| dc.description.abstract | Purpose: In previous time, there were large amount of water bodies in
Dhaka Metropolitan (DMP) area but due to various development
activities, it has been shrinking with the passage of time. This research
investigates the changes amount of water bodies in DMP area and find
out how much built-up area are developed on water bodies in last 30
years.
Methodology: The Landsat satellite data of 1989, 2002 and 2019 have
been generated with unsupervised classification techniques which is used
here to identify the water bodies and built-up area with the help of remote
sensing and GIS based software like ERDAS IMAGINE, Arc Map 10.6.
Findings: According to the study, the reduction rate of water bodies in
DMP is high as the built-up area is increasing rapidly. In the last 30 years
almost 2066.28 hectares water bodies are reduced while 1180.46 hectares
are transformed into built-up area.
Limitations: To collect the data of total water bodies in DMP area would
bring more elaborate information but it would be time consuming and
involved more authentic survey by related authorities.
Practical Implications: As Bangladesh is highly populous country and
its urban growth is rising rapidly, the balanced urbanization program for
built up area is really needed according to ecological system. The
diminishing of water bodies are happening for exploitation which is an
alarming concept for scarcity of fresh water and proper drainage system.
Originality/Value: Findings from this study can contribute in the urban
planning, drainage planning and balancing the systems with topical
processes for the eradicating the reduction rate of water bodies. | en_US |
