WATER QUALITY EVALUATION OF THE TIEN RIVER BY MEANS OF WATER QUALITY INDEX (WQI) AND STATISTICAL TECHNIQUES
Keywords:evaluation, water quality index, surface water, Tien Giang.
This study aimed to evaluate the Tien River’s water quality by using Water Quality Index (WQI) and statistical techniques. Water samples were collected from six monitoring stations along Tien River. At each station, samples were taken in dry season and wet season during three years (2014-2016). Physicochemical parameters of surface water samples including pH, DO, COD, BOD, total coliforms, TSS, NH4+-N, and PO43- were analyzed to evaluate the water quality. The results illustrated that surface water of the river was gradually polluted from year to year. In addition, the water quality insignificantly varied between monitoring sites. Furthermore, the seasonal feature was not a principal factor to impact water quality during the years. The concentrations of most elements in the studied water samples were much higher than the permissible levels for river water. This integrated technique has been pointed out to be an effective approach to set up a correlation between water quality and the sustainable wastewater management in the Tien river basin.
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