New insight into the correlations between land use and water quality in a coastal watershed of China: Does point source pollution weaken it?
New insight into the correlations between land use and water quality in a coastal watershed of China: Does point source pollution weaken it?
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对中国沿海流域土地利用与水质之间相关性的新见解：点源污染是否会削弱它？
DOI：
10.1016/j.scitotenv.2015.11.063
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发表时间：
2016-02
影响因子：
9.8
通讯作者：
Hong Huasheng
中科院分区：
文献类型：
--
作者：
Zhou Pei;Huang Jinliang;Pontius Robert Gilmore Jr.;Hong Huasheng
揭示土地利用和河流水质之间的关联对于管理流域-海岸连续体中的陆源污染是有用的。然而，目前还不清楚土地利用如何影响水质的背景下，同时点源（PS）污染。在这项研究中，我们开发了一个自组织地图（SOM）为基础的方法来探索闽江流域，中国东南部的土地利用和水质之间的关系。从139个水源子流域的水样与6个土地利用类别，即林地，农业，果园，建成，未使用的土地和水。根据氨氮、硝酸盐氮、总氮、可溶性活性磷酸盐、总磷酸盐和高锰酸钾指数等6个水质参数，将采样点划分为6个聚类。土地利用和水质之间的关系，有足够的样本量的四个集群进一步确定。有没有显着的土地利用-水质相关的四个集群（包括37个子流域）之一。PS污染越严重，土地利用与水质的相关性越不显著。结果表明，PS污染如何削弱土地利用-水质的相关性。该方法可用于判断非点源污染和PS污染对流域水质的影响。
Uncovering the associations between land use and river water quality is useful for managing land-based pollution in the catchment-coast continuum. However, it is not clear how land use affects water quality in the context of simultaneous point source (PS) pollution. In this study, we develop a self-organizing map (SOM)-based approach to explore the relationship between land use and water quality in the Minjiang River Watershed, Southeast China. Water samples from 139 headwater sub-watersheds were associated with six land use categories, namely, Woodland, Agriculture, Orchard, Built-up, Unused land and Water. Sampling sites are delineated into six clusters based on six water quality parameters: ammonium-N, nitrate-N, total nitrogen, soluble reactive phosphate, total phosphate and potassium permanganate index. Local relationships between land use and water quality among four clusters that have sufficient sample sizes are further identified. There is no significant land use-water quality correlation in one of the four clusters (including 37 sub-watersheds). And the greater the PS pollution is, the less significant the land use-water quality correlations are in clusters. The results demonstrate how PS pollution weakens the land use-water quality correlation. Our method can help to determine whether non-point source or PS pollution exerts greater influence on the quality of the water coming from watershed.
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影响因子：
5.8
作者：
Yuyuan Li;J. Jiao;Yi Wang;Wen Yang;Cen Meng;Baozhen Li;Yong Li;Jinshui Wu
通讯作者：
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影响因子：
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作者：
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通讯作者：
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影响因子：
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作者：
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影响因子：
4.6
作者：
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通讯作者：
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DOI：
10.1007/978-3-642-97610-0
发表时间：
1995-04
期刊：
--
影响因子：
--
作者：
T. Kohonen
通讯作者：
T. Kohonen