River bed becomes dry after ...

River bed becomes dry after few months from end of monsoon.Trenches of adequate length and depth, as per required volume of water, to be dug up in the river bed. The width of the trenches to be kept the same as width of the river.During next monsoon season the water will enter the trenches first and they will get fully flooded by water. This water in the trenches remains stored even when river becomes dry after monsoon is over. These trenches with full of water are termed by me as LARGE WATER TANKS IN THE RIVER BED. This concept of storing water may solve the problem of water in Sahelian Zone of Africa.The concept explained in detail runs into 7 pages which I cannot type due to space limitations