Assessment of water quality and identification of polluted risky regions based on field observations & GIS in the Honghe River watershed, China

PloS One
Chang-An YanNing Nie

Abstract

Water quality assessment at the watershed scale requires not only an investigation of water pollution and the recognition of main pollution factors, but also the identification of polluted risky regions resulted in polluted surrounding river sections. To realize this objective, we collected water samplings from 67 sampling sites in the Honghe River watershed of China with Grid GIS method to analyze six parameters including dissolved oxygen (DO), ammonia nitrogen (NH3-N), nitrate nitrogen (NO3-N), nitrite nitrogen (NO2-N), total nitrogen (TN) and total phosphorus (TP). Single factor pollution index and comprehensive pollution index were adopted to explore main water pollutants and evaluate water quality pollution level. Based on two evaluate methods, Geo-statistical analysis and Geographical Information System (GIS) were used to visualize the spatial pollution characteristics and identifying potential polluted risky regions. The results indicated that the general water quality in the watershed has been exposed to various pollutants, in which TP, NO2-N and TN were the main pollutants and seriously exceeded the standard of Category III. The zones of TP, TN, DO, NO2-N and NH3-N pollution covered 99.07%, 62.22%, 59.72%, 37.34% and 1...Continue Reading

References

Jun 8, 2001·Water Research·S B Jonnalagadda, G Mhere
Oct 5, 2001·Environmental Pollution·A FacchinelliL Mallen
Oct 30, 2009·Journal of Environmental Sciences (China)·Wei MengBinghui Zheng
Nov 26, 2009·Environmental Monitoring and Assessment·Yong-Hui YangCheng-Jie He
Jun 6, 2014·Environmental Science & Technology·Wenjun JiangKevin E O'Shea

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Citations

Oct 23, 2015·International Journal of Environmental Research and Public Health·Qing GuLi Sheng
Feb 11, 2019·Environmental Monitoring and Assessment·Nwachukwu R EkereJanefrances N Ihedioha
Apr 3, 2021·Journal of Trace Elements in Medicine and Biology : Organ of the Society for Minerals and Trace Elements (GMS)·Diana RabadjievaSotirios Karavoltsos
Jun 22, 2021·Environmental Monitoring and Assessment·Diana RabadjievaSotirios Karavoltsos

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Software Mentioned

SPSS
OrKrig
GIS

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