03424nam a2200421 4500 20260818173827.0 070198 th eng .b10518861 AIT Thesis no. 738 Witaya Chongchareon Prediction of salt water concentration at Chao Phya estuaries Bangkok : Asian Institute of Technology, 1975 52 p. Thesis ; no. 738 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering of the Asian Institute of Technology, Bangkok, Thailand. Thesis (M.Eng.) - Asian Institute of Technology, 1975 The M.I,T. Transient Salinity . Intrusion Model was used for the prediction of salinity distribution in the Chao Phya Estuary. The model is formulated in finite-difference terms using the one dimensional, tidal time, variable area equations of continuity, longitudinal momentum and conservation of salt. The tidal dynamics equations were solved by explicit scheme while the salt balance equation was solved by implicit scheme. For a given set of initial and boundary conditions, the instantaneous tidal motion and salinity distribution can be obtained throughout any specified number of tidal periods. The effect of boundary conditions was discussed and the schematization of Chao Phya Estuary from river mouth up to 116 kilometers upstream was presented. The model was calibrated by adjusting the Manning roughness coefficient. The calibrated Manning roughness coefficient was then used to predict the transient salinity distribution from the mathematical model for three periods each of which having 32 tidal cycles. Records of fresh water inflows, salinity and water surface profiles at the entrance were used as the inputs to the model during the transient runs. The predicted and observed salinity distributions were in good agreement. Finally, the maximum salinity distributions along the estuary at various regulated fresh water discharges were also presented for the purpose of salt water intrusion control. Saline water conversion Chao Phya River Estuaries Chao Phya River Arbhabhirama Anat, Examination Committee Nishimura, Hitoshi, Examination Committee Prida Thimakorn, Examination Committee Keidanren Foundation and the Asian Institute of Technology, Scholarship Donor Asian Institute of Technology. Thesis ; no. 738 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B23992 .b10518861 mnait x 260427 1 951012 m a x 0 mnait mnait mnarc 20 40 Barcode : 30050002894383 CREATED : 1996-06-06 RECORD # : i11774630 LPATRON : 1021897 LCHKIN : 2014-07-05 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 2 TOT RENEW : 0 Barcode : 30050003034856 CREATED : 1996-06-06 RECORD # : i11774642 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050160092895 CREATED : 2016-04-22 RECORD # : i12948986 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 90914 90914 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. 738 30050002894383 2026-08-18 17:38:27 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. 738 30050003034856 2026-08-18 17:38:27 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. 738 30050160092895 2026-08-18 17:38:27 2026-08-18 40