RBSE Class 9 Social Science Important Questions Geography Chapter 3 Drainage

Rajasthan Board RBSE Class 9 Social Science Important Questions Geography Chapter3 Drainage Important Questions and Answers. 

RBSE Class 9 Social Science Important Questions Geography Chapter 3 Drainage

Multiple Choice Questions:

Question 1.
Which one of the following describes the drainage patterns resembling the branches of a tree?
(a) Radial 
(b) Centrifugal 
(c) Dendritic 
(d) Trellis
Answer:
(c) Dendritic 

Question 2. 
Which one of the following lakes is a salt water lake?
(a) Sambhar 
(b) Wular 
(c) Dal 
(d) Gobind Sagar
Answer:
(a) Sambhar 

Question 3. 
Which one amongst the following rivers flows through a rift valley?
(a) Mahanadi 
(b) Krishna 
(c) Tungabhadra 
(d) Tapi
Answer:
(d) Tapi

Question 4. 
Name the city at which the Ganga enters the plains from the Himalayas
(a) Haridwar 
(b) Prayag 
(c) Himachal 
(d) West Bengal
Answer:
(a) Haridwar 

Question 5. 
Which one of the following river rises in the highlands of Chhattisgarh?
(a) Mahanadi 
(b) Krishna 
(c) Tapi 
(d) Damodar
Answer:
(a) Mahanadi 

Question 6. 
Name the northernmost point of the Ganga delta
(a) Farakka 
(b) Chambal 
(c) Allahabad 
(d) Bangladesh
Answer:
(a) Farakka 

Question 7. 
By what name Brahmaputra is known in Tibet?
(a) Jamuna 
(b) Dibang 
(c) Tsang Po 
(d) Dihang
Answer:
(c) Tsang Po 

Question 8. 
The river Krishna has its source at
(a) Mansarowar 
(b) Mahabaleshwar 
(c) Marble rocks 
(d) Dhuadhar falls
Answer:
(b) Mahabaleshwar 

Question 9. 
Which of the lake is a result of the tectonic activities
(a) Wular 
(b) Chilika 
(c) Pulicat 
(d) Dal
Answer:
(a) Wular 

Question 10. 
Name the largest ‘Delta’ formed by river Ganga and Brahmaputra
(a) Sundarban delta 
b) Kaveri delta 
(c) Cooum delta 
(d) Indus delta
Answer:
(a) Sundarban delta 

Question 11. 
Name the biggest waterfall in India
(a) Jog Falls 
(b) Dudhsagar Falls 
(c) Vantaung Falls 
(d) Tholaiyar Falls
Answer:
(b) Dudhsagar Falls 

Question 12. 
In which year Ganga Action Plan (GAP) was initiated?
(a) 1985 
(b) 2000 
(c) 1979 
(d) 2001
Answer:
(a) 1985 

Question 13. 
Which of the following is an artificial lake '
(a) Dal lake 
(b) Nainital lake 
(c) Gobind Sagar 
(d) Chilika lake
Answer:
(c) Gobind Sagar 

Question 14. 
Satluj, the Beas, the Ravi, the Chenab and the Jhelum are the tributaries of the following river
(a) Ganga 
(b) Brahmaputra 
(c) Indus 
(d) Mahanadi
Answer:
(c) Indus 

Question 15. 
Which one of the following describes a patterns where hard and soft rocks exist parallel to each other
(a) Rectangular 
(b) Radial 
(c) Trellis 
(d) Dendritic
Answer:
(c) Trellis 

Question 16. 
Sivasamudram’ water fall is made from this river ;
(a) Kaveri 
(b) Mahanadi 
(c) Tapi 
(d) Godavari
Answer:
(a) Kaveri 

Question 17. 
The confluence of Bhagirathi and Alaknanda takes place at
(a) Bangladesh 
(b) Haridwar 
(c) Devaprayag 
(d) Amarkantak 
Answer:
(c) Devaprayag 

Fill in the blanks:

Question 1. 
River Narmada has its source at ................
Answer: 
Amarkantak

Question 2. 
................is the longest river of the Peninsular India.
Answer: 
Godavari 

Question 3. 
The largest river basin in India is ................
Answer:
Ganga 

Question 4.
................is the largest freshwater lake.
Answer:
Ganga 

Question 5.
................river is also known as the ‘Dakshin Ganga’.
Answer: 
Godavari

Question 6.
Sambhar lake is situated in ................ state.
Answer:
Rajasthan

Question 7. 
Total length of Indus river is ................ 
Answer:
2900 km.

