基于遥感生态指数的贵池区生态环境时空变化研究

Study on the Spatiotemporal Change of Ecological Environment in Guichi District Based on Remote Sensing Ecological Index

多方位掌握地区生态环境质量以及空间分布变化,可为区域生态环境监测与治理提供重要参考价值。本文基于Landsat8遥感影像,分别提取了绿度、湿度、热度和干度4项指标,通过主成分分析集成构建遥感生态指数(RSEI),定量分析贵池区2013-2018年生态环境质量以及时空变化。结果表明:2013年和2018年研究区RSEI均值分别为0.518、0.427,生态环境质量整体呈下降趋势;2013-2018年,RSEI主要向正负一级转变,生态环境质量改善和恶化面积分别占总面积的21.48%、40.69%。改善的区域主要分布在研究区西部,而恶化区域整个区域都有所分布。

To master the quality and spatial distribution of regional ecological environment in multiple aspects can provide important reference value for regional ecological environment monitoring and management.Based on Landsat 8 remote sensing image,this paper extracts 4 indexes of green degree,humidity,heat degree and dryness degree respectively,constructs remote sensing ecological index(rsei)through principal component analysis integration,and quantitatively analyzes the ecological environment quality and spatio-temporal change of Guichi District in 2013-2018.The results show that the average value of rsei in 2013 and 2018 is 0.518 and 0.427 respectively,and the overall ecological environment quality shows a downward trend;from 2013 to 2018,rsei mainly changes to positive and negative level,and the area of ecological environment quality improvement and deterioration accounts for 21.48%and 40.69%of the total area respectively.The improved areas are mainly distributed in the west of the study area,while the deteriorated areas are distributed in the whole area.