Question

Write about drainage
​

Answer 1

Explanation:

Drainage is the natural or artificial removal of a surface's water and sub-surface water from an area with excess of water.

Answer 2

${\huge{\bold{\red{\underline{Answer-}}}}}$

India is country of rivers. Here, more than 400 big and small rivers are found, which can be divided into 23 large and 200 small river basins. Differences in Drainage Pattern and water levels are found in these

In India, water mainly drains in two directions of the main water divide line. 90% of land water drains into Bay of Bengal and the rest drains into Arabian Sea.

. The Indian Drainage System is divided into 3 categories: (1) Major River Basin with catchment area up to 20000 sq. km. and above, accounts for 83% of the total run off and are 13 in number in India. (2) Medium River Basin with catchment area of 2000-20000 sq. km. and above accounts of 8% of the total run off all the rivers and are 45 in India. (3) Minor River Basin with catchment area up to 2000 sq. km. It accounts for 9% of the total run off among all the rivers with 55 basins in India.

On the basis of physiographic origin the Indian drainage may be distinguished as the Himalayan drainage and the peninsular drainage. Himalayan drainage system mainly comprises the basin areas of the Indus, the Ganga and the Brahmaputra. These are mostly perennial and youth having gorges, V-shaped valley and depositional features like Deltas.

Drainage is the process in which water leaches downward from the upper soil layers to lower layers, or how surface water is removed.