True or False:

Question 1. 
According to Indus Water Treaty Pakistan can use 20 percent of total water carried by Indus river.
Answer:
False
Question 2. 
The world’s largest drainage basin is of Amazon river.
Answer:
True
Question 3. 
The Narmada river conservation mission has been taken by Maharashtra government.
Answer:
False

Question 4.
The Namami Gange Programmes is an integrated conservation mission approved by union government in 2014.
Answer:
True

Question 5. 
Source of Brahmaputra is near to sources of Ganga and Indus river.
Answer:
False

Question 6. 
The Malabar Coast in Maharashtra is known for its backwaters.
Answer:
True

Match the Column:

Column A	Column B
(1) Brahmputra	(a) Left bank tributary
(2) Ghaghara	(b) Right bank tributary of ganga
(3) Satluj	(c) Rises blose to the Indus
(4) Yamuna	(d) Tributary of Indus

Answer:

Column A	Column B
(1) Brahmputra	(c) Rises blose to the Indus
(2) Ghaghara	(a) Left bank tributary
(3) Satluj	(d) Tributary of Indus
(4) Yamuna	(b) Right bank tributary of ganga

 

Column A	Column B
(1) Wular Lake	(a) Meghalaya
(2) Barapani Lake	(b) Andhra Pradesh
(3) ChilikaLake	(c) Jammu and Kashmir
(4) KolleruLake	(d) Odisha

Answer:

Column A	Column B
(1) Wular Lake	(c) Jammu and Kashmir
(2) Barapani Lake	(a) Meghalaya
(3) ChilikaLake	(d) Odisha
(4) KolleruLake	(b) Andhra Pradesh

Ganga flows into Bangladesh where it is called the Padma river. The Padma is then joined by the Jamuna river. Further downstream, it is known as the Meghna

Very Short Answer Type Questions :

Question 1. 
What are perennial rivers? Give two examples.
Answer: 
Perennial rivers are those which have water throughout the year. These rivers receive water from rain as well as from melted snow of the mountains. Example: The Ganga river, the Indus river and the Brahmaputra river.

Question 2. 
What do you understand by seasonal rivers? Give two examples.
Answer: 
Seasonal rivers are those which are dependent upon rainfall for their flow. During the dry season, even the large seasonal rivers have reduced the flow of water. Example : The Mahanadi river, the Godavari river, the Narmada river

Question 3. 
What is the source and mouth of a river?
Answer: 
The point at which the river originates is called its source. It is the furthest place in the river. The place where a river enters a lake, larger river, or the ocean and ends its journey, is known as the mouth of the river.

Question 4. 
Why does the Ganga develop large meanders?
Answer: 
The Ganga plain from Ambala to the Sunderban has a long stretch of over nearly 1,800 km. However* its slope falls at a very low variation. It is a fall of just one metre for every 6 km. Therefore, the Ganga River develops large meanders.

Question 5. 
Why is the river Godavari often referred to as Dakshin Ganga?
Answer: 
The Ganga is the largest river of India with the largest drainage basin. Similarly, the Godavari is the largest river of Peninsular India with the largest drainage basin. Therefore, the Godavari is often referred to as Dakshin Ganga.

Question 6. 
What are salt water lakes? Give example of a saltwater lake in India.
Answer: 
The lakes that have a significantly higher concentration of salts are called the salt water lakes. The Sambhar lake in Rajasthan is a salt-water lake. Their water is used to produce salt.

Question 7. 
Give one feature of Tsangpo and Jamuna.
Answer: 
Tsangpo carries a smaller volume of water and less silt in the cold and diy areas in Tibet. Jamuna carries a lot of water in Bangladesh and spreads silt in the riverbed.

Question 8. 
Name any two picturesque locations formed by Narmada river.
Answer: 
The two picturesque locations formed by the Narmada are :
Marble Rocks, near Jabalpur where the Narmada flows through a deep gorge, and the Dhuadhar falls where the river narrows down and creates a waterfall.

Question 9. 
What is the river system of an area called?
Answer: 
Drainage

Question 10. 
What is the area drained by a single river system is called?
Answer: 
A drainage basin 

Question 11. 
What is an elevated area separating two drainage basins called?
Answer: 
A water divide

Question 12. 
Where does the Indus river originate?
Answer: 
Near Lake Mansarowar in Tibet.

