摘要
黄河上游流域作为黄河的水源地是中国重要的生态功能区,分析黄河上游流域的生态环境质量变化对于黄河流域的生态保护和经济高质量发展具有重要意义。本文基于Google Earth Engine平台,通过遥感生态指数(Remote Sensing Ecological Index,RSEI)对2000—2021年黄河上游流域的生态环境质量进行动态分析。结果表明:(1)黄河上游流域RSEI呈提升态势,并且具有阶段性的特点,2000—2005年为生态环境质量恶化阶段,2006—2021年为生态环境质量改善阶段。生态环境质量总体处于较差和中等水平,占区域总面积的64.78%。(2)不同河段生态环境质量存在显著的空间异质性,其中河源段的生态环境质量最好,冲积平原段的生态环境质量最差。(3)黄河上游流域生态环境质量空间集聚特征显著,高-高集聚区稳定分布于河源段附近,低-低集聚区分布在人类活动强度较大的峡谷段和冲积平原段。(4)绿度、湿度、热度和干度均对黄河上游地区生态环境质量产生显著影响,其中绿度为主导驱动因子,干度为次要驱动因子。植被覆盖度的增加、气候调节和人类活动对黄河上游流域生态环境改善有明显的促进作用。
As the water source of the Yellow River,the upper Yellow River basin is an important ecological function area in China.Analysis of ecological environmental quality changes in the upper Yellow River basin is important for ecological protection and high-quality economic development of the Yellow River basin.Based on Google Earth Engine platform,this paper analyzes the change of ecological environment quality in the upper Yellow River basin from 2000 to 2021 through remote sensing ecological index(RSEI).The results show that:(1)The RSEI of the upper Yellow River basin is elevated.At the same time,it has the characteristics of stages.2000-2005 is the stage of deterioration of ecological environment quality,and 2006-2021 is the stage of improvement of ecological environment quality.It is poor and moderate,accounting for 64.78%of the total area of the region.(2)The ecological quality of different river sections is different significantly,with the best ecological quality in the river source section and the worst ecological quality in the alluvial plain section.(3)The spatial clustering characteristics of ecological environment quality in the upper Yellow River basin are obvious,where high-high clustering areas are stably distributed near the river source section and low-low clustering areas are distributed in the canyon section and alluvial plain section where the intensity of human activities is higher.(4)Greenness,humidity,heat and dryness all have significant effects on the ecological quality of the upper Yellow River basin,with greenness as the dominant driver and dryness as the secondary driver.The increase of vegetation cover,climate regulation and soil and water conservation have significantly contributed to the ecological improvement of the upper Yellow River basin.
作者
崔亚婷
李嬛
郑龙啸
吴孟泉
Cui Yating;Li Huan;Zheng Longxiao;Wu Mengquan(School of Resources and Environmental Engineering,Yantai 264025,Shandong,China;School of Business,Ludong University,Yantai 264025,Shandong,China)
出处
《中国沙漠》
CSCD
北大核心
2023年第3期107-118,共12页
Journal of Desert Research
基金
高分辨率对地观测系统国家科技重大专项(79-Y50-G18-9001-22/23)
国家自然科学基金项目(42071385)
山东省自然科学基金项目(ZR2021MD089)
山东省海上航天装备技术创新中心基金项目(MAETIC2021-12)
烟台市科技创新发展计划重点研发类基金项目(2022MSGY062)。
