基于SA-RSEI模型的盐池县生态质量演变研究  

The evolution of ecological quality in Yanchi Countybased on the SA-RSEI model

作　　者：侯嘉烨 李建华[1,2] 王佳蓉 马海涛 强泽楷 樊新刚 HOU Jiaye;LI Jianhua;WANG Jiarong;MA Haitao;QIANG Zekai;FAN Xingang(College of Geography and Planning,Ningxia University,Yinchuan 750021,Ningxia,China;College of Geographic Information Modern Industry,Ningxia University,Yinchuan 750021,Ningxia,China;Nuclear Geological Survey Institute of Ningxia Hui Autonomous Region,Yinchuan 750021,Ningxia,China;College of Economics and Management,Ningxia University,Yinchuan 750021,Ningxia,China)

机构地区：[1]宁夏大学地理科学与规划学院,宁夏银川750021 [2]宁夏大学地理信息现代产业学院,宁夏银川750021 [3]宁夏回族自治区核地质调查院,宁夏银川750021 [4]宁夏大学经济管理学院,宁夏银川750021

出　　处：《干旱区研究》2024年第6期1045-1058,共14页Arid Zone Research

基　　金：国家自然科学基金项目(42161050)资助。

摘　　要：为探究盐池县生态环境时空动态变化特征和驱动因素,基于2000—2020年5期Landsat遥感数据,利用改进遥感指数(SA-RSEI),结合Sen+Mann-Kendall、Hurst指数分析盐池县生态环境质量时空变化格局及变化趋势,并利用地理探测器探究盐池县生态环境质量的驱动因子。结果表明:(1)2000—2020年盐池县SA-RSEI呈先下降后上升的趋势;(2)盐池县生态环境质量在21 a间呈先退化、后恢复的演变过程,空间分布格局由南部较差,北部良好逐渐转变为东南部良好,西北部较差;(3)21 a间盐池县生态环境质量总体呈缓慢退化趋势,但退化程度逐渐降低,生态环境改善程度在2020年后会逐渐增大。(4)沙度指数、降水、高程,以及GDP是区域生态环境质量空间分异的主要影响因子。(5)所有因子间的交互作用均为增强效应,沙度指数、气温、降水以及高程与其他探测因子的交互作用起主导作用,且经济因素对SA-RSEI的影响力逐渐增大。This study explored the characteristics and driving factors of the dynamic spatio-temporal changes in the ecology and environment in Yanchi County by using remote sensing images from 1990 to 2020 as the data source and the SA-RSEI as a basis.By combining the Theil-Sen Median analysis,Mann-Kendall significance test,and Hurst index,the pattern of spatiotemporal variations in the ecological and environmental quality of Yanchi County was analyzed.The driving factors of this quality were explored by employing the Geography Detector.The results showed that(1)SA-RSEI initially reduced and then enhanced from 2000 to 2020.(2)The ecological and environmental quality showed an evolutionary process of“initial degradation and then recovery”during these 21 years.The spatial distribution pattern gradually changed from“poor in the south and good in the north”to“good in the southeast and poor in the northwest.”(3)During the 21 years,the ecological and environmental quality of Yanchi County generally degraded,but the degree of degradation gradually reduced,and the degree of ecological and environmental improvement gradually increased after 2020.(4)DI,precipitation,elevation,and GDP are the main factors influencing the spatial variation in regional ecological quality.(5)The interaction between DI,temperature,precipitation,elevation,and other detection factors plays a leading role;the influence of economic factors on SA-RSEI gradually enhances.

关 键 词：生态质量评价 改进生态指数 地理探测器 HURST指数 盐池县 

分 类 号：X321[环境科学与工程—环境工程]