Question 13. 
Where does the Indus river enters India?
Answer: 
In the Ladakh district of Jammu and Kashmir.

Question 14. 
Near which place does the Satluj, the Beas, the Ravi, the Chenab and the Jhelum join together to enter the Indus?
Answer: 
Near Mithankot in Pakistan.

Question 15. 
What part of the of the Indus basin is located in India?
Answer: 
Slightly over a third part.

Question 16. 
Which treaty regulates the water division of the river Indus between India and Pakistan?
Answer:
The Indus Water Treaty of 1960.

Question 17. 
Name the place from where the river Ganga gets its name.
Answer: 
Devaprayag

Question 18.
 Where does the river Brahmaputra rise? ,
Answer: 
At least of Mansarowar lake in Tibet.

Question 19.
In which Indian state does the Brahmaputra river enter India from Tibet?
Answer: In Arunachal Pradesh.

Question 20.
What is the Brahmaputra river called in Arunachal Pradesh.
Answer:
Dihang

Question 21
What is the Brahmaputra river known as in Bangladesh?
Answer:
Jamuna

Question 22.
 Which is the main water divide in Peninsular India?
Answer:
 The Western Ghats

Question 23. 
Name the place where the Narmada river flows through a deep gorge. 
Answer: 
The Marble Rocks near Jabalpur.

Question 24.
 Name the waterfall created by the Narmada?
Answer: 
The Dhuadhar Falls
 
Question 25.
Where does the Tapi river rise?
Answer: 
In the Satpura ranges, in the Betid district of Madhya Pradesh

Question 26. 
Where does the Godavari river rise?
Answer: 
From the slopes of the Western Ghats in the Nasik district of Maharashtra 

Question 27.
Name any one large tributary of the Godavari river.
Answer: 
The Manjra/the Wainganga/ the Penganga

Question 28.
Name any one tributary of the Krishna river.
Answer: 
The Tungabhadra/the Koyna/the Ghataprabha/the Musi/the Bhima

Question 29.
Where does the Kaveri river rise?
Answer: 
In the Brahmagiri range of the Western Ghats

Question 30. 
At which place does the river Kaveri drain into the Bay of Bengal?
Answer: 
In south of Cuddalore, in Tamil Nadu

Question 31.
Which type of lake is developed from the cut-offs of a meandering river? 
Answer: The ox-bow lakes

Question 32. 
Give examples of lagoon.
Answer: 
The Chilika lake/the Pulicat lake/the Kolleru lake.

Question 33.
 Which lake has been built on the Bhakra Dam?
Answer: 
Guru Gobind Sagar

Question 34.
Name large lakes which are also called a sea.
Answer:
The Caspian Sea/the Dead Sea/the Aral Sea.

Short Answer Type Questions:

Question 1. 
Describe the erosional and depositional activities performed by the Himalayan rivers in the upper, middle and lower courses?
Answer: 
The Himalayan rivers perform intensive erosional activity in their upper courses. These rivers flow very quickly through the steep slopes of the mountains and cause a lot of erosion. They cut through the mountains forming deep valleys and gorges. They carry huge loads of eroded silt and sand with them to the lower regions having gentle slopes.

In their middle course and the lower courses, where the land is level and flat the rivers slow down and cause less erosion. They are unable to carry the load of sand and silt and begin to start depositing it in the floodplains. Here, they form many depositional features, such as meanders, ox-bow lakes and well-developed deltas.

Question 2.
Explain the journey of the river Ganga in its lower course.
Answer: 
Farakka in West Bengal is the northern most point of the Ganga delta. The Ganga splits here into two streams the Bhagirathi-Hooghly and the mainstream. The Bhagirathi-Hooghly flows southwards, forms the deltaic plain and eventually drains into the Bay of Bengal. The mainstream of the river which then flows into the Bay of Bengal. The delta formed by the Padma, Meghna and Brahmaputra is known as the Sunderban delta. The Sundarban delta is the world’s largest and fastest growing delta.

Question 3. 
Where are most of India’s freshwater lakes located and why?
Answer: 
Most of the freshwater lakes of India are located in the Himalayan region. The lofty ranges of the Himalayas are snow covered and have many glaciers. The glaciers dig out a basin which is later filled with slowly melting snow, thus resulting in the formation of freshwater lakes.Tectonic activity in the Himalayan region also results in the formation of depressions, which are later filled with melting snow forming freshwater lakes.

