基于Google Earth Engine遥感云平台的生态环境质量动态监测——以川西高原为例

Dynamic monitoring of ecological environment quality based on Google Earth Engine remote sensing cloud platform taking Western Sichuan Plateau as an example

以2001—2023年MODIS卫星探测资料为依托,定量考查了绿度、湿度、热度和干燥度4项指标,应用主成分分析法,构建了遥感生态评价指数(RSEI)。探讨并解读了四川省西部高原(简称川西高原)地带生态环境的质量状态及其演变动向,并对该区域的生态处境进行了深入评价与分析。结果表明,绿度、湿度对生态环境质量起促进作用。研究区整体生态质量呈现先上升后下降的趋势,2013年RSEI值达到最高,后来呈轻微下降趋势,但是整体生态环境质量呈现略微上升的趋势。2001—2023年生态环境显著恶化和轻微恶化的面积占总面积不足0.01%,而轻微变好和显著变好的面积占比56.82%。总体来说,2001—2023年川西高原的生态环境质量逐步得到改善。

Utilizing data from MODIS remote sensing imagery spanning 2001 to 2023,four indicators of greenness,humidity,heat,and dryness were quantitatively examined.Principal component analysis method was applied to construct remote sensing ecological evaluation index(RSEI).Quality status and evolution trend of ecological environment in the western plateau of Sichuan Province(referred to as the Western Sichuan Plateau)were explored and interpreted,and in-depth evaluation and analysis of ecological situation in the region was conducted.Results indicated that greenness and humidity had a promoting effect on quality of ecological environment.Overall ecological quality of research area showed a trend of first increasing and then decreasing.The RSEI value reached its highest point in 2013 and then showed a slight downward trend,but overall ecological environment quality showed a slight upward trend.The area of significant and slight deterioration of ecological environment from 2001 to 2023 accounted for less than 0.01%of total area,while the area of slight and significant improvement accounted for 56.82%.Overall,ecological environment quality of Western Sichuan Plateau has gradually improved from 2001 to 2023.