Development of a large-scale remote sensing ecological index in arid areas and its application in the Aral Sea Basin  

作　　者：WANG Jie LIU Dongwei MA Jiali CHENG Yingnan WANG Lixin 

机构地区：[1]School of Ecology and Environment,Inner Mongolia University,Hohhot 010021,China

出　　处：《Journal of Arid Land》2021年第1期40-55,共16页干旱区科学（英文版）

基　　金：This work was funded by the National Natural Science Foundation of China(U1603242);the Major Science and Technology Projects in Inner Mongolia,China(ZDZX2018054).

摘　　要：The Aral Sea Basin in Central Asia is an important geographical environment unit in the center of Eurasia.It is of great significance to the ecological protection and sustainable development of Central Asia to carry out dynamic monitoring and effective evaluation of the eco-environmental quality of the Aral Sea Basin.In this study,the arid remote sensing ecological index(ARSEI)for large-scale arid areas was developed,which coupled the information of the greenness index,the salinity index,the humidity index,the heat index,and the land degradation index of arid areas.The ARSEI was used to monitor and evaluate the eco-environmental quality of the Aral Sea Basin from 2000 to 2019.The results show that the greenness index,the humidity index and the land degradation index had a positive impact on the quality of the ecological environment in the Aral Sea Basin,while the salinity index and the heat index exerted a negative impact on the quality of the ecological environment.The eco-environmental quality of the Aral Sea Basin demonstrated a trend of initial improvement,followed by deterioration,and finally further improvement.The spatial variation of these changes was significant.From 2000 to 2019,grassland and wasteland(saline alkali land and sandy land)in the central and western parts of the basin had the worst ecological environment quality.The areas with poor ecological environment quality are mainly distributed in rivers,wetlands,and cultivated land around lakes.During the period from 2000 to 2019,except for the surrounding areas of the Aral Sea,the ecological environment quality in other areas of the Aral Sea Basin has been improved in general.The correlation coefficients between the change in the eco-environmental quality and the heat index and between the change in the eco-environmental quality and the humidity index were–0.593 and 0.524,respectively.Climate conditions and human activities have led to different combinations of heat and humidity changes in the eco-environmental quality of the Aral Sea Basin.Howev

关 键 词：eco-environmental quality arid remote sensing ecological index Moderate Resolution Imaging Spectroradiometer(MODIS) landscape changes remote sensing monitoring Central Asia 

分 类 号：P901[天文地球—自然地理学] X87[环境科学与工程—环境工程]