The north Indian rivers are perennial as they are snow fed but the south Indian rivers are seasonal as they are rain fed. Since they are rain fed there is no guaranty of rain. So the south Indian rivers are less suitable for irrigation than the rivers of north India. Canal irrigation is adequate in the Northern Plains because the soil in this area is permeable and the level of groundwater is high. Canals in the northern plain of India are built near the rivers for effortless transportation of water everywhere.