Drainage: Questions and Answers
Q1(CBSE 2010): Which one of the following describes the drainage patterns resembling the branches of a tree?
(a) Radial
(b) Dendritic
(c) Centrifugal
(d) Trellis
Q2: In which of the following states is the Wular lake located?(a) Rajasthan
(b) Uttar Pradesh
(c) Punjab
(d) Jammu and Kashmir
Q3: The river Narmada has its source at(a) Satpura
(b) Brahmagiri
(c) Amarkantak
(d) Slopes of the Western ghats
Q4(CBSE 2011): In which course of a river meanders are formed?
(a) Upper course
(b) Middle course
(c) Lower course
(d) Both upper & middle
Q5(NCERT/CBSE 2010): Which one of the following lakes is a saltwater lake?
(a) Sambhar
(b) Dal
(c) Wular
(d) Gobind Sagar
Q6(CBSE 2010): In which of the following states is Sambhar Lake situated?
(a) Rajasthan
(b) Uttar Pradesh
(c) Bihar
(d) Jammu and Kashmir
Q7(CBSE 2010): Which among the following rivers flows through a rift valley?
(a) Damodar
(b) Tungabhadra
(c) Krishna
(d) Tapi
Q8(NCERT): Which one of the following is the longest river of Peninsular India?
(a) Narmada
(b) Krishna
(c) Godavari
(d) Mahanadi
Q9(CBSE 2011): Which is the largest freshwater lake in India?
(a) Wular lake
(b) Dal lake
(c) Bhimtal Lake
(d) Loktak
Q10: Which of the following rivers is known as the ‘Dakshin Ganga’?
(a) The Kaveri
(b) The Narmada
(c) The Krishna
(d) The Godavari
Q11(CBSE 2010): Which kind of a drainage pattern is formed when tributaries join rivers at almost right angles?
(a) Dendritic drainage
(b) Trellis drainage
(c) Rectangular drainage
(d) Radial drainage
Q12: Which one of the following rivers has the largest drainage pattern in India?
(a) The Indus
(b) The Ganga
(c) The Brahmaputra
(d) The Mahanadi
Q13: Which among the following do not share the drainage basin of river Mahanadi?
(a) Orissa
(b) Jharkhand
(c) Madhya Pradesh
(d) Chhatisgarh
Answers:
1: (b) Dendritic
2: (d) Jammu and Kashmir
3: (c) Amarkantak
4: (b) Middle course
5: (a) Sambhar
6: (a) Rajasthan 7: (d) Tapi
8: (c) Godavari
9: (a) Wular lake
10: (d) The Godavari
11: (b) Trellis drainage
12: (b) The Ganga
13: (c) Madhya Pradesh
Question14: Name the four groups of river systems found in India?
Answer:
① Himalayan rivers,
② Deccan rivers,
③ Coastal rivers and
④ Rivers of the inland drainage basin.
Question15: Distinguish between rivers of the North and South of India.
Answer: See the answer in this post (Drainage -Peninsular and Himalayan rivers.)
Question16: Name the different drainage patterns formed by the streams.
Answer: The streams within a drainage basin form certain patterns, depending on the slope of the land, rock structure and the climatic conditions of the area.
Drainage patterns are divided into four categories:
① Dendrite pattern
② Trellis pattern
③ Radial pattern
④ Rectangular pattern
Drainage Patterns
① Dendrite pattern:
It consists of a single mainstream with tributaries resembling the branches of a tree. It develops when the river channel follows the slope of the terrain. e.g. Ganga
② Trellis Pattern:
When tributaries join the mainstream at right angles, a pattern is called trellis. A trellis drainage pattern develops where hard and soft rocks exist parallel to each other. For example the Narmada.
③ Radial Pattern:
In this pattern, the streams flow in different directions from a central peak or dome-like structure forming a radial pattern.
④ Rectangular Pattern:
It develops on a strongly joint rocky terrain. In this, the mainstream and its tributaries join at right angles.
Question17: Name the two Himalayan river systems.
Answer: Indus and the Ganga-Brahmaputra-Meghna system
Question18: Write a short note on the Indus River system.
Answer:
The Indus River rises from Tibet near Mansarover lake. It flows westwards and enters India in the Ladakh district of Jammu and Kashmir.
Several tributaries like the Zaskar, Nubra, Shyok and Hunza join it in Kashmir Region.
The Indus flows through Baltistan and Gilgit and emerges from the mountains at Attock.
The Sutlej, Beas, Ravi, Chenab and Jhelum join together the Indus near Mithankot in Pakistan.
The Indus flows southward till it reaches the Arabian Sea East of Karachi Port in Pakistan.
It has a total length of 2900 km and it is one of the longest rivers of the world.
Question19: Write a short note on the Ganga River system.
Answer:
(i) The headwaters of the Ganga, called the Bhagirathi, is fed by the Gangotri glacier and joined by the Alaknanda at Devaprayag in Ifttaralchand. At Haridwar, the Ganga emerges from the mountains on to the plains.
