NCERT Book Class 9 Geography Contemporary India Drainage

Social Science
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NCERT Class 9 Social Science Contemporary India Chapter 3 Drainage

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Download Contemporary India Chapter 3 Drainage - NCERT Class 9 Textbook

The term drainage describes the river system of an area. Look at the physical map. You will notice that small streams flowing from different directions come together to form the main river, which ultimately drains into a large water body such as a lake or a sea or an ocean. The area drained by a single river system is called a drainage basin. A closer observation on a map will indicate that any elevated area, such as a mountain or an upland, separates two drainage basins. Such an upland is known as a water divide (Figure 3.1).
 
NCERT Class 9 Geography Contemporary India Drainage
 
 
DRAINAGE SYSTEMS IN INDIA
 
The drainage systems of India are mainly controlled by the broad relief features of the subcontinent. Accordingly, the Indian rivers are divided into two major groups:
• the Himalayan rivers; and
• the Peninsular rivers.
Apart from originating from the two major physiographic regions of India, the Himalayan and the Peninsular rivers are different from each other in many ways. Most of the Himalayan rivers are perennial. It means that they have water throughout the year. These rivers receive water from rain as well as from melted snow from the lofty mountains. The two major Himalayan rivers, the Indus and the Brahmaputra originate from the north of the mountain ranges. They have cut through the mountains making gorges. The Himalayan rivers have long courses from their source to the sea.
 
NCERT Class 9 Geography Contemporary India Drainage-
 
 
 
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NCERT Book for Class 9 Social Science Contemporary India Chapter 3 Drainage

Official NCERT E-Textbook: Contemporary India Chapter 3 Drainage (NCERT)

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