000			03937nam a2200433 4500
005			20260818114135.0
008			210598 th eng
035			_a.b10287309
099		9	_aAIT Thesis no.WA-86-14
100	1		_aRana, Md. Yunus
245	1	0	_aFlume experiments on sediment bed load in steady non-uniform flow
260			_aBangkok : _bAsian Institute of Technology, _c1986
300			_a71 p.
490	1		_aThesis ; _vno. WA-86-14
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			_aAn experimental investigation on the determination of bed load in steady non-uniform flow was carried out using one size of uniform coarse sand. The study is separated into three parts, namely; experiments in steady uniform flow in the parallel sidewall flume , steady non-uniform flow in the converging sidewall flume and steady non-uniform flow in t he diverging sidewall flume. The steady uniform flow experiments were conducted in a flume of 18 m length, 0.82 m width with different depths and water surface slopes. The measured bed load and flow parameters are presented in non-dimensional form (u - q curve) for use in determining the bed load for any given uniform flow condition. The steady non-uniform flow experiments in the converging sidewall flume were conducted for contraction ratios of the width from 0 .693 to 0 . 291. The steady non-uniform flow experiments in the diverging sidewall flume were conducted for expansion ratios of the width from 1.811 to 3.255 . From the analysis of experimental data on both converging and diverging wall cases, it was found that the correction factor or bed load ratio (DQS) for the computed bed load using a uniform flow formula based on energy slope of non-uniform flow depends on two factors namely: the ratio between the gradient of depth and velocity head over the energy s lope (DS) and the ratio between the measured and computed velocity gradients (a). The value of DQS can be greater or less than one depending on the corresponding a value. When a is one, DQS is a l so one . This implies uniform flow conditions. Moreover, the ratio of depths in upper and lower uniform sections in relation with the width ratio when compared with t he theoretical values indicate that the experimental ranges a re bet ween the conditions of having clear water scour and scour under full sediment supply . It was found t hat the sediment supply rates in the experiments are mostly less than the required rate predicted by the theory.
650		0	_aFlumes
650		0	_aBed load
700	0		_aTawatchai Tingsanchali, _eChairperson
700	0		_aSuphat Vongvisessomjai, _eExamination Committee
710	2		_aChristoph, Ing. Fried, _eExamination Committee
710	2		_aThe Canadian International Development Agency, _eScholarship Donor
810	2		_aAsian Institute of Technology. _tThesis ; _vno. WA-86-14
856			_3Full-Text _uhttp://203.159.5.9/ait-thesis/detail.php?q=B19790
907			_a.b10287309 _bmnait _cs
902			_a240402
998			_b2 _c951012 _dm _ea _fs _g0
945			_lmnait
945			_lmnarc
945			_lmnait
942			_c22
942			_c40
942			_c20
909			_aBarcode : 30050120573513 _bCREATED : 2014-02-04 _cRECORD # : i12785477 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
909			_aBarcode : 30050160034947 _bCREATED : 2016-09-02 _cRECORD # : i12879034 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
909			_aBarcode : 30050121028327 _bCREATED : 2022-10-18 _cRECORD # : i13408343 _dLPATRON : 0 _eLCHKIN : - _f# RENEWALS : 0 _g# OVERDUE : 0 _hIUSE3 : 0 _iTOT CHKOUT : 0 _jTOT RENEW : 0
999			_c45944 _d45944