03792cas|a2200409 i 4500 20260817162256.0 141197s1978 th uzm rtt 00| a1eng d .b10079956 AIT Diss. no. D37 Jerasak Premchitt Analysis and simulation of land subsidence with special reference to Bangkok Bangkok : Asian Institute of Technology, 1978 295 p. Dissertation ; no. D37 A dissertation submitted in partial fulfilment of the requirements for the degree of Doctor of Engineering. Thesis (Ph.D.) - Asian Institute of Technology, 1978 This dissertation is concerned with the development and use of a finite difference mathematical model for the simulation of the phenomenon of land subsidence due to ground water withdrawal. The work consists of the two separate parts: (i) theoretical analysis of the piezometric pressure declines and rates of compression of the idealized units which comprise the basic components of a multi-aquifer system, and (ii) development of a full mathematical model for the simulation of the subsidence process, and the application of this model to the Bangkok area. The theoretical analysis employs an axi-symmetric hydrologic model together with a one-dimensional consolidation model. The behaviour of idea- lized clay layer-aquifer systems under time-dependent pumping rates was extensively investigated. unique time-drawdown and time-compression relationships were established. From this analysis' the integro-differential equation governing the behaviour of multiaquifer systems was derived,and it was found to correSpond with past work. A simple approximate technique for the prediction of subsidence was also derived from this analysis, and this gave satisfactory results as compared with the full model predictions. The composite model for subsidence prediction consists of a 'quasi- three-dimensional' hydrologic model and a one-dimensional consolidation model. A parametric study was carried out to assess the significance of the various model parameters. The model was then used to simulate the phenomenon of land subsidence in the Bangkok area,-and this demonstrated its power and flexibility. 0n the basis of the available information, the subsidence in central Bangkok was predicted to have been 0.76 m in 1975, with a total pumping rate of 600,000 m [day from the upper four aquifers. Predictions of subsidence to 1995 were also carried out for several assumed future pumping schemes. The prediction for the most severe pumping scheme was in excess of two metres in 1995 Subsidences (Earth movements) Thailand Bangkok Brand, E.W., Chairperson Arbhabhirama, Anat, Examination committee Balasubramaniam, A.S., Examination Committee Prinya Notalaya, Examination committee Selvalingam, S., Examination committee Government of Canada, Scholarship donor Asian Institute of Technology. Dissertation ; no. D37 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B00407 .b10079956 mnait y 240410 2 951012 m a y 0 mnait mnarc 22 40 Barcode : 30050120566160 CREATED : 1995-10-13 RECORD # : i10081379 LPATRON : 1029636 LCHKIN : 2020-07-13 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 1 TOT CHKOUT : 4 TOT RENEW : 6 Barcode : 30050160039599 CREATED : 2016-01-18 RECORD # : i12868814 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 4524 4524 0 0 0 0 MAIN MAIN mnait 2026-08-17 10.00 0 AIT Diss. no. D37 30050120566160 2026-08-17 16:22:56 1 2026-08-17 22 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Diss. no. D37 30050160039599 2026-08-17 16:22:57 2026-08-17 40