What is drainage? What is water divide
Answers
Answer:
Drainage is the natural or artificial removal of a surface's water and sub-surface water from an area with excess of water.
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.
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