基于遥感生态指数的祖厉河流域生态环境变化特征分析

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中图分类号 X821 文献标志码A 文章编号 1007-7731（2026）07-0066-05

DOI号10.16377/j.cnki.issn1007-7731.2026.07.017

Analysis of ecological environment changes characteristics in the Zuli River Basin based on theremote sensing ecological index

Tan Minshan1Gao Zhichao1Wang Yibo²Liang Lixia³ （Gansu Institute of Soil and Water Conservation Sciences，Lanzhou 73oooo， China; 2 College of Earth and Environment Sciences，Lanzhou University，Lanzhou 73oooo， China; 3Gansu Water Resources Trade Union Working Committee， Lanzhou 73oooo， China）

AbstractUsing Landsat series satelite imagery data，this study constructed a remote sensing ecological index （RSEI） by integrating remote sensing indicators including greenness，wetness，dryness，and salinity toanalyzethe spatiotemporalevolutionandspatial heterogeneitycharacteristics of theecological environment intheZuli RiverBasin from 2001to 2O21.Theresultsof principal componentanalysis showed thatthe variancecontributionrates of the first principalcomponentforthefouricators（geess，wetss，ss，ndsinity）ino，14dall exceeded 8O%，indicating that th first principal component efectivelycaptured mostof the characteristic information of these indicators throughoutthe study period.The results demonstrated that the mean RSEIvalues in the basin were 0.316，0.307，.468，and0.662in2001，2007，2014，and2021respectivelyexhbitingatrendof initialdeclinefollowed byanincrease.During the research period，thearea with“good”ecological environment qualitygrade gradually expanded， accounting for 96.75% of the total basin area in 2O21， while the“poor” grade area progressively decreased. Spatially，regionswith“excellent”ecological quality wereprimarily distributed inrivervalleysandupstream mountainous areas in the southwestern partofthe basin，whereasareas with inferior ecological conditions were mainly concentrated in northern mountainous regions.In conclusion，the Zuli River Basin hasachieved significant improvement in overallecological environment qualityduringthe study period.This study provides areference for furtheroptimizingecological environment protection strategies in the area.

Keywords RSEI; ecological environment; principal component analysis; spatial-temporal change

生态环境通过资源供给、气候调节及文化支持等功能，构成社会经济运行的基础支撑系统[1-2]。（剩余7407字）