Spatial-Temporal Variations of Water Quality and Its Relationship to Land Use and Land Cover in Beijing, China

被引:51
作者
Chen, Xiang [1 ,2 ]
Zhou, Weiqi [1 ,2 ]
Pickett, Steward T. A. [3 ]
Li, Weifeng [1 ]
Han, Lijian [1 ]
机构
[1] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, State Key Lab Urban & Reg Ecol, 18 Shuangqing Rd, Beijing 100085, Peoples R China
[2] Univ Chinese Acad Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China
[3] Cary Inst Ecosyst Studies, 2801 Sharon Turnpike, Millbrook, NY 12545 USA
基金
中国国家自然科学基金;
关键词
water quality; land use and land cover; non-point source pollution; scale; Beijing; NONPOINT-SOURCE POLLUTION; RELATING LANDSCAPE CHARACTERISTICS; STORMWATER RUNOFF QUALITY; FORESTED WATERSHEDS; SURFACE WATERS; BUFFER STRIPS; LONG-TERM; URBAN; STREAM; PATTERN;
D O I
10.3390/ijerph13050449
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Rapid urbanization with intense land use and land cover (LULC) change and explosive population growth has a great impact on water quality. The relationship between LULC characteristics and water quality provides important information for non-point sources (NPS) pollution management. In this study, we first quantified the spatial-temporal patterns of five water quality variables in four watersheds with different levels of urbanization in Beijing, China. We then examined the effects of LULC on water quality across different scales, using Pearson correlation analysis, redundancy analysis, and multiple regressions. The results showed that water quality was improved over the sampled years but with no significant difference (p > 0.05). However, water quality was significantly different among nonurban and both exurban and urban sites (p < 0.05). Forest land was positively correlated with water quality and affected water quality significantly (p < 0.05) within a 200 m buffer zone. Impervious surfaces, water, and crop land were negatively correlated with water quality. Crop land and impervious surfaces, however, affected water quality significantly (p < 0.05) for buffer sizes greater than 800 m. Grass land had different effects on water quality with the scales. The results provide important insights into the relationship between LULC and water quality, and thus for controlling NPS pollution in urban areas.
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页数:17
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