Why do rivers have no deltas on the western coast even though they transport a lot of sediments with them ?
Reasons for their failure are all apparent:
(i) Rugged, metamorphic rocks are in their beds hence, these flow in narrow passages. These being regions of old mountains and the table land, it is hard to cut-off the banks by these rivers and spread the silt carried by them to make it a delta. Bifurcation of three sides is nowhere possible for the channels of these rivers. Hence, we see basins as fertile as the deltas.
(ii) All tributaries of these rivers make trellis pattern because of their confluence at right angles.
(iii) We see basin formed by the rivers flowing on western coast (the Narmada and the Tapi rivers with their tributaries—Baiyer, Dudhi, Tawa, Hiran, Purna, Betul and Lavda). These basins cover Madhya Pradesh and Gujarat states. Similarly, the Tapi river has formed its basin in the parts of Madhya Pradesh, Gujarat and Maharashtra states.
We can ascribe the physical conditions responsible for deficiency of non-making deltas by these rivers.