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Abstract
Bangladesh is situated in the lower part of the Ganges-Brahmaputra-Meghna (GBM) river basin, which is one of the most populated countries in the world. The Buriganga river system is located in the southern part of the north-central region of the country, which passing through west and south of Dhaka, the capital of Bangladesh. A total of 96 water samples were collected from eight different points along the river and considered 10 physiochemical parameters such as Temperature, pH, DO, BOD, COD, TDS, TSS, T. Alkalinity, EC, and Chloride during March 2015 to February 2016. Therefore, the study has investigated the status of the river water quality by above parameters and followed the Environmental Quality Standard (EQS) set in Bangladesh Environmental Conservation Rules (ECR, 1997), United States Environmental Protection Agency (USEPA) Water-Quality Standards (1994), and Bureau of Indian Standard (BIS, 1991). The mean values for the parameters in both dry and wet seasons were compared with the surface water quality standards measured by ECR. The result showed spatial and temporal variation of Temperature, pH, DO, BOD, COD, TDS, TSS, T. Alkalinity, EC, and Chloride from 21.4 to 30.0°C, 6.9 to 7.9 (mg/L), 0.0 to 4.9 (mg/L), 1 to 23 (mg/L), 8 to 63 (mg/L), 63 to 566 (mg/L), 16 to 72 (mg/L), 46 to 295 (mg/L), 138 to 1133 (µS/cm), and 8 to 119 (mg/L) respectively. Where almost all the mean values from the samples were cross the standard limit. This study revealed that the water quality of Buriganga is not safe for aquatic life. Keywords: Buriganga River, Water Quality, Pollution, Water Quality Parameters, Bangladesh Environmental Conservation Rules (ECR), Department of Environment (DoE), Bangladesh DOI: 10.7176/JEES/11-2-09 Publication date: February 28 th 2021
Highlights
The Buriganga River "Old Ganges" flows past the southwest outskirts of Dhaka city
States Environmental Protection Agency-United States Environmental Protection Agency (USEPA), 1986), United Nations Economic Commission for EuropeUNECE standard statistical classification of surface freshwater quality for the maintenance of aquatic life as well as Indian national tolerance limits for inland surface waters used for fish culture and wildlife propagation as per BIS 2296:1982 along with Bangladesh inland surface water quality standards for fisheries and irrigation as per
In recent years the Buriganga river has become a dumping ground of all kinds of solid-liquid and chemical wastes that are generated by the activities in and around the river
Summary
The Buriganga River "Old Ganges" flows past the southwest outskirts of Dhaka city. M (2006) found that the river Buriganga is increasingly being polluted due to industrial flow and sewerage lines dumping huge volumes of toxic wastes all time. The city of Dhaka discharges about 5,000 tons of solid waste every day and most of it is released into the Buriganga According to the Department of the Environment (DoE), 22,000 liters (5,800 US gal) of toxic waste are released into the river by the tanneries every day. With the passages of time, tremendous human pressure on Buriganga river in terms of playing motorized water vessels, infrastructural development, encroachment, industrial and sewage waste dumping, etc. The present study was conducted to analyze some selected physiochemical water quality parameters like temperature, pH, electrolytic conductivity (EC), dissolved oxygen (DO), chemical oxygen demand (COD), biochemical oxygen demand (BOD), total dissolved solids (TDS), suspended solids (SS), total alkalinity and chloride along the river
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