000 03386nam a2200409 4500
005 20260818094946.0
008 200198 th eng
035 _a.b10227246
099 9 _aAIT Thesis no. 942
100 0 _aTheerawat Tangpanich
245 1 0 _aEffect of grain-size distribution on sediment discharge in a flow
260 _aBangkok :
_bAsian Institute of Technology,
_c1977
300 _a98 p.
490 1 _aThesis ;
_vno. 942
500 _aA thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering of the Asian Institute of Technology, Bangkok, Thailand
502 _aThesis (M.Eng.) - Asian Institute of Technology, 1977
520 _aThe purpose of this study is to investigate the effect of non-uniformity of grain size on sediment discharge in a steady flow. Laboratory experiments have been conducted by using a recirculating flume, in which the graded sediments with a medium diameter of 0.50 mm and a geometric standard deviation of 2.23 have been placed. The suspended load, total load, flow discharge and the water surface slope have been measured for several different flow conditions. The grain-size distributions of transported sediments have also been measured by mechanical sieving method. The values of critical shear stress evaluated by two different methods based on the experimental data are compared with the previous studies by Straub and Shields, and the interaction effect between sediment fractions of different grain size is discussed. The values of sediment transport evaluated by the DuBoys' as well as Engelund and Hansen's formula show quite good agreements with the measured ones, while the Einstein's bed load function is concluded to give considerably smaller values. The sediment load is also evaluated for each grain size fraction, into which the total load is divided, by using the DuBoys ' formula, and is compared with the measured value. It is suggested that in the sediment mixture of non-uniform size, the coarse grains might tend to move more easily as compared with the uniform sediment of the same size, while the fine sediment might be obstructed to move and show smaller discharge.
650 0 _aSedimentation and deposition
700 1 _aWatanabe, Akira,
_eChairperson
700 0 _aPrida Thimakorn,
_eCo-Chaiperson
700 1 _aOverbeek, Henk Jen,
_eExamination Committee
710 2 _aProvincial Government of British Columbia,
_eScholarship Donor
810 2 _aAsian Institute of Technology.
_tThesis ;
_vno. 942
856 _3Full-Text
_uhttp://203.159.5.9/ait-thesis/detail.php?q=B22685
907 _a.b10227246
_bmnait
_cx
902 _a250904
998 _b2
_c951012
_dm
_ea
_fx
_g0
945 _lmnait
945 _lmnait
945 _lmnarc
942 _c20
942 _c40
909 _aBarcode : 30050003051124
_bCREATED : 1994-05-17
_cRECORD # : i10276336
_dLPATRON : 0
_eLCHKIN : -
_f# RENEWALS : 0
_g# OVERDUE : 0
_hIUSE3 : 0
_iTOT CHKOUT : 0
_jTOT RENEW : 0
909 _aBarcode : 30050003419743
_bCREATED : 1994-05-17
_cRECORD # : i10276348
_dLPATRON : 0
_eLCHKIN : -
_f# RENEWALS : 0
_g# OVERDUE : 0
_hIUSE3 : 0
_iTOT CHKOUT : 0
_jTOT RENEW : 0
909 _aBarcode : 30050160089792
_bCREATED : 2016-04-28
_cRECORD # : i12961012
_dLPATRON : 0
_eLCHKIN : -
_f# RENEWALS : 0
_g# OVERDUE : 0
_hIUSE3 : 0
_iTOT CHKOUT : 0
_jTOT RENEW : 0
999 _c34385
_d34385