000			04081nam a2200445 4500
005			20260818134008.0
008			010998 1998 th r m eng
035			_a.b1172321x
099		9	_aAIT Thesis no.WM-97-16
100	0		_aThin Thin Aung
245	1	0	_aHydraulic capability of main drainage system in city-core and eastern sub-urban Bangkok
260			_aBangkok : _bAsian Institute of Technology, _c1998
300			_a148 leaves
490	1		_aThesis ; _vno. WM-97-16
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Civil Engineering
502			_aThesis (M.Eng.) - Asian Institute of Technology, 1998
520			_aBangkok, the capital of Thailand, is located in the lower Chao Phraya river delta with flat ground elevation of 1-2 m M.S.L. Due to the rapid urbanization in Bangkok, the existing drainage systems cannot work effectively. Therefore, an assessment of capability of main drainage system was carried out in the city-core and eastern sub-urban of Bangkok. Since, the city-core is the main Central Business District (CBD) of Bangkok and hence its drainage system is more impo1tant to analyze than others. The study area is located on the east bank of Chao Phraya river within the territory of the Bangkok Metropolitan Administration (BMA). It covers about 650 km 2 {u2022} In this study, SWMM software package was applied to simulate the flow discharges (in the channel and) flow depth (at the junctions ) at any time. The model has two programs for runoff (RUNOFF block) and complex network of open channel flow (EXTRAN block). The result from the first block are input into the second block to simulate water level variation with time at any node. Schematizing the channel network into 15 8 number of nodes, 179 numbers of branches with seven outlet boundary nodes located along the Chao Plll'aya river. The calibration of ldong network was carried out for the first time with the recent 15 minutes rainfall data. With future land use, total surcharged time increased by 2 times and flooded time increased by 1.65 times for 5 years returns periods compared with 2 years return periods. The total maximum volume is reduced by 75 % for 2 years return periods and nearly 50 % for 5 years return periods comparing with existing drainage system for klong's improvement work. When main pumping station is out of order, total maximum volume is increased by double for 2 years return periods and 1.6 times for 5 years return periods comparing with existing drainage system.
650		0	_aUrban runoff _zThailand _zBangkok
700	0		_aSutat Weesakul, _eChairperson
700	0		_aTawatchai Tingsanchali, _eExamination committee
700	1		_aEckhardt, Ing Heinz, _eExamination committee
700	1		_aKazama, So, _eExamination committee
710	2		_aDAAD, _eScholarship donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. WM-97-16
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B13336
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