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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

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

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Expert · Level 42 · drainage,rivers,conservation
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  1. Because they can make the river private property
  2. Because they can directly work on pollution, waste and bank protection
  3. Because they can turn the river into a mountain
  4. Because they can stop rainfall
Expert · Level 42 · drainage,rivers,eutrophication
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  1. River bed turning into gold
  2. Volcanic eruption
  3. Algal growth and oxygen shortage
  4. Uplift of the Himalayas
Expert · Level 42 · drainage,rivers,riparian-vegetation
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  1. Water becomes instantly pure
  2. Sea salt disappears
  3. Oxygen becomes unlimited in the river
  4. More soil and pollutants may reach with runoff
Expert · Level 42 · drainage,rivers,value
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  1. Because a river also supports ecology, culture and life
  2. Because a river has no use
  3. Because a river only makes stones
  4. Because a river is always harmful
Expert · Level 42 · drainage,rivers,upper-course
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  1. Because deposition is highest
  2. Because the river has no water
  3. Because downward cutting is stronger on steep slopes
  4. Because the sea sends waves
Expert · Level 42 · drainage,rivers,fisheries
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  1. When clean flow continues in the river
  2. When bank vegetation is protected
  3. When natural habitats remain safe
  4. When pollution and low flow damage habitats
Expert · Level 42 · drainage, rivers, alluvial soil, river deposition, sediment transport, plains
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  1. Due to a gentle slope, the river’s velocity and sediment-carrying capacity decrease
  2. Gravity ceases in plains
  3. River water turns into stone in the plains
  4. The sea raises the plains and spreads the soil
Expert · Level 42 · drainage,rivers,flood-warning
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  1. It permanently stops the river
  2. It gives timely risk information based on water level and rainfall
  3. It turns silt into gold
  4. It changes the river source
Expert · Level 42 · drainage,rivers,river-work
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  1. Because all three show different and connected roles of a river
  2. Because erosion alone is the work of a river
  3. Because deposition never occurs in a river
  4. Because only wind performs transportation
Expert · Level 42 · drainage,rivers,floodplain-management
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  1. Water spread and groundwater recharge capacity may decrease
  2. River velocity will always become zero
  3. All floods will end permanently
  4. Silt formation in the river will become impossible
Expert · Level 41 · geography,drainage,rivers
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  1. Steep slope and high velocity in upper course
  2. Velocity decreases at the mouth and sediment deposits
  3. Snowfall increases at the source
  4. The river has no sediment
Expert · Level 41 · geography,drainage,rivers
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  1. Silt load and flood risk may increase
  2. River water will always become clean
  3. River bed will immediately deepen
  4. Sediment will completely disappear
Expert · Level 41 · geography,drainage,rivers
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  1. Velocity is higher on the outer bend and lower on the inner bend
  2. There is no water on the outer bend
  3. Slope is always higher on the inner bend
  4. Velocity is equal on both bends
Expert · Level 41 · geography,drainage,rivers
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  1. Supply of water and sediment may decrease downstream
  2. Water will always increase in the river
  3. Sea water will become fresh
  4. The river source will widen
Expert · Level 41 · geography,drainage,rivers
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  1. Because rivers also contribute to water supply soil formation transport and ecology
  2. Because rivers never flood
  3. Because rivers do not carry water
  4. Because floods have no relation with rivers
Expert · Level 41 · geography,drainage,rivers
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  1. It supports agriculture by increasing soil fertility
  2. It makes fields permanently barren
  3. It makes irrigation impossible
  4. It makes the river underground
Expert · Level 41 · geography,drainage,rivers
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  1. Regular depth and calm flow are present
  2. Shallow sections rocks and seasonal water shortage exist
  3. The river is wide and navigable
  4. The river is connected with a port
Expert · Level 41 · geography,drainage,rivers
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  1. It blocks natural water spread and increases flood risk
  2. It always makes the river dry
  3. It completely stops sediment deposition
  4. It automatically purifies river water
Expert · Level 41 · geography,drainage,rivers
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  1. Due to fertile deposits water availability and flat land
  2. Due to permanent ice and steep slope
  3. Only because of sea depth
  4. Because rocky surface exists everywhere
Expert · Level 41 · geography,drainage,rivers
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  1. Sediment may be trapped in the reservoir and reach less downstream
  2. Sediment automatically increases and reaches the sea
  3. Sediment formation in river stops
  4. Sediment changes into air