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

NCERT Solutions for Class 9 Social Science Contemporary India Chapter 3 Drainage help students understand the river systems of India, including Himalayan and Peninsular rivers, lakes, and their importance. This chapter explains how rivers shape the landscape and support agriculture, transport, and human life.

Prepared according to the latest CBSE Class 9 Social Science syllabus, these solutions provide clear and structured answers to help students build strong concepts and perform well in exams.

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

Drainage
Medium
Q.
Choose the right answer from the four alternatives given below.
(i) In which of the following states is the Wular lake located?
(a) Rajasthan
(b) Uttar Pradesh
(c) Punjab
(d) Jammu and Kashmir

(ii) The river Narmada has its source at
(a) Satpura
(b) Brahmagiri
(c) Amarkantak
(d) Slopes of the Western Ghats

(iii) Which one of the following lakes is a saltwater lake?
(a) Sambhar
(b) Dal
(c) Wular
(d) Gobind Sagar

(iv) Which one of the following is the longest river of the Peninsular India?
(a) Narmada
(b) Krishna
(c) Godavari
(d) Mahanadi

(v) Which one amongst the following rivers flows through a rift valley?
(a) Mahanadi
(b) Tungabhadra
(c) Krishna
(d) Tapi
Drainage
Medium
Q.
Answer the following questions briefly.

(i) What is meant by a water divide? Give an example.
(ii) Which is the largest river basin in India?
(iii) Where do the rivers Indus and Ganga have their origin?
(iv) Name the two headstreams of the Ganga. Where do they meet to form the Ganga?
(v) Why does the Brahmaputra in its Tibetan part have less silt, despite a longer course?
(vi) Which two Peninsular rivers flow through trough?
(vii) State some economic benefits of rivers and lakes.
Drainage
Medium
Q.
Below are given the names of a few lakes of India. Group them under two categories– natural and created by human beings.

(a) Wular
(b) Dal
(c) Nainital
(d) Bhimtal
(e) Gobind Sagar
(f) Loktak
(g) Barapani
(h) Chilika
(i) Sambhar
(j) Rana Pratap Sagar
(k) Nizam Sagar
(l) Pulicat
(m) Nagarjuna Sagar
(n) Hirakund
Drainage
Medium
Q.
Discuss the significant difference between the Himalayan and the Peninsular Rivers.
Drainage
Medium
Q.
Compare the east flowing and the west flowing rivers of the Peninsular plateau.
Drainage
Easy
Q.
Why are rivers important for the country’s economy?
Drainage
Medium
Q.
On an outline map of India mark and label the following rivers: Ganga, Satluj, Damodar, Krishna, Narmada, Tapi, Mahanadi, and Brahmaputra.
Drainage
Medium
Q.
On an outline map of India mark and label the following lakes: Chilika, Sambhar, Wular, Pulicat, Kolleru.

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

Q1. Choose the correct answer

Ans:
(i) (d) Jammu and Kashmir
(ii) (c) Amarkantak
(iii) (a) Sambhar
(iv) (c) Godavari
(v) (d) Tapi

Q2. Answer the following questions briefly

(i) A water divide is an elevated land that separates two drainage basins. Example: Western Ghats.
(ii) The Ganga basin is the largest river basin in India.
(iii) Indus originates near Mansarovar Lake (Tibet) and Ganga from Gangotri Glacier.
(iv) Headstreams: Bhagirathi and Alaknanda, meet at Devaprayag.
(v) Brahmaputra carries less silt in Tibet due to less rainfall, but more in India due to heavy rains.
(vi) Narmada and Tapi flow through rift valleys.
(vii) Rivers and lakes provide irrigation, electricity, transport, fisheries, and tourism benefits.

Q3. Classify lakes

Ans:
Natural lakes: Wular, Dal, Nainital, Bhimtal, Loktak, Barapani, Chilika, Sambhar, Pulicat
Man-made lakes: Gobind Sagar, Rana Pratap Sagar, Nizam Sagar, Nagarjuna Sagar, Hirakud

Q4. Difference between Himalayan and Peninsular rivers

Ans:

  • Himalayan Rivers: Snow-fed, perennial, long, large basins
  • Peninsular Rivers: Rain-fed, seasonal, shorter, smaller basins

Q5. Compare east and west flowing rivers

Ans:

  • East-flowing rivers: Drain into Bay of Bengal, form deltas, longer
  • West-flowing rivers: Drain into Arabian Sea, form estuaries, shorter

Q6. Importance of rivers

Ans:
Rivers are important because they support agriculture, transport, hydroelectricity, industry, and settlements, and are essential for economic development.

FAQs – Class 9 Geography Chapter 3 Drainage

Q1. What is a drainage system?
A drainage system refers to the network of rivers and their tributaries in a region.

Q2. Which is the largest river basin in India?
The Ganga river basin is the largest in India.

Q3. What is the difference between perennial and seasonal rivers?
Perennial rivers flow throughout the year, while seasonal rivers flow only during rainy seasons.

Q4. Why are rivers important?
Rivers are important for irrigation, transport, electricity, and supporting life.

Q5. Why is this chapter important for exams?
This chapter includes map-based, short answer, and conceptual questions, which are frequently asked in exams.