基于改进遥感生态指数的淮河流域生态环境质量演变研究

Study on the Changes of Ecological Environment Quality in Huai River Basin Based on Improved Remote Sensing

淮河流域作为中国重要的经济区域,其生态环境问题一直备受关注.基于Google Earth Engine平台,选取2000-2023年的MODIS影像,提取绿度、湿度、干度、热度等4个生态指标进行耦合,构建改进的遥感生态指数(MRSEI).对淮河流域2000-2023年的生态环境质量变化进行评估,并结合地理探测器分析了自然条件对生态环境的影响.结果表明:2000-2023年淮河流域的生态环境质量呈现先下降后上升的趋势.2000-2023年淮河流域生态环境质量变好的面积占比38.50%,变差的面积占比27.75%.东部地区生态环境质量较稳定,中、西部地区稳定性较差.地理探测器的分析结果显示,干度是驱动研究区生态环境质量变化的主要影响因子,其次是绿度.

As an important economic region in China,the Huai River Basin has always attracted much attention for its ecological and environmental issues.Based on the Google Earth Engine platform,this paper selects MODIS images from 2000 to 2023,extracting four ecological indicators of greenness,wetness,dryness,and heat to construct a Modified Remote Sensing Ecology Index(MRSEI).Meanwhile,the changes in ecological environment quality in the Huai River Basin from 2000 to 2023 are evaluated,and the impacts of natural conditions on the ecological environment are analyzed using a geographical detector.The results show that:From 2000 to 2023,the ecological environment quality of the Huai River Basin showed an overall trend of rising and then declining;From 2000 to 2023,the area with improved ecological environment in the Huai River Basin accounted for 38.50%,while the area with deteriorated environment accounted for 27.75%.The ecological environment quality in the eastern region was relatively stable,while the quality in the central and western regions was less stable;With the geographical detector,the results showed that dryness was the main influencing factor to drive the change of ecological environment quality in the study area,followed by greenness.