水土保持研究2024，Vol.31Issue(1)：373-384,12.DOI:10.13869/j.cnki.rswc.2024.01.024
基于RSEI的黄河中游地区生态环境质量时空演化特征及驱动因素
Spatiotemporal Variation of Ecological Environmental Quality and Its Response to Different Driving Factors in the Section of Yellow River Basin in Recent 31 Years
摘要
Abstract
[Objective]Ecological environment quality assessment is an important basis for ecological environ-ment protection and ecological civilization construction in the middle reaches of the Yellow River.Exploring the dynamic of ecological environment quality and the influence of different leading factors on it can provide a theoretical basis for the coordinated development of ecological environment protection strategy and economic development strategy.[Methods]Based on remote sensing ecological index,Sen trend analysis,Manna-Kendall mutation point test,coefficient of variation and Hurst method were used to analyze the past and future evolution characteristics of ecological environment of Yan'an City in the middle reaches of the Yellow River from 1990 to 2020.The sensitivity of RSEI to different driving factors at different stages was investiga-ted by using random forest and structural equation model.[Results](1)In recent 31 years,the ecological environment quality of Yan'an City showed a good trend.Among them,the indexes of greenness and humidi-ty were increasing,and the indexes of heat and dryness were decreasing,which jointly promoted the change of ecological environment quality in Yan'an City.(2)RSEI showed an upward trend before 1995,a down-ward trend during 1995-2001,and an increasing trend after 2001.(3)The RSEI changes from 1990 to 1995 belonged to high volatility changes,the RSEI changes from 1996 to 2001 were mainly high volatility chan-ges,and the RSEI changes from 2002 to 2020 belonged to low volatility changes.RSEI will show a large area of decline in the coming period of time.(4)During 1990-1995,RSEI was positively affected by extremely low daily minimum temperature,and negatively affected by extremely high daily maximum temperature,extremely low daily maximum temperature and drought.The positive effect of land use on RSEI was the greatest during 1996-2001,and the very low daily maximum temperature,drought and the very low daily minimum temperature had the greatest negative effect on RSEI.From 2002 to 2020,the 5-day maximum rainfall had the greatest negative impact on RSEI,and the very low daily maximum temperature,the very high daily maximum temperature and the very low daily minimum temperature had little negative impact on RSEI,but they all had an impact on the 5-day maximum rainfall and thus had a greater indirect impact on RSEI.This study can provide practical reference and theoretical support for the assessment and improvement of ecological environment quality in Yan'an City.[Conclusion]In recent 31 years,the ecological environment quality of Yan'an City had shown an overall increasing trend,but the ecological degradation caused by climate change needs to attract the attention of the government,and put forward a series of ecological resto-ration measures as soon as possible to prevent the further deterioration of its ecological environment.关键词
生态环境质量/人类活动/地形/气候/黄河中游地区/延安市Key words
ecological environmental quality/land use/topographic/climate/Yellow River Basin/Yan'an City分类
信息技术与安全科学引用本文复制引用
薛桦,刘萍..基于RSEI的黄河中游地区生态环境质量时空演化特征及驱动因素[J].水土保持研究,2024,31(1):373-384,12.基金项目
山西省重点研发计划项目"山西省黄河流域生态保护大数据应用研究"(202202020101007) （202202020101007）