Question 4. 
Write a note on the Krishna river and its tributaries.
Answer: 
The river Krishna rises from a spring near Mahabaleshwar. It flows eastwards to the Bay of Bengal. It has a length of about 1400 km, which makes it the second longest river of Peninsular India after Godavari. The Tungabhadra, the Koyna, the Bhima, the Ghatprabha and the Musi are important tributaries of the river Krishna. The drainage basin of the river Krishna lies in Maharashtra, Karnataka and Andhra Pradesh.

Question 5. 
Describe the main features of Narmada basin.
Answer: 
The three main features of Narmada Basin are as follows:

1. The Narmada river emerges from the Amarkantak hills in Madhya Pradesh.
2. It flows towards the west in a rift valley. The river formed due to faulting.
3. The Narmada creates some beautiful, scenic locations on its way to the Arabian Sea. Such as The ‘Marble rocks’, near Jabalpur the ‘Dhuadhar falls’.
4. The tributaries of the Narmada are very short and most of these join the river at right angles.

Question 6. 
Write the differences and similarities between the Narmada and Tapi basins.
Answer:
Differences:

The Narmada Basin	The Tapi Basin
(i) The Narmada river originates in the Amarkantak hills in Madhya Pradesh.	The Tapi River originates in the Satpura ranges, in the Betul district of Madhya Pradesh.
(ii) The Narmada basin is spread over parts of Madhya Pradesh and Gujarat.	The Tapi basin is spread over parts of Madhya Pradesh, Gujarat and Maharashtra
(iii) The Narmada is much longer than the Tapi.	The Tapi is much shorter than the Narmada.

Similarities:

1. Both rivers flows westwards in a rift valley and drain into the Arabian Sea.
2. Both have trellis drainage pattern as they flow on hard and soft rocks lying parallel to each other.

Question 7. 
Where does the Kaveri river originate? Write some features of the Kaveri.
Answer:
The Kaveri originates in the Brahmagiri range of the Western Ghats. Some of the key features of the river are :

1. It is about 760 km long.
2. It drains into the Bay of Bengal in south of Cuddalore, in Tamil Nadu.
3. Amravati, Bhavani, Hemavati and Kabini are its main tributaries.
4. Its drainage basin covers parts of Karnataka, Kerala and Tamil Nadu.
5. It makes the second biggest waterfall in India, which is known as Jog falls. The fall supplies hydroelectric power to Mysore, Bengaluru and the Kolar Gold Field.

Question 8. 
What are the objectives of ‘NRCP’? Write a short note on it.
Answer: 

1. ‘NRCP’ means ‘National River Conservation Plan’. The main objective of NRCP is to improve the water quality of the rivers.
2. The river cleaning programme in the country was initiated with the launching of the Ganga Action Plan in 1985.
3. The Ganga Action Plan was expanded to cover other rivers under NRCP in the year 1995.

Question 9.
Enumerate any two features of Indian system,.
Answer:
(i) The drainage system of India are controlled by the broad relief features of the subcontinent.
(ii) The Indian rivers are divided into 2 major groups. 
(a) The Himalayan rivers.
(b) The Peninsular rivers.

Question 10. 
Write any three features of the Himalayan rivers.
Answer: 
Three features of the Himalayan rivers are as follows :

1. These originate in the Himalayas and drain into the northern plain.
2. Most of these rivers are perennial and receive water throughout the year from rainfall as well as from the melting snow.
3. These rivers have long courses and carry out lot of erosional activities in their upper courses.

Question 11.
Write any three features of the peninsular rivers.
Answer: 
Three features of the peninsular rivers are as follows:

1. Most of these rivers originate in the Western Ghats and flow towards the Bay of Bengal in the east.
2. Most peninsular rivers are seasonal, and are entirely dependent on rain. During the dry season,the flow of water reduces in the large rivers too.
3. Most peninsular rivers have short and shallow courses.

Question 12. 
Describe the Indus Water Treaty.
Answer: 
The Indus Water Treaty was signed by India and Pakistan in 1960. It regulates the sharing of the water of the Indus river between the two countries. It says India can use only 20 per cent of the total water carried by Indus river system.
This water is used for irrigation in Punjab, Haryana and the southern and the western parts of Rajasthan.

