Investigation of the water samples of six central rivers of Banglades

Six central rivers of Bangladesh were selected for this investigation. The name of the rivers are Meghna, Shitalakshya, Dhaleshwari, Padma, Buriganga and Turag. The Electrical Conductivity (EC), pH, Total Dissolved Solid (TDS), Salinity, Dissolved Oxygen (DO), Biochemical Oxygen Demand (BOD) and Turbidity of the six river waters were evaluated. The EC values of the water of the Meghna, Shitalakshya, Dhaleshwari, Padma, Buriganga and Turag rivers were found to be 202.8, 225.8, 362, 264.4, 586 and 609 µS/cm respectively. The EC values were found higher for the Turag River water than that of the other five river waters. Similarly, the pH values of 6.8, 6.8, 6.6, 6.5, 6.4 and 6.5 were found for the river waters of the Meghna, Shitalakshya, Dhaleshwari, Padma, Buriganga and Turag respectively. The pH values were found lower for the Turag river water than that of the other five river waters. The TDS and salinity of the Turag river water were found 305 ppm and 1.2% respectively. On the other hand, the TDS and salinity of the Meghna river water was found 101.4 and 0.4% which is lower compared to the other five rivers. From this research, this is clear that the quality of the Meghna river water is much better than the river waters of the Shitalakshya, Dhaleshwari, Padma, Buriganga and Turag. The quality of the Turag river water was found inferior. The Turag is one of the most important rivers of Dhaka city, the capital of Bangladesh, and a large number of unban waste goes directly to the river Turag. As a result, the water of Turag river became deteriorated. This investigation proved that the Meghna river water quality is still much better and suitable for many applications.