甘肃民勤连古城国家级自然保护区生态环境质量时空变化研究  

Spatio-temporal variations of ecological environment quality in the national nature reserve of Lian Ancient City in Minqin County of Gansu Province

作　　者：张玉霞 汤萃文[1] 郑传贺 苏艳斌 王瑛瑛 ZHANG Yuxia;TANG Cuiwen;ZHENG Chuanhe;SU Yanbin;WANG Yingying(School of Environmental and Municipal Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)

机构地区：[1]兰州交通大学环境与市政工程学院,甘肃兰州730070

出　　处：《林业与生态科学》2025年第1期64-72,共9页Forestry and Ecological Sciences

基　　金：甘肃省科技计划(22JR5RA328)。

摘　　要：连古城保护区是中国西北地区重要的生态保护区之一,其生态环境质量的动态变化对区域生态环境改善和未来规划具有重要意义,故开展对该保护区生态环境质量的监测工作,分析其动态变化的驱动因素,以便保护区有针对性地采取治理措施,促进其可持续发展和生态环境的长期稳定。选取连古城保护区2002-2020年4期LandsatTM/ETM+/OLI时间序列影像为研究数据,耦合绿度(NDVI)、湿度(WET)、干度(NDBSI)、热度(LST)构建综合评价指标体系,利用地理探测器对研究区降水、气温、蒸发量等因素对生态环境质量变化驱动力分析。连古城保护区生态环境质量呈“先下降-后上升-又下降”,RSEI均值总体下降了约25.35%;从生态质量空间变化分布来看,2002-2020年变差的面积和变好的面积分别占总面积的96.72%和3.28%;年均气温和年均降水是影响生态环境质量的主要单因子因素,各因子交互作用均呈增强效果,年均气温和蒸发量交互作用对生态环境质量的解释力最大。连古城保护区在2002-2020年生态环境质量呈下降趋势,驱动力排序为:年平均气温>年平均降水>蒸发量>高程>坡度。Lian Ancient City is one of the most important ecological reserves in the northwestern region of China,and the dynamic change of its ecological environment quality is of great importance for the improvement and future planning of the region's eco-environment,therefore we monitored the ecological quality of the ancient city and analysed the drivers of its dynamic changes in order to offer guidence for making governance measures to promote its sustainable development and long-term ecological stability.The four-phase LandsatTM/ETM+/OLI time sequence images form 2002 to 2020 of the ancient city nature reserve were selected as the study data,and NDVI,WET,NDBSI,LST were adopted to build a comprehensive evaluation indicator system Geo-detectors were used for analyzing the impact of factors like precipitation,temperature and evaporation on ecological environment quality changes of the studied area.The environment quality change in the ancient city protected areas presented the order of"first decreasing-then rising-and then decreased".The average RSEI values fell by about 25.35%overall.In terms of the spatial change distribution of ecological quality,the degraded area and the improved area during 2002-2020 accounted for 96.72%and 3.28%of the total area respectively.Annual average temperature and annual average rainfall were the main single factors affecting the quality of the ecological environment.The interaction of the factors has enhanced over time,and the interactions of the average annual temperature and evaporation quantity had the greatest influence on ecological quality.Therefore,the ecological environment quality of the ancient city protected areas shows a declining trend during 2002-2020,and the order of infulence is:average annual temperature>average annual rainfall>evaporation volume>high range>slope.

关 键 词：生态环境质量 遥感生态指数模型 动态监测 驱动因子 地理探测器 

分 类 号：TP79[自动化与计算机技术—检测技术与自动化装置]