Question 13. 
What are the features of the Yamuna river?
Answer: 
The features of the Yamuna river are as follows :

1. Yamuna river originates from the Yamunotri glacier of the Himalayas.
2. It is the largest tributary of Ganga river.
3. It moves parallel to the Ganga for a long distance and finally meets it at Allahabad.
4. It is the right bank tributary of Ganga river.

Question 14. 
Name the three Himalayan river systems. Give two tributaries of each. 
Answer: 
The three Himalayan river systems and their tributaries of each are :

1. The Indus river system, with Satluj and Beas as its tributaries.
2. The Ganga river system, with Yamuna and Ghaghara as its tributaries.
3. The Brahmaputra river system, with Dibang and Lohit as its tributaries.

Question 15.
Describe any three important features of the river Brahmaputra.
Answer:
The three important features of the river Brahmaputra are as follows :

1. It passes through a high rainfall region and therefore carries a large volume of water and silt.
2. It has braided channel in its entire length in Assam and forms many riverine - islands.
3. In rainy season, the river overflows causing widespread flood in Assam and Bangladesh.

Question 16. 
What are the features of Sundarban delta?
Answer: 
The features of Sundarban delta are :

1. It is the world’s largest and fastest growing delta.
2. It derived its name from the mangrove trees, locally called as Sundari, which grow well in marshy land of the delta.
3. The Delta is the home of Royal Bengal Tiger.

Long Answer Type Questions:

Question 1. 
Describe about Himalayan river.
Or
Explain the drainage system of Indus river.
Or
Explain the drainage system of Ganga river.
Answer: 
Himalayan river- The major Himalayan rivers are (1) the Indus, (2) the Ganga and (3) the Brahmaputra. These rivers are long, and are joined by many large and important tributaries. They can be described as follows-

A. Indus River System:
(i) Origin : The river Indus rises in Tibet, near Lake Mansarowar and it enters India in the Ladakh district of Jammu and Kashmir. Indus is one of the longest rivers of the world.

(ii) Main Tributaries: 
Main tributaries of this river are the Zaskar, Nubra, Shyok, Hun^a, Jhelum, Chenab, Ravi and Beas river.

(iii) Water flow pattern: 
The Indus River flows west from its origin it enters India in the Ladakh district of Jammu and Kashmir. Later it flows through Baltistan and Gilgit and emerges from the mountains at Attock. Beyond this, the Indus flows southwards eventually reaching the Arabian Sea,
 east of Karachi.

(iv) Water and Area: 
It creates a gentle slope plain. A little over a third of the Indus basin is located in India and the rest is in Pakistan..

B.Ganga River System:
(i) Origin :
Ganga is the most prominent river of India. Gangotri glacier is the origin of river Ganga. The river Ganges is actually the confluence of the Bhagirathi and Alaknanda. Both these rivers joined at Devaprayag and form the river Ganga.

(ii) Main tributaries : 
In Ganga river system, the tributaries of the Ganga include the rivers Yamuna, Ghaghra, Gandak, Kosi etc. originating from the north and the Chambal, Betwa, Kalisindh, Son, etc. come from the peninsular upland.

(iii) Water flow pattern : 
The most prominent river of the Ganges river system, enters the plains near Haridwar. Ganga is joined by Yamuna near Allahabad, Gomti near Gajipur and Ghaghra near Chhapra. Main tributary of Ganga, Yamuna rises from the Yamunotri Glacier. Chambal, Betwa, Ken rivers meets Yamuna river. Ganga enters in Bangladesh near Farakka. Here it is known as Padma river, in the final stage Ganga and Brahmaputra are known as Meghna before they merge into the sea. Before falling into Bay of Bengal, Ganga joins river Brahmputra and form delta. The delta formed by these rivers is known as the Sundarban Delta which is world’s largest delta.

(iv) Slope and area: 
The length of the Ganga is over 2500 km. Its slope is very low.

(v) Making of meanders: Due to the decline in the slope of the river Ganges (1 metre for every 6 km), it develops large meanders.

C. Brahmaputra River System:
(i) Origin : 
The Brahmaputra rises in Tibet east of Mansarowar lake very dose to the sources of the Indus and the Satluj.

(ii) Main tributaries: 
Brahmaputra river is the major river of this river system. It’s main tributaries rivers are Dibang, Lohit and Kenula. Tista, Jhanji, Kulsi, Manas and Kopili etc are also tributaries river.

