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Geography

The Himalayan Rivers

In Class 9 Geography, this topic from the chapter “Drainage” introduces the Himalayan river systems, especially the Indus, Ganga and Brahmaputra. Students learn how these rivers are fed by glaciers, snow and rainfall, making them largely perennial, and trace their courses, major tributaries and drainage patterns. The topic also explains how Himalayan rivers shape deep gorges, valleys, meanders, floodplains and deltas, while supporting farming, settlements and ecosystems. It highlights their economic importance as well as the challenges of floods, erosion and changing water conditions.

Medium · Level 6 · 25 questions

TOPIC PRACTICE

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  1. Spreading and deposition of fine sediment during floods
  2. Deposition of volcanic lava
  3. Glacier falling directly into the sea
  4. Valley formation by desert wind
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  1. Because slope, velocity and sediment-carrying capacity change
  2. Because river water flows at the same speed everywhere
  3. Because glaciers exist in all parts
  4. Because the river never moves away from the sea
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  1. Tibet has less water in a cold dry area while India receives more rainfall
  2. The river joins the sea in Tibet
  3. The river completely dries in India
  4. No tributary joins it in India
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  1. They increase water, sediment and drainage area
  2. They always stop the main river
  3. They keep the river away from the sea
  4. They make all water underground
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  1. Northern alluvial plains
  2. Deccan lava plateau
  3. Sand dunes of the Thar Desert
  4. Coral islands of Andaman
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  1. Indus river system
  2. Brahmaputra river system
  3. Ganga river system
  4. Krishna river system
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  1. Yamuna
  2. Kosi
  3. Gandak
  4. Ghaghara
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  1. Because reduced slope and velocity make the river deposit sediment
  2. Because the river suddenly climbs upward
  3. Because only icebergs are found there
  4. Because water completely evaporates there
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  1. Ganga and Brahmaputra
  2. Narmada and Tapi
  3. Godavari and Krishna
  4. Mahi and Sabarmati
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  1. Assam
  2. Rajasthan
  3. Tamil Nadu
  4. Goa
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  1. They melt in summer and supply water to rivers
  2. They completely stop rivers
  3. They make river water salty
  4. They only create sea waves
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  1. Due to sediment deposition, floods and low slope
  2. Due to sudden eruption of hard lava
  3. Due to sea tides reaching mountains
  4. Due to river water always freezing
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  1. As slope decreases, cutting power reduces and deposition increases
  2. The river always disappears when slope decreases
  3. The river does only vertical erosion in plains
  4. There is no change from mountains to plains
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  1. Toward the Nepal Himalayas
  2. Toward the southern coastal plains
  3. Toward the Rajasthan desert
  4. Toward the Malwa plateau
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  1. Because they widely deposit sediments brought from the Himalayas
  2. Because they turn the northern plains only into rock
  3. Because they do not flow in plains at all
  4. Because they flow only under the sea
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  1. The drainage system becomes extensive and the flow stronger
  2. The river system ends
  3. Water never reaches the sea
  4. All rivers remain permanently locked in lakes
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  1. Because it helps understand the full course and impact of the river system
  2. Because only the mouth tells the full story of a river
  3. Because tributaries have no importance
  4. Because the origin is always in the sea
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  1. Freezing of glaciers in upper course
  2. Long term deposition of sediments by rivers
  3. Erosion by sea waves
  4. Deposition of volcanic ash
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  1. Water and sediment supply to the main river may increase
  2. The main river always dries up
  3. The main river starts from the sea
  4. The main river has no flow
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  1. Origin of the river from sea
  2. Inland end of the river
  3. Water collection capacity of the main river
  4. Volcanic nature of the river
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  1. The river rises from a different source in every region
  2. The river has no fixed route
  3. The river does not meet the sea
  4. The same river may be known by different names in different regions
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  1. Steep slope and vertical erosion
  2. Gentle slope and slow deposition
  3. Sea tides and waves
  4. Desert wind and sand
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  1. It is the rift valley of Narmada
  2. It is a closed basin of Luni
  3. It is a famous mangrove part of the delta region
  4. It is a glacial valley of Indus
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  1. Heavy deposition of sediment by the river
  2. Complete drying of the river
  3. Entry of sea waves into the river
  4. Flow of volcanic lava
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  1. By a meander being cut off from the main channel
  2. By a glacier falling directly into the sea
  3. By a river climbing a mountain peak
  4. By deposition of sea corals

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