Evaluation of Water Quality Parameters of Six Selected Lakes in Dhaka City

Abstract

Dhaka, the capital city of Bangladesh is located in the geographic center of the country. Lots of lakes are situated in this city for balancing the environmental condition. But at present, almost all lakes are lost their beauty for various reasons such as continuous discharge of domestic and industrial effluents, sediments from under-construction buildings and liquid sewage through WASA drains etc. It is time to take initiatives for saving the lakes in Dhaka city. In this study an attempt was made to determine some vital water quality parameters of the selected lakes and to find out the most vulnerable location from Uttara Lake, Dhanmondi Lake, Banani Lake, Gulshan Lake, Ramna Lake and Hatirjheel Lake. Also tried to find out the remedial measures to minimize the pollution of lake water and create a safe breeding zone for fish. A strong survey has been done to identify the main reasons behind the water pollution. From the study it is seen that, the physiochemical parameters of selected lakes water are not in suitable condition. Especially Turbidity and BOD5 are in the worst condition of all the six selected lakes. The water quality status of Uttara Lake is in the best position and 68 percent people are satisfied with the present condition. But the water condition of Gulshan Lake is in the worst position. Also BOD values for fisheries are not satisfied with standard range which is very vital issue for breeding fish properly.