Question

Define water divide. What are the different patterns of flow made by a river ?

CBSE Class IX Social Science LA (5 Marks)

Answer 1

Water divide : An elevated area such as a mountain or an upland that separates two drainage basins is known as water divide. The four drainage patterns are as follows : (i) Dendritic-The dendritic patterns develop where the river channels follows the slope terrain. The stream with its tributaries resembles the branches of a tree, thus the name dendritic. (ii) Trellis-A river joined by its tributaries, at approximately right angles, develops a Trellis pattern. A Trellis drainage pattern develops where hard and soft rocks exist parallel to each other. (iii) Rectangular-A rectangular drainage pattern develops on a strongly-jointed rocky terrain. (iv) Radial-The radial pattern develops when streams flows in different directions from a central peak or dome-like structure.

Answer 2

Answer:

Water divide : An elevated area such as a mountain or an upland that separates two drainage basins is known as water divide. ... A Trellis drainage pattern develops where hard and soft rocks exist parallel to each other. (iii) Rectangular-A rectangular drainage pattern develops on a strongly-jointed rocky terrain.