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008			200820s2018 th uu m rtt 0| a1eng d
035			_a.b12320948
099		9	_aAIT Thesis no.WM-18-12
100	0		_aSeng Theara
245	1	0	_aLarge scale urban drainage modelling in the Eastern Bangkok Metropolitan Area
260			_aPathum Thani, Thailand : _bAsian Institute of Technology, _c2018
300			_e1 online resource (101 leaves) : _bill. (some col.) + _e1 online resource
490	1		_aThesis; _vno. WM-18-12
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering in Water Engineering and Management
502			_aThesis (M.Eng.) - Asian Institute of Technology, 2018
520			_aThe urban drainage system is an indispensable water infrastructure to carry out the stormwater resulting from the runoff in all cities around the world. Most large-scale urban drainage systems have been designed under the stationary conditions of land use and climate. Recent studies have indicated that the trend of intensity and frequency of extreme rainfall tends to increase as the results of climate change. So far, the cities will face more chance of frequent inundations due to the heavy rainfall and lack of drainage capacity. Hence, the study on existing urban drainage system becomes more challenged and urgent. In general, the modeling techniques have been applied in order to research in this area. The study focuses on the primary drainage system in the Eastern Bangkok Metropolitan area which has a rapid change in land use than other areas. It highlights the performance of existing urban drainage system corresponding to the heavy rainfall events in both present and future as well as the effectiveness of a newly added tunnel structure. MIKE 11 model is used to simulated the hydraulics in drainage network from three high rainfall events in 2013, 2016, and 2017. Based upon observed water level and recorded rainfall data, it was found that existing primary drainage system was still able to cope with heavy rainfall events with the intensitiesareapproximately90mm/day. The observed water levels in canals rose up quickly after the heavy rainfall happened in the city. The peak water level did not exceed the canal banks. The Bang Sue tunnel constructed at the northern part of the city has provided an effective flood reduction while the daily rainfall intensities was148 mm. It can reduce the peak water levels 78% to 15% depending on the distances from its pumping station (0 {u2013}13 km follow the canal line); likewise, the recession time to bring the water level back to its water level control plan would be 6 to 14 hours reduced respectively. Without tunnel, water level in Bang Sue canal overbank flow with 8,000 m. Therefore, tunnel shows highly beneficial for large scale urban water management. The return period of the 3-hour rainfall on 14 October 2017 was considered to be 5 years and its intensities will expect to change by 20 % in the near future (2015 {u2013}2039), which causes the peak water levels to increase remarkably at various locations along the canals in the city core from 10.0 to 28.4 cm equivalent to10% and40%.The area along Samsen canal was found to be the most vulnerable due to the overbank flow. However, there is no significant increment in water levels at the northern part where the new tunnel is operated. This can be inferred that the tunnel will effectively handle the inundation problems with the change in IDF of extreme rainfall in the future.
650		0	_aUrban drainage _zThailand _zBangkok
650		0	_aRunoff _zThailand _zBangkok
700	0		_aSutat Weesakul, _eChairperson
700	1		_aBabel, Mukand Singh, _eExamination Committee
700	0		_aDuc Hoang Nguyen, _eExamination committee
700	0		_aSomchai Chonwattana, _eExamination committee
710	2		_aDeutscher Akademischer Austausch Dienst (DAAD), Germany, _eScholarship donor
710	2		_aAsian Institute of Technology Fellowship, _eScholarship donor
810	2		_aAsian Institute of Technology. _tThesis; _vno. WM-18-12
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B04677
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