摘要
[目的]分析2000-2020年渭河流域生态环境质量时空特征及其驱动因素,为该流域实现可持续发展和生态文明建设提供理论参考。[方法]基于GEE平台构建遥感生态指数(RSEI)从而动态评估2000-2020年渭河流域生态环境质量的变化,并基于最优参数地理探测器模型探究气候、植被、地形、土壤和社会经济因子对于生态环境质量的影响。[结果](1)2000-2020年渭河流域生态环境质量不断提升,区域内生态环境质量差异性加大;生态环境质量等级以差和较差为主,占总面积的60%以上。20 a间生态环境质量等级面积增加较多的为中、良和优。(2)生态环境质量等级呈“南高北低,东高西低”的空间分布格局,较差等级生态环境区面积最大,渭河流域73.43%的区域处于生态环境质量增加区,增加区面积达1.21×10^(5) km^(2);研究期间生态环境质量增加的区域面积不断增大,减少的区域面积不断减少,研究区整体生态环境质量在往好的方向发展。优生态环境质量区域总体仍沿东南-西北方向倾斜分布。[结论]降雨量、高程、土壤有机碳含量是影响渭河流域生态环境质量的主要影响因素;在进行渭河流域生态环境质量提升的过程中,应充分考虑坡度的分布规律优化治理方案。
[Objective]The spatial and temporal characteristics of ecological environment quality and its driving factors in the Weihe River basin from 2000 to 2020 was analyzed in order to provide theoretical reference for the sustainable development and ecological civilization construction in the basin.[Methods]The remote sensing ecological index(RSEI)was built based on Google Earth Engine platform to dynamically evaluate the change of ecological environment quality in the Weihe River basin from 2000 to 2020 and the impact of climate,vegetation,terrain,soil and social-economic factors on ecological environment quality was explored based on the optimal parameter geographic detector model.[Results]①From 2000 to 2020,the quality of the Weihe River basin ecological environment continuously improved and the difference in ecological environment quality within the region increased.The ecological environment quality grade was mainly poor and relatively poor,accounting for more than 60% of the total area.In 20 years,the area of ecological environment quality grade increased for medium,good,and excellent.②The quality grade of the ecological environment had a spatial distribution pattern of“higher in the south and lower in the north,higher and lower in the east and the west”.The area of poor grade ecological environment was the largest,and 73.43% of the Weihe River basin was in the area of ecological environment quality increase,with an increase area of 1.21×10^(5)km^(2).During the study period,the area where the ecological environment quality increases was increasing and the reduced area was decreasing,and the overall ecological environment quality of the research area was positively developing.The area with excellent ecological environment quality distributed along the southeast-northwest direction.[Conclusion]Rainfall,elevation,and soil organic carbon content were the main factors affecting the ecological environment quality of the Weihe River Basin.In the process of improving the ecological environment quality of the Weihe River Basin,the distribution law of slope should be fully considered to optimize the governance scheme.
作者
佘欢
李鹏
王孝康
肖列
王周
杨秀玲
宁静
张泽宇
She Huan;Li Peng;Wang Xiaokang;Xiao Lie;Wang Zhou;Yang Xiuling;Ning Jing;Zhang Zeyu(State Key Laboratory of Ecological Water Conservancy in Northwest Dry Region,Xian University of Technology,Xian,Shaanxi 710048,China;Key Laboratory of Ecological Hydrology and Disaster Prevention in Arid Region,State Forestry and Grassland Administration,Xian,Shaanxi 710048,China;Northwest Forestry Survey and Planning Institute of State Forestry and Grassland Administration,Xian,Shaanxi 710001,China;Forestry and Grassland Bureau of Qinghai Province,Xining,Qinghai 810008,China)
出处
《水土保持通报》
北大核心
2025年第1期317-326,共10页
Bulletin of Soil and Water Conservation
基金
陕西省2023年重点研发计划项目“陕西典型地貌单元植被-土壤-水体固碳能力评估与监测关键技术研究”(2023-ZDLSF-65)。
关键词
生态环境质量
遥感生态指数
最优参数地理探测器
驱动因素
渭河流域
ecological environment quality
remote sensing ecological index
optimal parameter geographic detector
drivers
Weihe River basin
