Pakistan is having the largest network of irrigation canals, but the danger of water seeping into the ground was not realized at the outset and no precautionary measures against it taken. This has resulted in the form of waterlogging. Remedial measures to control seepage of water have been indicated by providing canals with brick lining. Various types of canal linings have been described, and it is suggested that the brick lined canal should be designed as per Mannings ‘n’= 0.05.