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- Title
Multi-scale spatial determinants of dissolved oxygen and nutrients in Qiantang River, China.
- Authors
Su, Shiliang; Xiao, Rui; Xu, Xiangyang; Zhang, Zhonghao; Mi, Xiaoya; Wu, Jiaping
- Abstract
This study employed spatial regression to analyze the determinants of dissolved oxygen (DO) and nutrients in the Qiantang River, China. Determinants of their spatial patterns in 1996 and 2003 as well as their dynamics during this time period were characterized at sub-basin and 500-m riparian buffer scales. Results indicated that the determinants differed by variable and by scale. Built-ups, farmland, water body, population density and gross domestic product were positive indicators for nutrient pollution and hypoxia, while distance to river source and forest were negative indicators. Higher slope variability indicates more DO and nutrients. In addition, built-up increases that were accelerated by population growth and economic development accounted for DO and nutrients dynamics to a large extent. This study highlighted that incorporation of spatial autocorrelation into regression was not only a methodological advantage but also a promising management tool.
- Subjects
QIANTANG River (China); CHINA; DISSOLVED oxygen in water; NUTRIENT pollution of water; HYPOXIA (Water); WATER quality; GROSS domestic product
- Publication
Regional Environmental Change, 2013, Vol 13, Issue 1, p77
- ISSN
1436-3798
- Publication type
Article
- DOI
10.1007/s10113-012-0313-6