密云水库上游不同空间尺度景观格局指数与水质相关性研究  

Study on the Relationship Between Landscape Patterns Index at Different Spatial Scales and Water Quality in the Upstream Watershed of Miyun Reservoir

作　　者：范霄寒 薛万来 王赛超 李垒 李文忠 刘可暄 朱莎莎[1,2,3] 吴卿 FAN Xiaohan;XUE Wanlai;WANG Saichao;LI Lei;LI Wenzhong;LIU Kexuan;ZHU Shasha;WU Qing(North China University of Water Resources and Electric Power,Zhengzhou 450046;Beijing Water Science and Technology Institute,Beijing 100048,China;Beijing Key Laboratory of Watershed Water Environment and Ecological Technology,Beijing 100048,China)

机构地区：[1]华北水利水电大学,河南郑州450046 [2]北京市水科学技术研究院,北京100048 [3]流域水环境与生态技术北京市重点实验室,北京100048

出　　处：《人民黄河》2024年第11期114-120,共7页Yellow River

基　　金：北京市科技计划课题(Z2211000000112006,Z221100005222013)。

摘　　要：密云水库是北京市重要地表饮用水水源地,开展不同空间尺度景观格局指数与水质相关性分析,可以精准识别水源保护的关键区域。以密云水库上游为研究区域,基于水质监测数据和土地利用数据,利用相关性分析和冗余分析等方法,对2015年、2018年、2020年研究区水质和景观格局指数进行分析,揭示不同空间尺度景观格局指数与水质的相关性,结果表明:密云水库上游不同尺度缓冲区土地利用类型主要为耕地、林地、草地;随着缓冲区半径的增大,景观破碎程度降低、斑块数量逐渐增多、不同类型斑块之间的分离程度逐渐提高;不同尺度缓冲区优势景观连通性差别不大,景观组成丰富度和均匀度接近;除TN外,研究区其余水质指标基本达到地表水Ⅱ类水质标准;半径为2000 m的缓冲区景观格局指数对水质的解释度最高,2000 m缓冲区是改善水质的关键区域。As the largest surface drinking water source in Beijing,the correlation analysis between landscape pattern index and water quality at different spatial scales can better guide the protection of water sources in Miyun Reservoir.Taking the upper watershed of Miyun Reservoir as the study area,based on the water quality monitoring data and land use data,and utilizing the landscape pattern index method,correlation analysis and redundancy analysis,we analyzed the characteristics of the water quality change and the landscape pattern index change in the upper watershed of Miyun Reservoir in 2015,2018 and 2020,to reveal the correlation between the landscape pattern of the upper watershed of Miyun Reservoir and the water quality at different spatial scales.correlation.The results show that:the land use types in the buffer zone at different scales in the upper Miyun Reservoir watershed are mainly cropland,woodland and grassland.As the scale of the buffer zone increa-ses,the degree of landscape fragmentation decreases,the number of patches gradually increases.The degree of complexity gradually increa-ses,and the degree of separation between different types of patches gradually increases.There is not much difference in the connectivity of the dominant landscapes in the buffer zones at different scales,and the richness and homogeneity of the landscape composition is close.Ex-cept for TN,the water quality indicators of the upstream watershed basically meet the water quality standard of surface water classⅡ.Redun-dancy analysis reveals that the landscape pattern index in the 2000 m buffer zone has the strongest ability to explain water quality.The 2000 m buffer zone is a key area for improving water quality in the future.

关 键 词：水质 景观格局指数 相关性分析 密云水库上游 

分 类 号：TV211.1[水利工程—水文学及水资源]