a statistical assessment of the impact of agricultural land use intensity on regional surface water quality at multiple scales统计评估农业土地利用强度的影响在多尺度对区域地表水质量.pdfVIP

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a statistical assessment of the impact of agricultural land use intensity on regional surface water quality at multiple scales统计评估农业土地利用强度的影响在多尺度对区域地表水质量.pdf

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a statistical assessment of the impact of agricultural land use intensity on regional surface water quality at multiple scales统计评估农业土地利用强度的影响在多尺度对区域地表水质量

Int. J. Environ. Res. Public Health 2012, 9, 4170-4186; doi:10.3390/ijerph9114170 OPEN ACCESS International Journal of Environmental Research and Public Health ISSN 1660-4601 /journal/ijerph Article A Statistical Assessment of the Impact of Agricultural Land Use Intensity on Regional Surface Water Quality at Multiple Scales Weiwei Zhang 1, Hong Li 1,*, Danfeng Sun 2 and Liandi Zhou 1 1 Institute of Agricultural Integrated Development, Beijing Academy of Agriculture and Forestry Sciences, No.9 Shu Guang Hua Yuan Middle Road, Beijing 100097, China; E-Mails: zhangwei492@163.com (W.Z.); liandizhou@126.com (L.Z.) 2 College of Natural Resources and Environmental Science, China Agricultural University, Beijing 100094, China; E-Mail: sundf@ * Author to whom correspondence should be addressed; E-Mail: lihsdf@; Tel.: +86-10-5150-3175; Fax: +86-10-8843-0926. Received : 27 August 2012; in revised form: 29 October 2012 / Accepted : 9 November 2012 / Published : 15 November 2012 Abstract: Understanding the effects of intensive agricultural land use activities on water resources is essential for natural resource management and environmental improvement. In this paper, multi-scale nested watersheds were delineated and the relationships between two representative water quality indexes and agricultural land use intensity were assessed and quantif