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008			030912s2003 th uzm rtt 00| a1eng d
035			_a.b11898562
099		9	_aAIT Thesis no. WM-02-06
100	1		_aAlam, Jahangir Md.
245	1	0	_aTwo-dimensional urban flood modeling for real time flood forecasting for Dhaka city, Bangladesh
260			_aBangkok : _bAsian Institute of Technology, _c2003
300			_a77, 4, 3, 2 leaves
490	1		_aThesis ; _vno. WM-02-06
500			_aA Thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering
502			_aThesis (M.Eng.) - Asian Institute of Technology, 2003
520			_aFlooding is a severe problem for many cities in the world. The situation is more aggravated in developing countries like Bangladesh. The cities are experiencing water logging due to inadequate drainage capacity, poor maintenance of the drainage system and the effect of heavy storm runoff resulting from rapid urbanization. An efficient flood management can help in reducing flood damages and associated risks, considerably. With the growing concern of modeling accuracy, a new recommendation for urban flood modeling approach has come out from the various urban flooding studies all over the world which is a combined two-dimensional modeling for surface runoff with one-dimensional pipe flow model. The present study has been aimed to develop and evaluate such a new approach which has been applied for urban flooding problem in Dhaka City. Recently developed MOUSE-MIKE21 coupling tool has been used for this present study, which is the first time in use with real data. The main difficulty was to formulate the governing equations, couple two models and simulate MOUSE-MlKE21 model smoothly. The different flow exchange concepts have been developed and incorporated in the model during this study. A time centering technique has been tested for smooth transition of flow between surface and pipe flow model so that model can be stable during simulation. The MOUSE-MlK.E21 model has been simulated successfully, and the results have been compared with 1-D model results as well as with observed flooding for evaluation. The model has produced sufficiently accurate result in terms of flood depth, timing of peak flow and flood extent as well for Dhaka City. However, due to some limitations of this new tool, the flow exchange has been predicted in one direction only i.e. from sewer to surface. Another finding is that hydrological model is needed to be incorporated with the surface model so that runoff hydro graph can be assigned on the surface instead of sewer manhole, which is more realistic. The MOUSE-MIKE21 model could not be applied for online operation for Dhaka City since it takes high computational time. Further study is suggested so that computational time can be reduced for online operation. The model is very suitable for flood risk and damage assessment and offline study.
650		0	_aFlood forecasting _zBangladesh _zDhaka
650		0	_aHydrologic models _zBangladesh _zDhaka
700	1		_aMark, Ole, _eChairperson
700	0		_aSutat Weesakul, _eCo-chairperson
700	1		_aGupta, Ashim Das, _eExamination Committee
700	0		_aTawatchai Tingsanchali, _eExamination committee
700	1		_aTripathi, Nitin Kumar, _eExamination Committee
710	2		_aDanish International Development Assistance (Danida), Denmark, _eScholarship donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. WM-02-06
856			_3Full-Text _u http://203.159.5.9/ait-thesis/detail.php?q=B08481
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