000			03472nam a2200385 4500
005			20260817162532.0
008			210598 th eng
035			_a.b10083662
099		9	_aAIT Thesis no.WA-86-15
100	0		_aSomchai Rojanakamthorn
245	1	0	_aAnalytical model of tide and river flow interaction
260			_aBangkok : _bAsian Institute of Technology, _c1986
300			_a116 p.
490	1		_aThesis ; _vno. WA-86-15
500			_aA thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering, School of Engineering and Technology
502			_aThesis (M.Eng.) - Asian Institute of Technology, 1986
520			_aThe main cause of flooding in the Lower Chao Phraya River Plain which seriously damage the Bangkok city is obviously the interaction of high freshwater discharge from the north and high tides in the Gulf of Thailand. Owing to these ocean tides, the flow in the lower region of the Chao Phraya River becomes unsteady and is governed by the unsteady flow of wave hydrodynamic equations. Due to nonlinearity of the governing equations, the problems have been solved numerically only. In the present study, the governing equations are solved analytically using the approximation method of Perturbation to investigate the interaction of tide and freshwater discharge of the Chao Phraya River. The convective and nonlinear friction terms are also included in the derivations. Harmonic analysis is applied to five tidal records along the river in the years 1980 and 1983 to decompose the complicated interaction of the freshwater discharge with various constituents of tides into its individual interaction with each constituent. Four main constituents are included in this study. The relations of important dimensionless parameters of the tide, especially the dimensionless damping modulus, are then determined for each solution. The results obtained from the study show that analytical solution of dimensionless damping modulus under estimated the measured value obtained from harmonic analysis due to the weak point of mathematical approximation method of Perturbation. Therefore, modifications have been worked out to establish their correlations. Results of water level obtained by applying the analytical model to a tidal reach of the Chao Phraya River from Bangsai (km 112) to the river mouth (km O) are compared very well with those obtained from harmonic analysis.
650		0	_aTides _xMathematical models
700	0		_aSuphat Vongvisessomjai, _eChairperson
700	1		_aWang, Tsan-Wen, _eExamination Committee
700	0		_aTawatchai Tingsanchali, _eExamination Committee
710	2		_aTHE STARR FOUNDATION , U. S. A., _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. WA-86-15
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B19791
907			_a.b10083662 _bmnait _cs
902			_a240410
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909			_aBarcode : 30050120573505 _bCREATED : 2014-02-04 _cRECORD # : i12785465 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
909			_aBarcode : 30050160034939 _bCREATED : 2016-09-02 _cRECORD # : i12879058 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
999			_c5346 _d5346