TN-27 : Seepage from parallel canals

Abstract

The evolution of water table due to recharge from a strip source has been analysed. The analysis has been extended to find the evolution of water table due to seepage from two parallel canals. It has been found that for two identical canals the points of maximum height of water table start moving towards each other from the centres of the canals and stop at a distance less than (B/2 t H) from the centres of the canals, B being the width of the canals at the water level and H the maximum depth of water in the canals. It is observed that for two identical parallel canals the water table in the region between the canals takes the shape of a plateau with lapse of time. The maximum rise of water table in the region between the canals has been predicted for various sizes and spacings of canals. It is found that for two identical parallel canal system, the interference of the canals is not significant up to a time factor 0. 045 if their centre to centre spacing is more than sixteen times the width of the canal.