基于生态环境状况指数的兰州市生态环境质量评价

ECO-ENVIRONMENTAL QUALITY EVALUATION FOR LANZHOU BASED ON ECOLOGICAL INDEX

为评价兰州市的生态保持和恢复情况,本文以兰州市地理数据库、遥感影像、行政区划数据为基础,依托遥感数据处理技术手段重点对兰州市植被、水域、农田、建筑用地、大气环境等生态因素进行监测和评价,并形成城市生态环境定期监测,为政府部门制定生态环境决策提供依据。对兰州市2018—2020年生态环境状况进行评价与分析,结果显示:监测期间兰州市生态环境指数由42.47增长到46.78,兰州市环境质量有逐渐变好的趋势;生物丰度、植被覆盖、水网密度值都得到了提升;污染负荷指数则呈现小幅度下降的趋势,表明兰州市环境污染得到了一定的改善。

In order to evaluate the ecological conservation and restoration of Lanzhou,this paper focuses on the monitoring and evaluation of ecological factors such as vegetation,water area,farmland,construction land and atmospheric environment in Lanzhou Based on Lanzhou geographic database,remote sensing image and administrative division data,and forms the regular monitoring of urban ecological environment,It provides a basis for government departments to make ecological environment decisions.The Eco-environmental Status of Lanzhou from 2018 to 2020 is evaluated and analyzed.The results show that during the monitoring period,the eco-environmental index of Lanzhou increases from 42.47 to 46.78,and the environmental quality of Lanzhou tends to get better gradually;The values of biological abundance,vegetation cover and water network density have been improved;The pollution load index shows a slight downward trend,indicating that the environmental pollution in Lanzhou has been improved to some extent.