Abstract
The Can Tho river is an important source of water supply to the local people. An evaluate of the Can Tho river water quality is very necessary. Therefore, the use of water quality indices (WQIs) as a tool to evaluate the status of water quality in rivers has been studied for the period of 2010-2014. For this purpose, monitoring data obtained during this period was collected. Physical, biological and chemical parameters of surface water including pH, TSS, DO, BOD, COD, NH3, NO3-, and coliform were determined . The results indicated that most of the indicators exceeded the Vietnamese standard. However, they has significantly improved in the last years (2014) of the research period. In addition, the use of WQIs is fundamental to represent a large number of parameters in a single number. The WQI values showed that river water quality in districts of Ninh Kieu, Cai Rang and Phong Dien has the water quality has significantly improved during the research period.
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