Dissolved Inorganic Nitrogen Changes in Upper Reaches of Daling River in China

Author

Wu, Huixiu ; Jiang, Cuiling ; Du, Zhong

Author_Institution

Coll. of Hydrol. & Water Resources, Hohai Univ., Nanjing, China

fYear

2010

fDate

18-20 June 2010

Firstpage

1

Lastpage

4

Abstract

Data from 3 monitoring stations in the upper reaches of the Daling River from 1985 to 2007 reveal an obvious increasing trend in the concentrations of NH₄-N, NO₂-N and NO₃-N. The average annual concentrations of NH₄-N, NO₂-N and NO₃-N increased from 0.69 mgL^-1, 0.006mgL^-1, 1.14 mgL^-1 in 1985 to 3.01 mgL^-1, 0.210 mgL^-1, 6.57 mgL^-1 in 2007. The highest concentrations of NH₄-N, NO₂-N and NO₃-N during past 20 years were found in the Habaqi station, being 18.00mgL^-1, 3.230mgL^-1, 16.30mgL^-1. The highest concentrations of NH₄-N, NO₂-N and NO₃-N of each station occurred mostly in dry season. With the increasing flow in the upper reaches of the Daling River, the concentrations of NH₄-N, NO₂-N and NO₃-N decreased except NH₄-N and NO₂-N increased in the Chaoyang station.

Keywords

environmental factors; nitrogen compounds; rivers; water quality; AD 1985 to 2007; Chaoyang station; China; Daling river; Habaqi station; NH₄; NO₂; NO₃; dissolved inorganic nitrogen changes; dissolved inorganic nitrogen concentration; Chaos; Cities and towns; Educational institutions; Environmental economics; Environmental factors; Hydrology; Monitoring; Nitrogen; Rivers; Water resources;

fLanguage

English

Publisher

ieee

Conference_Titel

Bioinformatics and Biomedical Engineering (iCBBE), 2010 4th International Conference on

Conference_Location

Chengdu

ISSN

2151-7614

Print_ISBN

978-1-4244-4712-1

Electronic_ISBN

2151-7614

Type

conf

DOI

10.1109/ICBBE.2010.5515094

Filename

5515094