(ii) The Ganga is joined by many tributaries from the Himalayas. These are the Yamuna, the Ghaghara, the Gandak and the Kosi.
(iii) The river Yamuna flows parallel to the Ganga and as a right-bank tributary, meets the Ganga at Allahabad.
(iv) The Ghaghara, the Gandak and the Kosi rise in the Nepal Himalayas. The main tributaries which come from the peninsular uplands are the Chambal, the Betwa and the Son.
(v) Enlarged with the water from its right and left bank tributaries, the Ganga flows eastwards till Farakka in West Bengal. The length of the Ganga is over 2500 km. Ambala is located on the water divide between the Indus and the Ganga river systems.
(vi) The mainstream flows southwards into Bangladesh and is joined by the Brahmaputra.
(vii) The Ganga and the Brahmaputra flow into the Bay of Bengal and form the world's largest and fastest-growing Delta known as the Sundarbans delta.
The Jamuna, the Ghagra, the Gandak, and the Kosi.
These rivers cause widespread floods in the Northern Plains every year and cause widespread damage to life and property. But the rivers also enrich the soil for agriculture.
* Peninsular tributaries:
Chambal, Betwa and the Son rise from semi-arid areas and have short courses. They do not carry much water with them.
Question20: Write a short note on the Brahmaputra River system.
Answer:
The Brahmaputra River System
⑴ The Brahmaputra rises in Tibet east of Mansarovar Lake very close to the source of Indus and Sutlej.
⑵ It flows eastward parallel to the Himalayas. On reaching Namcha Barwa (7757 meters), it takes a U-turn and enters India in Arunachal Pradesh through a gorge. Here it is called the Dihang.
⑶ The Dibang, the Lohit and many other tributaries join the Dihang to form the Brahmaputra in Assam.
⑷ InTibett, the river carries a small volume of water and less tilt as it is a cold and dry area.
⑸ In India, it passes through a region of high rainfall. Here, the river carries a large volume of water and a considerable amount of silt.
⑹ The Brahmaputra has a braided channel in its entire length in Assam and forms many riverine islands.
⑺ It causes widespread devastation due to floods in Assam and Bangladesh.
⑻ Unlike the other Indian rivers of North, this river is marked by huge deposits of silt on its bed causing the river bed to rise.
⑼ The river also shifts its channel frequently.
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Q1(CBSE 2010): Which one of the following describes the drainage patterns resembling the branches of a tree?
(a) Radial
(b) Dendritic
(c) Centrifugal
(d) Trellis
Q2: In which of the following states is the Wular lake located?(a) Rajasthan
(b) Uttar Pradesh
(c) Punjab
(d) Jammu and Kashmir
Q3: The river Narmada has its source at(a) Satpura
(b) Brahmagiri
(c) Amarkantak
(d) Slopes of the Western ghats
Q4(CBSE 2011): In which course of a river meanders are formed?
(a) Upper course
(b) Middle course
(c) Lower course
(d) Both upper & middle
Q5(NCERT/CBSE 2010): Which one of the following lakes is a saltwater lake?
(a) Sambhar
(b) Dal
(c) Wular
(d) Gobind Sagar
Q6(CBSE 2010): In which of the following states is Sambhar Lake situated?
(a) Rajasthan
(b) Uttar Pradesh
(c) Bihar
(d) Jammu and Kashmir
Q7(CBSE 2010): Which among the following rivers flows through a rift valley?
(a) Damodar
(b) Tungabhadra
(c) Krishna
(d) Tapi
Q8(NCERT): Which one of the following is the longest river of Peninsular India?
(a) Narmada
(b) Krishna
(c) Godavari
(d) Mahanadi
Q9(CBSE 2011): Which is the largest freshwater lake in India?
(a) Wular lake
(b) Dal lake
(c) Bhimtal Lake
(d) Loktak
Q10: Which of the following rivers is known as the ‘Dakshin Ganga’?
(a) The Kaveri
(b) The Narmada
(c) The Krishna
(d) The Godavari
Q11(CBSE 2010): Which kind of a drainage pattern is formed when tributaries join rivers at almost right angles?
(a) Dendritic drainage
(b) Trellis drainage
(c) Rectangular drainage
(d) Radial drainage
Q12: Which one of the following rivers has the largest drainage pattern in India?
(a) The Indus
(b) The Ganga
(c) The Brahmaputra
(d) The Mahanadi
Q13: Which among the following do not share the drainage basin of river Mahanadi?
(a) Orissa
(b) Jharkhand
(c) Madhya Pradesh
(d) Chhatisgarh
Answers:
1: (b) Dendritic
2: (d) Jammu and Kashmir
3: (c) Amarkantak
4: (b) Middle course
5: (a) Sambhar
6: (a) Rajasthan 7: (d) Tapi
8: (c) Godavari
9: (a) Wular lake
10: (d) The Godavari
11: (b) Trellis drainage
12: (b) The Ganga
13: (c) Madhya Pradesh
Question14: Name the four groups of river systems found in India?
