Question

explain drainage patterns.......

Answer 1

 Dendritic Drainage. A dendritic drainage pattern occurs when the tributary systems subdivides headway like the limbs of a tree.

A trellis drainage pattern occurs where subparallel streams erode a valley along the strike of less resistant formations. 

A radial drainage pattern occurs when the tributaries flow radially outward and downward from a central topographic high.

rectangular drainage pattern. A drainage pattern in which the main streams and their tributaries display many right-angle bends and exhibit sections of approx. the same length; it is indicative of streams following prominent fault or joint systems that break the rocks into rectangular blocks.