Last updated on August 30th, 2023 at 01:49 am
Class 9 Geography Chapter 3 Drainage Extra Question Answer
Q: What is the term used to describe the river system of an area?
A: The term used to describe the river system of an area is “drainage.”
Q: What is a drainage basin?
A: A drainage basin refers to the area drained by a single river system. It encompasses all the land and smaller streams that contribute water to a main river, which eventually flows into a larger water body such as a lake, sea, or ocean.
Q: What is a water divide?
A: A water divide, also known as an upland, is an elevated area such as a mountain that separates two drainage basins. It determines the direction in which the water from precipitation will flow and contributes to the formation of different river systems.
Q: What are the names of two large rivers in peninsular India that originate in the Western Ghats and flow towards the Bay of Bengal?
A: Two large rivers in peninsular India that originate in the Western Ghats and flow towards the Bay of Bengal are:
Godavari Rive and Krishna River.
Q: What are the major Himalayan rivers in India?
A: The major Himalayan rivers in India are the Indus, the Ganga, and the Brahmaputra.
Q: Where do the Chambal, Betwa, and Son rivers ultimately join the Ganga?
A: The Chambal, Betwa, and Son rivers ultimately join the Ganga in different locations:
The Chambal River joins the Yamuna River, which is a major tributary of the Ganga, near Etawah in Uttar Pradesh.
The Betwa River also joins the Yamuna River, but it does so near Hamirpur in Uttar Pradesh.
The Son River, on the other hand, joins the Ganga directly near Patna in Bihar.
Q: What happens to the Ganga river after it reaches Farakka in West Bengal?
A: After reaching Farakka in West Bengal, the Ganga river bifurcates. The Bhagirathi-Hooghly, a distributary, flows southwards through the deltaic plains to the Bay of Bengal. The mainstream of the Ganga continues to flow southwards into Bangladesh and is joined by the Brahmaputra River. Further downstream, the river is known as the Meghna, which ultimately flows into the Bay of Bengal.
Q: What is the name of the delta formed by the Ganga and Brahmaputra rivers?
A: The delta formed by the Ganga and Brahmaputra rivers is known as the Sundarban Delta. It is located in Bangladesh and is famous for its mangrove forests and diverse wildlife.
Q: What is the name of the world’s largest riverine island formed by the Brahmaputra?
A: The world’s largest riverine island formed by the Brahmaputra is Majuli.
Q: Which rivers flow west and make estuaries in Peninsular India?
A: The Narmada and the Tapi are the only long rivers in Peninsular India that flow west and make estuaries.
Q: Which states do the following west-flowing rivers drain into?
Sabarmati: The Sabarmati River drains into the state of Gujarat.
Mahi: The Mahi River drains into the states of Madhya Pradesh, Rajasthan, and Gujarat.
Bharathpuzha (also known as Nila): The Bharathpuzha River drains into the state of Kerala.
Periyar: The Periyar River drains into the state of Kerala.
Q: Which is the largest river in the Peninsular region of India?
A: The Godavari is the largest river in the Peninsular region of India.
Q: Which states are included in the Godavari River’s drainage basin?
A: The Godavari River’s drainage basin includes parts of Maharashtra, Madhya Pradesh, Odisha, and Andhra Pradesh.
Q: What is the other name for the Godavari River?
A: The Godavari River is also known as the Dakshin Ganga.
Q: Which states are included in the Mahanadi River’s drainage basin?
A: The Mahanadi River’s drainage basin includes Maharashtra, Chhattisgarh, Jharkhand, and Odisha.
Q: What are the major tributaries of the Krishna River, and which states are included in its drainage basin?
A: The major tributaries of the Krishna River are the Tungabhadra, the Koyana, the Ghatprabha, the Musi, and the Bhima. Its drainage basin includes Maharashtra, Karnataka, and Andhra Pradesh.
Q: Which states are included in the Kaveri River’s drainage basin?
A: The Kaveri River’s drainage basin includes parts of Karnataka, Kerala, and Tamil Nadu.
other hand, a heavy load of untreated sewage and industrial effluents are
Q: Name some notable smaller rivers flowing towards the east in India.
A: Some notable smaller rivers flowing towards the east in India are:
Damodar River
Brahmani River
Baitarani River
Subarnarekha River
Q: Name some important freshwater lakes in India.
A: Some important freshwater lakes in India are:
Wular Lake (Jammu and Kashmir)
Dal Lake (Jammu and Kashmir)
Bhimtal (Uttarakhand)
Nainital (Uttarakhand)
Loktak Lake (Manipur)
Barapani (Meghalaya)
Q: How do lakes benefit human beings?
A: Lakes have several benefits for human beings, including:
Regulation of river flow, preventing flooding during heavy rains and maintaining an even flow of water during dry seasons.
Use for hydropower generation.
Moderation of the climate in the surrounding areas.
Maintenance of aquatic ecosystems.
Enhancement of natural beauty.
Promotion of tourism and recreational activities.
Q: What are the challenges related to river pollution in India?
A: The challenges related to river pollution in India include:
Increasing demand for water, resulting in reduced river volume.
Discharge of untreated sewage and industrial effluents into rivers, affecting water quality.
Impact on the self-cleansing capacity of rivers.
Rising pollution levels in many rivers.
Launching of various action plans to clean the rivers due to concerns over pollution.
