福贡县生态环境质量遥感动态变化研究

Study on Remote Sensing Dynamic Change of Ecological Environment Quality in Fugong County

以怒江傈僳族自治州福贡县为研究区,选取2000—2020年间10期遥感影像数据源,利用主成分分析法将反演得到的绿度、湿度、热度、干度4个指标进行加权生成RSEI指数,以小流域为评价单元,对福贡县2000—2020年的生态环境质量进行评价。结果表明:福贡县RSEI均值在2000—2020年呈曲折上升趋势,生态环境质量在中等以上的比例总体呈上升趋势;2000—2020年,生态环境质量退化、不变、改善的比例分别为1.17%、56.57%、42.26%,生态环境质量在总体保持稳定的基础上变好,其生态环境质量变好区域主要集中于研究区东、西两侧;研究区气象因素影响植物生长进而对生态环境产生影响,海拔与坡向是影响生态环境质量的主要自然因素,而林地、建设用地及耕地是影响生态环境质量的主要土地利用方式。

Taking Fugong County of Nujiang Lisu Autonomous Prefecture as the study area and using the 10 remote sensing images from 2000 to 2020 as data sources,the principal component analysis method is used to objectively weight the 4 indexes of greenness,humidity,heat,and dryness to generate RSEI,and the small watershed unit was taken as the evaluation unit to evaluate the eco-environmental quality of Fogong County from 2000 to 2020.The results show that the average RSEI of Fogong County shows a tortuous upward trend from 2000 to 2020.The proportion of ecological quality above the medium was generally on the rise;from 2000 to 2020,the proportion of ecological degradation,invariance,and improvement is 1.17%,56.57%,and 42.26%respectively,the eco-environmental quality has improved based on overall stability,and the areas where the eco-environmental quality has improved are mainly concentrated on the east and west sides of the study area;in the study area,meteorological factors affect the ecological environment by affecting plant growth.Elevation and slope direction are the main natural factors that affect the quality of ecological environment,while woodland and cultivated land,as well as construction land,are the main land use ways that affect the quality of ecological environment.