This PSEB 9th Class Social Science Notes Geography Chapter 3a India: Drainage will help you in revision during exams.
PSEB 9th Class Social Science Notes Geography Chapter 3a India: Drainage
→ Drainage system: Major rivers and their tributaries of a particular region form a definite pattern of drainage. This pattern is called the drainage system of that region.
→ Tributaries: The river which gets submerged in the main river is called the tributary of that main river.
→ Major Rivers of India: Major rivers of India can be divided into two main parts i.e. Himalayan rivers and rivers of Peninsular Plateau.
→ Major Himalayan rivers are Indus, Ganga and Brahmaputra. The major rivers of the peninsular plateau are Kaveri, Krishna, Godavari, Tapti, and Narmada.
→ Lakes: Major lakes in India are Dal, Wooler, Sambhar, Chilka, Pulikat, etc.
→ They get water either from rain or from the melting ice of glaciers.
→ Few lakes are quite important from an entertainment point of view.
→ Importance of Rivers: Rivers give us water to drink and for irrigation.
→ We can get hydroelectricity by making dams on rivers.
→ River pollution: Throwing of unnecessary particles and chemicals in river water creates river pollution. Then, this water is not fit for human consumption.
→ Ways to stop river pollution: Proper utilization of river water, making borders at agricultural fields and by making National Water Grid, we can stop river pollution.