(iii) Water flow pattern :
It originates near Mansarowar lake and goes parallel towards the eastern end of the Himalayas. Here (Tibbet) it is known as Tsang Po. On reaching the Namcha Barwa it takes a ‘U5 turn and enters India in Arunachal Pradesh through a gorge. Here it is known as Dihang. After this it enters Bangladesh via Assam and joins Ganga river.

(iv) Riverine Island :
In Assam, the Brahmaputra flows in several streams and flows as braided river and forms many riverine island. In Assam . world’s largest riverine island Majoli is located in Brahmaputra river.

(v) Length and area s Brahmaputra river is slightly longer than Indus river. But most of its route is located outside India.

Question 2. 
Briefly describe about Peninsular rivers.
Answer: 
On the basis of their drainage area peninsular rivers can be divided in to two parts

A. Rivers flow westwards or drain into the Arabian Sea : 
Narmada and Tapi are the main river which drain in to Arabian sea. Their description is as follows

(i) Narmada Basin:
The Narmada rises in the Amarkantak hills in Madhya Pradesh. From there it flows into the rift valley. On its drainage area this river forms many picturesque locations. Near Jabalpur, It flows through deep gorges in marble rocks falls from a steep rocks to form a ‘Dhuadhar fall’. All tributaries of the Narmada are very short. They form a web-like pattern consisting of Narmada.

(ii) Tapi Basin:
The Tapi rises in the Satpura ranges, in the Betul district of Madhya Pradesh. It also flows in a rift valley. It is much shorter in length. Its basin covers parts of Madhya Pradesh, Gujarat and Maharashtra states.
The other west flowing rivers are Sabarmati, Mahi, Bharathpuzha and Periyar.

B. Rivers flow eastwards or drain into the Bay of Bengal : 
Godavari,Mahanadi, Krishna and Kaveri are main rivers.
(i) Godavari : 
It is the largest Peninsular river. It rises from the slopes of the Western Ghats in the Nasik district of Maharashtra. Its drainage basin is the largest among the peninsular rivers. It’s main tributaries are Puma, Wardha, Pranhita, Manjra, Wainganga and Penganga. Because of its length and the area it covers, it is also known as the Dakshin Ganga. The basin covers parts of Maharashtra Madhya Pradesh, Odisha and Andhra Pradesh.

(ii) Mahanadi : 
The Mahanadi rises in the highlands of Chhattisgarh. The length of the river is about 860 km. It covers part of Maharashtra, Chhattisgarh, Jharkhand, and Odisha.

(iii) Krishna River : 
This river rises from a spring near Mahabaleshwar. It’s length is about 1400 km. The Tungabhadra, the Koyana, the Ghatprabha, 
Drainage
the Musi and the Bhima are some of its tributaries. Its drainage basin is shared by Maharasthra, Karnataka and Andhra Pradesh. :

(iv) Kaveri river : 
The Kaveri rises in the Brahmagri range of the Western Ghats. Its, main tributaries are Amravati, Bhavani, Hemavati and Kabini. This river flows through parts of Karnataka, Kerala and Tamil Nadu. The Damoder, the Brahmani, the Baitami and the Subamrekha are some major rivers flowing towards the east.

Question 3. 
What do you understand by lakes? Describe about the lakes in India.
Answer: 
The trough of the surface of the earth in which water accumulates is called lakes Lakes in India - India has many lakes. These differ from each other in size and other characteristics. They are as follows
(i) Permanent or temporary/ Seasonal
(ii) Natural or manmade
(iii) Freshwater or saltwater

(i) Permanent or temporary lakes: 
Most lakes are permanent. Only some contain water during the rainy season such as- lakes in the basins of inland dr ainage of semi-arid regions. For example, the Sambhar lake in Rajasthan.

(ii) Natural or manmade lakes: 
Lakes formed due to natural activities are known as natural lakes. It involves glaciers, ice rocks, air, rivers and
geological activities. Spits and bars form natural lakes by forming lagoons in coastal areas. For example- Wular, Dal, Chilika etc. lakes.
Lakes are also formed by damming of the rivers by human. This is known as man made lakes. For example- Guru Gobind Sagar.

(iii) Fresh water or salt water lakes: 
lakes contain sweet water are called fresh water lakes and lakes contain saline water are called salt water lake. Mostly freshwater lakes are in Himalayan range. They are of glacial origin. Wular, Dal, Bhimtal, Nainital, Loktak and Barapani are some other important freshwater lakes. Chilika, Pulicat, Kolleru and Sambhar
etc lakes are saltwater lakes.