杨凌区1990-2020年生态环境时空演变分析  

Spatio-temporal Evolution Analysis of Ecological Environment in Yangling District from 1990 to 2020

作　　者：崔阳 孙洪泉 夏积德[1] CUI Yang;SUN Hongquan;XIA Jide(Yangling Vocational and Technical College,Yangling 712100,China;National Institute of Natural Disasters,MEMC,Beijing 100085,China)

机构地区：[1]杨凌职业技术学院,陕西杨凌712100 [2]应急管理部国家自然灾害防治研究院,北京100085

出　　处：《地理空间信息》2024年第6期43-47,共5页Geospatial Information

基　　金：国家重点研发计划资助项目(2017YFC1502402);杨凌职业技术学院科技创新项目(ZK22-27);杨凌职业技术学院教育教学改革研究项目(JG22030)。

摘　　要：基于GEE平台Landsat影像构建了杨凌区1990-2020年的遥感生态指数(RSEI),对生态环境进行监测评估,并结合Sen’s斜率、Mann-Kendall检验和Hurst指数进行时空过程分析。1990-2020年,RSEI均值从0.67降至0.55,先下降后不变,呈现西高东低的空间分布格局;生态质量变差面积从28.6%上升到60.6%,集中在城建区,变差重心东移,变好重心西移;生态环境质量变化趋势稳定,占68.59%,呈现持续性;社会经济发展对研究区生态环境质量存在负面影响,且人口指标的影响较大,得益于生态文明建设,2015年后生态环境状况得到稳定。杨凌区生态环境质量先退化后动态稳定,应控制裸地和建设用地面积,改善该地区生态环境水平。We constructed the remote sensing ecological index(RSEI)based on Landsat images of Google Earth Engine platform from 1990 to 2020 to monitor and evaluate the ecological environment,and combined with Sen’s slope,Mann-Kendall test and Hurst index to analyze the spatio-temporal processes.From 1990 to 2000,the RSEI average declined to 0.55 from 0.67,declining first and then unchanged,showing a spa-tial distribution pattern of high in the west and low in the east.The area of ecological quality deterioration rose from 28.6%to 60.6%,concentrat-ed in the urban construction area,with the gravity center of deterioration shifting eastward and the gravity center of improvement shifting west-ward.The trend of ecological environment quality change is stable,accounting for 68.59%,showing continuity.The socio-economic develop-ment has a negative impact on ecological environment quality in the study area,and the ecological and environmental conditions are stabilized af-ter 2015.The ecological environment quality of Yangling District was first degraded and then dynamically stabilized,and the area of bare land and construction land should be controlled to improve the ecological environment level in the area.

关 键 词：RSEI 生态环境质量 时序分析 Google Earth Engine 杨凌示范区 

分 类 号：P208[天文地球—地图制图学与地理信息工程]