Mohammad Tousif Khan
Ground water is a precious resource of the nature. Most of the people think that ground water means surface water but water existing in soil pores under the land surface is known as ground water. Ground water meets the maximum needs of water of people everywhere. As depletable resource, water is also getting reduced day by day and another thing, water is polluted in various ways. So that, ground water is now under threat due to it’s over exploitation.
Dhaka is the capital city of Bangladesh which has a population of about 12.5 millions and its population rate is over 5%. Projected population is about 22 million by 2025. Dhaka is now the 7th largest populated city in the world and it is anticipated that Dhaka will be the 2nd largest city in the world by 2020. This city is full of problem and one of the major problems is water crisis.
Although Bangladesh is rich in water resource, but there remains lack of safe water. The cities in Bangladesh are the centre of employment, communications and development. So, people are rapidly migrating in these cities from rural areas place putting additional pressure on the infrastructure and water resources.
For this huge population in Dhaka city, water demand is also huge. And maximum portion of this greater demand is fulfilled by ground water. The daily requirement of water in Dhaka city is about 200 crore liters while WASA supplies 180 crore liters, leaving a shortage of 20 crore liters. Out of this 180 crore liters of water, 154.50 crore liters of water are supplied from ground water. All most 85%-87% of water is supplied from under the ground and of them are from surface water.
To supply this massive amount of water we need to extract a lot from the ground. Everyday demand for water is increasing and we are adding new pumps. In 1998, there were only 243 water pumps to lift water in 2004 it was 440 but now it is 560. Each...