Spatial-temporal characteristics of nitrogen degradation in typical Rivers of Taihu Lake Basin, China.

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ID: 83061
2020
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Abstract
In this study, we focus on the measurement of different nitrogen (N) forms and investigate the spatial-temporal variability of degradation coefficient in river channels. We aim to provide a new approach of deriving in-situ degradation coefficients of different N forms, and highlight factors that determine the spatial-temporal variability of degradation coefficients. Our results are based on a two-year field survey in 34 channels around the Taihu Lake Basin, eastern China. The derived degradation coefficients of different N forms based our newly-developed experimental device are: degradation coefficients of TN, NH-N and NO-N range from 0.006-0.449 d, 0.022-1.175 d and -0.096-2.402 d, respectively. The degradation coefficients of N show strong dependence on N concentration and water temperature. The seasonal difference of water temperature and N concentration leads to spatial-temporal variability of degradation coefficients. The derived degradation coefficients of N are further verified through one-dimensional water quality model simulations. The degradation coefficient obtained in this study and the influencing factors of its spatial-temporal variability provide invaluable reference for studies in aquatic environment.
Reference Key
guo2020spatialtemporalthe Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Guo, Jiaxun;Wang, Lachun;Yang, Long;Deng, Jiancai;Zhao, Gengmao;Guo, Xiya;
Journal The Science of the total environment
Year 2020
DOI
S0048-9697(19)36452-6
URL
Keywords
urbanization dissolved inorganic nitrogen degradation spatial-temporal variation taihu lake basin

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