4.7 Article

Application of self-organizing map (SOM)-based approach to explore the relationship between land use and water quality in Deqing County, Taihu Lake Basin

期刊

LAND USE POLICY
卷 119, 期 -, 页码 -

出版社

ELSEVIER SCI LTD
DOI: 10.1016/j.landusepol.2022.106205

关键词

Land use; Spatial scale; Water quality; Spatial pattern; Self-organizing map; Point source pollution

资金

  1. National Key Research and Development Program of China [2019YFC1408201-03, PLASTPOLL 275172]

向作者/读者索取更多资源

Characterizing the spatial patterns of surface water quality is important for water resources management. This study uses a self-organizing map approach to explore the relationship between land use and water quality in Deqing County, Zhejiang Province. The results show that point source and non-point source pollution have different influences on water quality in different clusters.
Characterizing the spatial patterns of surface water quality is of great significance for water resources management and protection. A great number of studies have addressed the fact that water quality is often subjected to surrounding land use patterns, but the relationship between them remains obscure. In this study, we develop a self-organizing map (SOM)-based approach to explore the relationship between land use and water quality in Deqing County, Zhejiang Province, which locates in the hinterland of the Yangtze River Delta in the Taihu Lake Basin. Water samples were collected from 163 streams, ponds or lakes and then clustered into six groups based on five water quality variables: pH, ammonium-N, total phosphate, dissolved oxygen and permanganate index using the SOM approach. The proportion of eight land use categories, which are forest, cropland, shrubland, grassland, water, wetland, impervious land and bare land were associated with water quality to explain its spatial variation. The altitude decreases from west to east and the eastern part of Deqing County is characterized by floodplain and streams network, which makes watershed delineating real hard work. Therefore polder and multiple buffer scales were considered to carry out the spatial discretization process. For land use parameters, sub-watershed scale was surpassing buffer scale in the elevated area, but only buffer scale can be applied in the whole area. Polders totally failed to reveal the relationship between land use and water quality. Our results demonstrate whether point source (PS) or non-point source (NPS) pollution exerts greater influence on water quality in different clusters. The methods and the results demonstrated in this research can help local government improve water resources and land use management strategies practically.

作者

我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。

评论

主要评分

4.7
评分不足

次要评分

新颖性
-
重要性
-
科学严谨性
-
评价这篇论文

推荐

暂无数据
暂无数据