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Track: Water Resources
Ole Mark
Danish Hydraulic Institute
Agern Alle 5
Horsholm,
DENMARK
Telephone: 011-45-45-769555
Fax: 011-45-45-762567
Terry van Kalken, Jesper Kjelds, K. Rabbi
A MOUSE GIS Study of the Drainage in Dhaka City
In Bangladesh, the Dhaka metropolitan area has been experiencing water logging for several years. A little rain causes a serious problem for certain City areas. This water logging results in parts of Dhaka are being inundated for several days, hence producing large infrastructure problems for the City. The City of Dhaka is protected from river flooding by an encircling embankment. Most of the time during the monsoon the water level in the river remains higher than the water level inside the City area. The City drainage depends very much on the water levels of the peripheral river system. Standard draining by gravity may not always work. In order to facilitate drainage it is planned to install pumps at some of the outlets to the rivers. Major reconstruction work has also been proposed. In order to evaluate and optimize the various alleviation schemes a hydrodynamic model MOUSE, has been made for a subcatchment of the City. The MOUSE model computes water levels and flow both for the drainage pipes and
for the streets. In order to evaluate the results for the various alleviation schemes, a digital elevation Model (DEM) has been established for the catchment area. The results in terms of water depth in the streets are then used for generation of inundation maps based on the DEM and the ArcView-based MOUSE GIS system. The application of the MOUSE model in conjunction with ArcView visualizes the capabilities of the models to reproduce flooding scenarios of the past. Further, it provides a methodology for developing sustainable alleviation schemes by means of integrated management based on GIS and information technology. Such tools are very cost efficient for planning and management of the drainage system of Dhaka City in the future.
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