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Subjects

Geography

Role of Rivers

नदियों की भूमिका

In Class 9 Geography, this topic from the chapter “Drainage” explains how rivers shape the land through erosion, transportation and deposition. Students learn how river systems and drainage patterns influence plains, valleys, agriculture, settlements, transport and the availability of water. The topic also highlights the importance of rivers in human life, along with challenges such as pollution, floods and the need for careful conservation and management of river resources.

TOPIC PRACTICE

Quiz this set

Up to 20 questions from this page. Select your focus, then start.

20 questions

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Hard · Level 42 · drainage,rivers,river-course
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  1. Flow imbalance and flood problem
  2. Number of solar eclipses
  3. Sea fish moving to mountains
  4. Soil becoming metal
Hard · Level 42 · drainage,rivers,civilization
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  1. Reliable water, fertile soil and communication facility
  2. Only very high mountains
  3. Permanently snow-covered land
  4. Complete isolation from the sea
Hard · Level 42 · drainage,rivers,perennial
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  1. Perennial river
  2. Seasonal dry stream
  3. Flood-only stream
  4. Saline stream
Hard · Level 42 · drainage,rivers,urbanization
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  1. Due to rising population, industry and domestic demand
  2. Because the river has only glaciers
  3. Due to no use at all
  4. Because water is never polluted
Hard · Level 42 · drainage,rivers,erosive-power
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  1. When both slope and velocity are high
  2. When the river is completely still
  3. When water completely freezes
  4. When the river has no water
Hard · Level 42 · drainage,rivers,irrigation-problems
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  1. Unplanned and excessive irrigation
  2. Complete absence of river
  3. Only mountain tourism
  4. Fishing in the sea
Hard · Level 42 · drainage,rivers,ecosystem
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  1. They support aquatic life, wetlands and nutrient cycles
  2. They only build roads
  3. They completely stop clouds
  4. They destroy all vegetation
Hard · Level 42 · drainage,rivers,conservation
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  1. Heavy pollution, encroachment and unplanned dams
  2. Balanced water use and cleaning
  3. Plantation along banks
  4. Treatment of waste
Hard · Level 42 · drainage,rivers,alluvial-particles
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  1. Because heavier particles get deposited earlier
  2. Because water turns into stone
  3. Because the river moves away from the sea
  4. Because wind stops the river
Hard · Level 42 · drainage,rivers,flood-warning
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  1. Reducing loss of life and property
  2. Stopping the river forever
  3. Ending rainfall
  4. Removing the delta
Hard · Level 42 · drainage,rivers,sand-mining
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  1. Bank erosion and riverbed instability
  2. River water instantly becoming sweet
  3. Increase of snow on mountains
  4. Floods ending forever
Hard · Level 42 · drainage,rivers,reservoir
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  1. Reservoir storage capacity may decrease
  2. Reservoir depth becomes infinite
  3. Electricity demand ends
  4. River source changes
Hard · Level 42 · drainage,rivers,water-sharing
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  1. Balanced sharing among different needs and regions
  2. Giving all water to one city
  3. Always stopping irrigation
  4. Making the river private property
Hard · Level 42 · drainage,rivers,alluvium,soil fertility,floodplains,deposition
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  1. Due to regular deposition of silt carried by the river
  2. Due to complete evaporation of river water
  3. Due to an increase in salt content in the air
  4. Due to riverbed rocks flying into fields
Hard · Level 42 · drainage,rivers,encroachment
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  1. Because construction occurs in the river’s spread zone
  2. Because the current remains calm
  3. Because vegetation increases
  4. Because water treatment occurs
Hard · Level 42 · drainage,rivers,river-conservation
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  1. Waste treatment, bank protection and public awareness
  2. Directly dumping waste into the river
  3. Removing all trees from banks
  4. Increasing illegal construction on floodplains
Hard · Level 42 · drainage,rivers,estuary
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  1. When tides and sea waves carry away silt
  2. When the river completely dries up
  3. When the river is only covered with ice
  4. When wind blocks the river course
Hard · Level 42 · drainage,rivers,catchment
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  1. Increase in sediment load of the river
  2. River water always becoming salty
  3. Permanent stoppage of rainfall
  4. River flowing uphill without slope
Hard · Level 42 · drainage,rivers,wetlands
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  1. They store floodwater and support biodiversity
  2. They instantly turn the river into a desert
  3. They destroy all nutrients
  4. They permanently turn water into stone
Hard · Level 42 · drainage,rivers,settlement-planning
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  1. Considering floodplain and safe distance
  2. Building permanent houses inside the river
  3. Blocking natural drainage
  4. Removing all bank vegetation