NCERT Solutions for Class 9 Social Science History Chapter 3
Social Science Class 9 History
Drainage 3
Important NCERT Questions Based on new NCERT Books for Session 2022-2023
Questions No: 2 Part: vii
State some economic benefits of rivers and lakes.
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Rivers and lakes offer crucial economic benefits:
1. Water Supply: Essential for agriculture, industries, and human consumption.
2. Transportation: Natural waterways aid cost-effective trade and transport.
3. Hydropower: Facilitate hydroelectricity, a renewable energy source.
4. Fishing Industry: Support livelihoods and provide protein through fishing.
5. Tourism: Attract tourists, generating revenue for local economies.
6. Biodiversity: Preserve diverse ecosystems, indirectly aiding economic activities.
7. Agricultural Fertility: Contribute to soil fertility, enhancing crop production and agricultural output.
The following table gives a comparison between the east flowing and the west flowing rivers of the Peninsular plateau:
East Flowing Rivers:
1. The Mahanadi, the Godavari, the Krishna, the Cauvery are the main east flowing rivers of Peninsular India.
2. These rivers drain in the Bay of Bengal.
3. These rivers make deltas at their mouth.
4. These rivers have a developed, large tributary system.
5. These river flow not through very deep canals.
West Flowing Rivers
1. The Narmada and the Tapi are the main west flowing rivers of Peninsular India.
2. These rivers drain in the Arabian sea.
3. These rivers enter the sea through estuaries.
4. These rivers are devoid of a developed tributary system. Their tributaries are quite small in size.
5. These rivers flow in troughs.
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Lake can be used for generating hydroelectricity. A lake can be a good tourist attraction. Rivers have been the centre of human civilization since ancient times. Even today, many big cities are situated on the bank of a river. River water is used for irrigation, navigation, hydroelectricity, fisheries, etc.
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