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# Drainage System of India- Geography Practice Questions for IAS UPSC

Drainage System of India- Geography Practice Questions for IAS UPSC

Q1. Consider the following statements:

1. The world’s largest drainage basin is of Ganga River./गंगा की द्रोणी विश्व की  सबसे बड़ी द्रोणी है

2. The drainage pattern of an area depends upon geological time period, topography, amount of water flowing and the periodicity of the floor./किसी क्षेत्र का अपवाह तंत्र वहां के भूवैज्ञानिक समयावधि, चट्टानों की प्रकृति एवं सरंचना,स्थलाकृति,ढाल ,बहते जल की मात्रा और बहाव की अवधि का परिणाम है |

3. Drainage system is system of rivers which is spread over a particular area with specific water capacity./अपवाह  नदियों की प्रणाली है जो एक विशिष्ट क्षेत्र में विशिष्ट जल क्षमता के साथ बहती है |

Which of the above statement/s is/are correct?

(a) Only 1

(b) 1 and 2

(c) 2 and 3

(d) 1,2,3

Ans. C is correct.

• Statement 1 is not correct The world’s largest drainage basin is of Amazon River and the Ganga River has the largest basin in India.
• Statement 2 is correct The drainage pattern of an area is the outcome of the geological time period, nature and structure of rock, topography, slope, amount of water flowing and the periodicity of the floor.
• Statement 3 is correct The flow of water through well defined channels is known as drainage and the network of such channels is called drainage system.

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Q2. Consider the following statements about water divide:

1. It is also called as Drainage divide./इसे अपवाह विभाजक भी कहा जाता है

2. Water divide is noticeable in case of youthful topography and it is not easy to notice in plains .

3. In India, there are mainly five water divides./भारत में, मुख्य रूप से चार जल विभाजक है

Which of the above statement/s is/are correct?

(a) 1 and 2

(b) 2 and 3

(c) 1,2,3

(d) None

Ans. Option A is correct

• Statement 1 is correct  Any elevated area, such as a mountain or an upland which separates two drainage basins. Such an upland is called a water divide.It is also called Drainage divide.
• Statement 2 is correct Water divide is conspicuous in case of youthful topography and it is not well marked in plains .
• Statement 3 is not correct  In India, there are mainly four water divides:

Aravallis, Himalayas, Satpura and Vindhya Range, Western Ghats.

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Q3. Consider the following statements:

1. River basins and watershed are marked by Unity, any change in one part of the basin directly affects the other parts of watershed and the unit as a whole./नदी द्रोणी एवं जल-विभाजक एकता के परिचायक है इनके एक भाग में परीवर्तन का प्रभाव अन्य भागों व पूर्ण क्षेत्र में देखा जा सकता है |

2. Watersheds covers more area than river basins./क्षेत्रफल की दृष्टी से जल विभाजक बड़ी एवं द्रोणियां छोटे होती है |

3. The drainage pattern of an area depends upon the geological time period, topography and slope./किसी क्षेत्र का अपवाह तंत्र वहां के भूवैज्ञानिक समयावधि, स्थलाकृति, और बहाव की अवधि का परिणाम है |

Which of the above statement/s is/are true?

(a) Only 1

(b) 1 and 2

(c) 1 and 3

(d) 1,2,3

Ans. Option C is correct

• Statement 1 is correct  River basins and watershed are marked by Unity, what happens in one part of the basin or watershed directly affects the other parts and the unit as a whole.
• Statement 2 is not correct The catchments of large rivers are called river basins while those of a small rivulet and rails are known as watershed.Watersheds are small in area while the basins cover large area.
• Statement 3 is correct  The drainage pattern of an area is the result of the geological time period,Nature and structure of rocks,Topography,Slope.

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Q4. Find the correct matches:

Part A                                                             Part B

1. The drainage pattern resembling  —— Angular drainage

the branches of a tree ./

जो अपवाह प्रतिरूप पेड़ की शाखाओं के अनुरूप

हो उसे कोणीय द्रोणी पैटर्न  कहते है |

2. Bedrock joints and faults intersect ——–Dendritic drainage.

at more acute angles

than rectangular drainage patterns./

जहाँ आधार संधि एवं भ्रंशन एक दूसरे को आयताकार

प्रतिरूप की तुलना में अधिक  न्यून कोणों पर प्रतिच्छेद

करती हो वहां वृक्षाकार अपवाह बनता है

3. River originate from a hill and——–  Radial drainage.

flow in all directions/

जब नदी एक पहाड़ी से निकलर सभी

दिशाओं में प्रवाहित होती है तो इस प्रकार

बने प्रतिरूप को अरीय अपवाह प्रतिरूप  कहते है |

(a) Only 1

(b) 1 and 2

(c) Only 3

(d) 1,2,3

Ans. C is correct

• Match 1 is not correct  The drainage pattern resembling the branches of a tree is known as dendritic drainage.
• Match 2 is not correct Angular drainage patterns form where bedrock joints and faults intersect at more acute angles than rectangular drainage patterns.

Match 3 is correct  When the river originate from a hill and flow in all directions, the drainage pattern is known as Radial drainage.

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Q5. Consider the following statements :

1. Streams of Ladakh, Tibet, are the example of centripetal drainage./लद्दाख की धाराएं,नेपाल में बागमती अभिकेंद्री प्रतिरूप कहा जाता है |

2. Rivers of lesser Himalayas and rivers originating in the Western Ghats and flowing into Arabian Sea are the example of Parallel drainage/लघु हिमालय की नदियाँ एवं पश्चिमी घाट से निकलने वाली नदियाँ अरब सागर में गिरती है समांतर अपवाह  |

3. Narmada, Son and Mahanadi rivers originating from Amarkantak Hills are the example of centrifugal pattern./नर्मदा, सोन और महानदी जैसी नदियाँ अमरकंटक पहाड़ियों से निकलती है एवं ये अरीय प्रतिरूप का निर्माण करने वाली नदियों में शामिल है |

Which of the above statement/s is/are correct?

(a) only 2

(b) 1 and 2

(c) 2 and 3

(d) 1,2,3

Ans. D is correct

• Statement 1 is correct  Streams of Ladakh, Tibet, and the Baghmati and its tributaries in Nepal are the example of centripetal drainage.
• Statement 2 is correct Rivers flow parallel to each other for a long distance. E.g. River Ganga and Yamuna flow parallel to each other before joining at Allahabad, Rivers of lesser Himalayas and rivers originating in the Western Ghats and flowing into Arabian Sea are the example of Parallel drainage.
• Statement 3 is correct Rivers like Narmada, Son and Mahanadi originating from Amarkantak Hills flow in different directions and are good examples of radial pattern( centrifugal pattern).

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