000			02961nam a2200397 4500
005			20260817172438.0
008			120698 th eng
035			_a.b10133938
099		9	_aAIT Thesis no.WA-90-18
100	0		_aWudhipong Kittitanasuan
245	1	0	_aChanges in channel bed slope due to non-equilibrium sediment transport
260			_aBangkok : _bAsian Institute of Technology, _c1990
300			_a84 p.
490	1		_aThesis ; _vno. WA-90-18
500			_aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology
502			_aThesis (M.Eng.) - Asian Institute of Technology, 1990
520			_aAnalytical solutions were determined to predict changes in bed levels of an alluvial channel when the upstream sediment supply in stopped or when the downstream end bed level drops. These solutions were determined by solving the continuity and momentum equations of flow and sediment transport. Two approaches were considered. The first so called the parabolic modeling considers that the friction slope in the flow momentum equation is equal to the bed slope. The second approach so called the hyperbolic modeling considers the friction slope equal to the water surface slope. The analytical solutions determined in this study are compared with the experimental data in this study and those given by Newton (1951) and also with the previous analytical solutions determined by De Vries (1973) and Gill (1983). The results of the comparison verifies the ranges of applicability given by Ribberlik (1984) of the parabolic and hyperbolic models. In general it is found that the solutions of hyperbolic model provide an more accurate prediction of changes in bed level with time than the parabolic model in the region near to the source of bed change. In the region far from the source of bed change, both models predict equally good.
650		0	_aSediment transport
650		0	_aChannels (Hydraulic engineering)
700	0		_aTawatchai Tingsanchali, _eChairperson
700	1		_aGupta, Ashim Das, _eExamination Committee
700	1		_aAkiyama, Juichiro, _eExamination Committee
710	2		_aThe Government of Japan, _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. WA-90-18
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B18596
907			_a.b10133938 _bmnait _cs
902			_a240411
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