湖泊科学2026，Vol.38Issue(1)：154-169,中插17,17.DOI:10.18307/2026.0122
土地利用类型、强度和景观格局对河流水质的多尺度影响
Multi-scale impacts of land use type,intensity,and landscape pattern on river water quality
摘要
Abstract
Water quality is a key factor in safeguarding ecosystem functions,protecting human health,and ensuring sustainable de-velopment.The characteristics of land use(including type,intensity,and landscape configuration)are important indicators of hu-man activity and significantly impact river water quality,with these impacts varying across different spatial and temporal scales.This study focuses on the source region of the Chishui River,integrating two spatial scales:the riparian buffer and the sub-water-shed.Using variation partitioning analysis and random forest modelling,we quantify the independent and combined contributions of land use type,intensity and landscape pattern to water quality.This allows us to identify the key influencing factors and their corre-sponding spatial scales.The results show that:Landscape pattern is the main dimension influencing water quality changes(explai-ning 33％-58％of the variation),followed by land use type(11％-22％)and intensity(4％-16％).Riparian landscape config-uration exerts a more significant influence on water quality,while land use intensity at the sub-watershed scale provides stronger ex-planatory power.The proportion of built-up land and the intensities of construction and agriculture are key predictors of water quali-ty,while forest cover and landscape connectivity play important roles in reducing total nitrogen and chemical oxygen demand con-centrations.These findings suggest that water quality management in watersheds should consider land use characteristics at multiple scales in order to identify the most effective combinations of riparian and sub-watershed interventions.Specifically,we recommend prioritizing the control of industrial and domestic point-source pollution at the riparian scale and enhancing agricultural non-point source management at the sub-watershed scale to form an integrated'point-source and non-point source'control system.This study provides new empirical evidence on the multidimensional interactions and scale effects of land use-water quality relationships,offer-ing important theoretical and practical insights for the protection of watershed resources and the optimization of spatial planning.关键词
土地利用/水质/景观格局/土地利用强度/尺度效应/赤水河Key words
Land use/water quality/landscape pattern/land use intensity/scale effect/Chishui River引用本文复制引用
Zhu Jiaying,Peng Shuangyun,Lin Zhiqiang,Yang Yuqian,Zhang Rui,Huang Bangmei..土地利用类型、强度和景观格局对河流水质的多尺度影响[J].湖泊科学,2026,38(1):154-169,中插17,17.基金项目
国家自然科学基金项目(42261073,41971369,42261037)、云南省中青年学术和技术带头人后备人才项目(202305AC160083,202205AC160014)、云南省重大科技专项(202202AD080010)、云南省基础研究面上项目(202401AT070103)和云南省基础研究专项重点项目(202201AS070024,202001AS070032)联合资助. （42261073,41971369,42261037）
