaluation results show that in 2019,the ecological environment status of Linfen city is“general”,and the ecological environment status of other counties is“general”except Anze County;There are great differences in vegetation cover index and land stress index in the East,South,West,North and middle of Linfen City.Compared with 2015,there is no significant change in the eco-environmental quality of Linfen City in 2019,and there is no significant change in other counties except Houma City and Yaodu District.From 2015 to 2019,vegetation biological abundance index and water network density index remained relatively stable year by year,and the change range of land stress index was not obvious.Vegetation cover index is the key factor restricting the improvement of EI in Linfen City,providing support for ecological environment protection and management.