03197cas a2200421 a 4500 20260818214636.0 110910s1986 th uu|m rtt 0| a1eng d .b10618107 AIT Thesis no. AE-86-04 Kalita, Prasanta Kumar Solution for seepage and percolation in paddy fields using finite difference techniques Bangkok : Asian Institute of Technology, 1986 89 p. Thesis ; no. AE-86-04 A research study submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development Thesis (M.Eng.) - Asian Institute of Technology, 1986 In some South-East Asian countries where farm sizes are small, a large amount of irrigation water is lost from the paddy fields into surrounding fallow fields through the bunds. The magnitude of both lateral loss known as seepage and vertical loss known as percolation are to be accurately determined for better management of irrigation water. An attempt was made in this study to determine the magnitude of seepage and percolation separately in paddy field condition with variable water table and ponding water depths for different soil textures. For this purpose, the two dimensional steady seepage equation was converted into finite difference expression and the solution was obtained by relaxation technique. A computer program was developed to fit all the boundary conditions and to compute the final improved potentials by the process of iterations. Darcy's law was applied to calculate seepage and percolation from the improved potentials . It was observed that seepage and percolation increased with deeper water table, higher ponding depth and higher value of hydraulic conductivity of the soil . The findings of this model conform to observations done by field experiments. Soil percolation Mathematical models Seepage Mathematical models Rahman, Md. Ataur, Chairperson Gupta, Ashim Das, Examination Committee Nielsen, Jens Moller, Examination Committee The Royal Government Of the Netherlands, Scholarship Donor Asian Institute of Technology. Thesis ; no. AE-86-04 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B19566 .b10618107 mnait s 240328 2 951012 m a s 0 mnait mnait mnarc 20 40 Barcode : 30050003001293 CREATED : 1994-05-18 RECORD # : i10783994 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050003001327 CREATED : 1994-05-18 RECORD # : i10784007 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 Barcode : 30050120300180 CREATED : 2016-05-27 RECORD # : i12996609 LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 109371 109371 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. AE-86-04 30050003001293 2026-08-18 21:46:36 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. AE-86-04 30050003001327 2026-08-18 21:46:36 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. AE-86-04 30050120300180 2026-08-18 21:46:36 2026-08-18 40