03434nam a2200433 4500 20260818095023.0 150598 th eng .b10227945 AIT Thesis no. WA-83-5 Lal, Narendra Kumar Effect of overbank flow on subsidence of flood waves Bangkok : Asian Institute of Technology, 1982 69 p. Thesis ; no. WA-83-5 A thesis submitted in partial fulfillment of the requirement for the degree of Master of Engineering, school of Engineering and Technology Thesis (M.Eng.) - Asian Institute of Technology, 1982 Subsidence of flood peak discharge and flood wave celerity in channels with overbank areas considering f l ow velocity in overbank portions is investigated. Based on dimensional analysis the subsidence of peak flow along the channel and the flood wave celerity is expressed as a function of seven nondimensional parameters each raised to a certain exponent. These nondimensional parameters are related to the widths of the main channel and overbank areas, bankfull depth and conveyance, duration of flood hydrograph and its volume , peak inflow, bankfull discharge, bed slope, Manning' s n coefficients of main channel and overbank flow areas. The exponents of each nondimentional parameters in the subsidence function are evaluated based on the results of the numerical simulations using finite difference method of implicit scheme. The subsidence function developed is tested in the Chao Phraya river from the Chao Phraya dam to Singburi with two set of data of flood flow in 1978 and 1980. Good results are found in these tests. The wave speed function, developed is tested with data obtained from numerical simulations, good agreement of the results are found. However further study considering backwater effects in deriving t he subsidence function and testing these subsidence and wave speed functions in wide range of field data in other rivers are recommended. Floods Tawatchai Tingsanchali, Chairperson Hoshi, Kiyoshi, Examination Committee Suphat Vongvisessomjai, Examination Committee The Royal Danish Government., Scholarship Donor Asian Institute of Technology. Thesis ; no. WA-83-5 Full-Tex http://203.159.5.9/ait-thesis/detail.php?q=B21406 .b10227945 mnait s 241004 2 951012 m a s 0 mnait mnait mnarc mnarc 20 40 Barcode : 30050002949252 CREATED : 1994-05-17 RECORD # : i10277407 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050003069902 CREATED : 1994-05-17 RECORD # : i10277419 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160036058 CREATED : 2016-05-02 RECORD # : i12877529 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050121098973 CREATED : 2023-12-10 RECORD # : i13469010 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 34541 34541 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. WA-83-5 30050002949252 2026-08-18 09:50:23 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. WA-83-5 30050003069902 2026-08-18 09:50:23 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. WA-83-5 30050160036058 2026-08-18 09:50:23 2026-08-18 40 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. WA-83-5 30050121098973 2026-08-18 09:50:23 3 2026-08-18 20