Dynamics of Water Quality in the Middle and Lower Reaches of the Weihe River

Abstract:

The Weihe River is an upstream tributary of the Yellow River that is heavily influenced by excessive pollutant discharge. In this study, the water quality of the Weihe River was studied based on five water quality indices: COD_Mn (chemical oxygen demand), BOD₅ (biochemical oxygen demand), NH₃-N (ammonia nitrogen), DO (dissolved oxygen), and PPI (potassium permanganate index), using monitoring data collected from 13 river sections in the middle and lower reaches of the river from 2001 to 2010. Our results showed that the water quality tended to deteriorate from the upper to the lower reaches of the river. Additionally, COD_Mn, NH₃-N and PPI were found to be the major factors resulting in water pollution over time in all river sections, but the pollutant concentrations with the interannual variability differed in every section. Therefore, many efficient and reasonable measures should be carried out to control water pollution and improve water quality in the Weihe River.

• Periodical: Advanced Materials Research (Volumes 955-959)
• Pages: 3245-3258
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.955-959.3245
• Online since: June 2014
• Authors: Juan Deng, Dong Feng Hu, Zhou Ping Shangguan*
• Keywords: Evaluation, Tendency, Water Quality, Weihe River

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