Answer:
① Himalayan rivers,
② Deccan rivers,
③ Coastal rivers and
④ Rivers of the inland drainage basin.
Question15: Distinguish between rivers of the North and South of India.
Answer: See the answer in this post (Drainage -Peninsular and Himalayan rivers.)
Question16: Name the different drainage patterns formed by the streams.
Answer: The streams within a drainage basin form certain patterns, depending on the slope of the land, rock structure and the climatic conditions of the area.
Drainage patterns are divided into four categories:
① Dendrite pattern
② Trellis pattern
③ Radial pattern
④ Rectangular pattern
Drainage Patterns
① Dendrite pattern:
It consists of a single mainstream with tributaries resembling the branches of a tree. It develops when the river channel follows the slope of the terrain. e.g. Ganga
② Trellis Pattern:
When tributaries join the mainstream at right angles, a pattern is called trellis. A trellis drainage pattern develops where hard and soft rocks exist parallel to each other. For example the Narmada.
③ Radial Pattern:
In this pattern, the streams flow in different directions from a central peak or dome-like structure forming a radial pattern.
④ Rectangular Pattern:
It develops on a strongly joint rocky terrain. In this, the mainstream and its tributaries join at right angles.
Question17: Name the two Himalayan river systems.
Answer: Indus and the Ganga-Brahmaputra-Meghna system
Question18: Write a short note on the Indus River system.
Answer:
The Indus River rises from Tibet near Mansarover lake. It flows westwards and enters India in the Ladakh district of Jammu and Kashmir.
Several tributaries like the Zaskar, Nubra, Shyok and Hunza join it in Kashmir Region.
The Indus flows through Baltistan and Gilgit and emerges from the mountains at Attock.
The Sutlej, Beas, Ravi, Chenab and Jhelum join together the Indus near Mithankot in Pakistan.
The Indus flows southward till it reaches the Arabian Sea East of Karachi Port in Pakistan.
It has a total length of 2900 km and it is one of the longest rivers of the world.
Question19: Write a short note on the Ganga River system.
Answer:
(i) The headwaters of the Ganga, called the Bhagirathi, is fed by the Gangotri glacier and joined by the Alaknanda at Devaprayag in Ifttaralchand. At Haridwar, the Ganga emerges from the mountains on to the plains.
(ii) The Ganga is joined by many tributaries from the Himalayas. These are the Yamuna, the Ghaghara, the Gandak and the Kosi.
(iii) The river Yamuna flows parallel to the Ganga and as a right-bank tributary, meets the Ganga at Allahabad.
(iv) The Ghaghara, the Gandak and the Kosi rise in the Nepal Himalayas. The main tributaries which come from the peninsular uplands are the Chambal, the Betwa and the Son.
(v) Enlarged with the water from its right and left bank tributaries, the Ganga flows eastwards till Farakka in West Bengal. The length of the Ganga is over 2500 km. Ambala is located on the water divide between the Indus and the Ganga river systems.
(vi) The mainstream flows southwards into Bangladesh and is joined by the Brahmaputra.
(vii) The Ganga and the Brahmaputra flow into the Bay of Bengal and form the world's largest and fastest-growing Delta known as the Sundarbans delta.
(viii) The gradient slope of the river is very gentle, a fall off just 1 metre for every 6 km. Therefore the river develops large meanders.
* Himalayan tributaries:The Jamuna, the Ghagra, the Gandak, and the Kosi.
These rivers cause widespread floods in the Northern Plains every year and cause widespread damage to life and property. But the rivers also enrich the soil for agriculture.
* Peninsular tributaries:
Chambal, Betwa and the Son rise from semi-arid areas and have short courses. They do not carry much water with them.
Question20: Write a short note on the Brahmaputra River system.
Answer:
The Brahmaputra River System
⑴ The Brahmaputra rises in Tibet east of Mansarovar Lake very close to the source of Indus and Sutlej.
⑵ It flows eastward parallel to the Himalayas. On reaching Namcha Barwa (7757 meters), it takes a U-turn and enters India in Arunachal Pradesh through a gorge. Here it is called the Dihang.
⑶ The Dibang, the Lohit and many other tributaries join the Dihang to form the Brahmaputra in Assam.
⑷ InTibett, the river carries a small volume of water and less tilt as it is a cold and dry area.
⑸ In India, it passes through a region of high rainfall. Here, the river carries a large volume of water and a considerable amount of silt.
⑹ The Brahmaputra has a braided channel in its entire length in Assam and forms many riverine islands.
⑺ It causes widespread devastation due to floods in Assam and Bangladesh.
⑻ Unlike the other Indian rivers of North, this river is marked by huge deposits of silt on its bed causing the river bed to rise.
⑼ The river also shifts its channel frequently.
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ഈ ബ്ലോഗിലെ എല്ലാ പോസ്റ്റുകളും ഒരുമിച്ച് കാണാനും ആവശ്യമുള്ളവ എളുപ്പത്തിൽ തിരഞ്ഞെടുക്കാനും ഇവിടെ ക്ലിക്കുക.
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