Rainwater Harvesting As An Alternative Option
For Sustainable Water Management Of
Dhaka City
Author(s)
A. Tabassum, F. Hasan Ovi, M. A. Hanif & I. Islam
Abstract
Despite the advancement of technology in the recent past, the global scenario
still remains grim in water supply as not all the inhabitants of the world have
access to safe drinking water. Dhaka city is now facing tremendous challenges to
fulfil the water demand of its inhabitants. Groundwater table depletion is
increasing at an alarming rate. This study mainly focuses on the potential of a
rainwater harvesting system in Kazipara area of Dhaka city. The study area has
typical characteristics of an unplanned, congested development with a small plot
size of Dhaka city. That is why this area has been chosen. Residents of this area
face both water crises in dry summer and water logging in monsoon. It has been
calculated that the potential of rooftop rainwater harvesting is 4,02,096.34 cubic
meter water/year which can meet about a 66% demand of water for toilet
flushing and cleaning purposes used by the residents of Kazipara all year round.
If a rainwater harvesting system is used every buildings of the study area then
2,872.12 cum/hr surface runoff would be reduced during a rainfall event of
15 mm/hr, which means 61.71% of surface runoff would be reduced from the
current surface runoff. As a consequence, water logging problem can be
decreased in Dhaka city.
Keywords: rainwater harvesting, feasibility, potential, willingness to install
rainwater harvesting system.
Keywords
Keywords: rainwater harvesting, feasibility, potential, willingness to install
rainwater harvesting system.
Related Book
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