02783nam a2200385 4500 20260817162305.0 100698 th eng .b1006915x AIT Thesis no.WA-90-4 Arshad, Muhammad An analysis of a subsurface drainage for water table control in Rechna command area, Pakistan Bangkok : Asian Institute of Technology, 1990 119 p. Thesis ; no. WA-90-4 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Engineering and Technology Thesis (M.Eng.) - Asian Institute of Technology, 1990 Waterlogging is one of the main problems besetting Agriculture in Palclstan. In this study a part of Rechna Doab area, Punjab, Pakistan, suffering from waterlogging problem has been selected. Where a subsurface drainage system has already existed there and is under operation. A simulation model was developed to analyze the response of the ground water to various recharge and discharge parameters. Daily data of twenty nine months was used for identification of the model parameters and for verification of the model applicability by making coincidence between computed and observed water table depth. Model simulation was done to find the required drainage rate as a main parameter of the subsurface drainage system using twenty years daily rainfall, irrigation and evapotranspiration data. The problems of the present drainage system installed in the area were analyzed and the direction of improvement of the present system was pointed out. Economical drain depths and spacings to control the water table for the improvement of waterlogging conditions were analyzed. Water table Pakistan Goto, Akira, Chairperson Murty, V.V.N., Examination Committee Loof, Rainer, Examination Committee The Government of Netherlands, Scholarship Donor Asian Institute of Technology. Thesis ; no. WA-90-4 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B18582 .b1006915x mnait s 240409 2 951012 m a s 3 mnait mnarc 22 40 Barcode : 30050120574347 CREATED : 2014-01-04 RECORD # : i12785015 LPATRON : 1028603 LCHKIN : 2018-02-21 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 1 TOT RENEW : 1 Barcode : 30050160033972 CREATED : 2016-12-02 RECORD # : i12881168 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 4574 4574 0 0 0 0 MAIN MAIN mnait 2026-08-17 50.00 0 AIT Thesis no.WA-90-4 30050120574347 2026-08-17 16:23:05 3 2026-08-17 22 0 0 0 0 MAIN MAIN mnarc 2026-08-17 0 AIT Thesis no.WA-90-4 30050160033972 2026-08-17 16:23:05 2026-08-17 40