CHAPTER 3 DRAINAGE

Q1. Choose the right answer from the four alternatives given

i.In which of the following states the Wular lake located:

Ans. d) J&K.

ii. The river Narmada has its source at:

Ans. d) Slopes of the Western Ghats

iii. Which one of the following lakes is a salt water

Ans. b) Sambhar

iv. Which one of the following is the longest river of the peninsular india 

Ans. C) Godavari

v. Which one of the following river flows through rift valley

d) Tapi

Q2. Answer the following questions briefly.

i. What is meant by a water divide. Give an example.

Ans. When an elevated area, such as a mountain or an upland, separates two drainage basins. Such an, upland is known as a water divide.

ii. Which is the largest river Basin in India.

Ans.Ganga is the largest river basin in India.

iii. Where do the rivers Indus and Ganga have their origin.

Ans. The river Indus have origin in Tibet, near lake Mansarovar.

The river Ganga have its origin from Gangotri glacier.

iv. Name the two head streams of the Ganga. Where do they meet to form the Ganga?

Ans. Bhagirathi & Alaknanda are the two head streams of the Ganga. They meet at Haridwar to form the Ganga.

v. Why does the Brahamputra in its Tibetan part have less silt, despite a longer coarse.

Ans. In Tibet the Brahamputra carries less silt as it is a cold, dry area& flows in a smaller volume of water.

vi. Which two peninsular rivers flow through trough.

Ans. The two peninsular rivers flow through trough are Narmada and Tapi river.

vi. Sate some economic benefits of rivers and lakes.

Ans.Rivers and lakes have been of fundamental importance throughout the
human history, water from the rivers is a basic natural resource. Using
rivers for irrigation, navigation, hydroelectricity is of special significance

Q3. Say weather the following water bodies are natural or mam made

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
I. Pulicat
m. Nagarjuna sagar
n. Hirakund

Ans.

natural

natural

natural

natural

Human-

natural

natural

natural

natural

Man-made

Man-made

natural

Man-made

Man-made

Q4. Discuss the significant difference between the Himalayan and the peninsular rivers?

Ans:-

Himalayan rivers

1. Most of the Himalayan rivers are perennial it means they have water through out the year

2. They originates from the lofty northern Himalyans.

3. They are long rivers.

4. They have large flow of water in their Chantal's.

5. They got water from glaciers as well as rain fall.

6. Examples are Indus, Ganga, Brahamputra etc.

Peninsular Rivers

1.Most of the peninsular Rivers are seasonal in nature

2.They originate from the Peninsula

3. They are short rivers.

4. They have reduced flow of water in their channels. Jharkhand, Karnataka etc. 

5. They got water mostly from rain flow.

6. Examples are Narmada Mahandi and Tapi basin.

Q5. Compare the eats flowing and the west flowing rivers of the Peninsular plate?

Ans.

East flowing rivers

1. The east flowing rivers such as, Mahanadi, the Godawari, the Krishna and the Kaveri drains into bay of Bengal.

2. The rivers make deltas at their mouths.

3. The basin of Eastern flowing rivers are large.

4. the tributaries of the east flouting rivers are long.

5. The basis of east flowing rivers covers Maharashtra, MP, Orissa, Andhra Pradesh, Jharkhand , Karnataka

West flowing rivers

1. The West flowing rivers such as Narmada and the Tapi Drain into the Arabian Sea. peninsula. 

2.These rivers make actuaries at their mouths.

3. The basin of west flowing rivers are smaller as compare to east flowing rivers.

4. The tributaries rivers west flowing rivers are very short.

5. The basin of East flowing covers M.P Gujarat and Maharashtra.

Q6. Why are rivers important for the country's economy.

Ans.Rivers are important for the country's economy because the water of rivers is used for the agricultural and the industrial purposes. The rivers are the important sources for the generation of hydroelectricity which is the backbone of our industrial progress