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Subjects

Geography

The Himalayan Rivers

हिमालयी नदियाँ

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.

TOPIC PRACTICE

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Medium · Level 33 · yamuna,ganga tributary,yamunotri
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  1. Yamuna
  2. Kosi
  3. Gandak
  4. Ghaghara
Medium · Level 33 · lower course,deposition,sediment
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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
Medium · Level 33 · sundarban,ganga brahmaputra delta,mangrove
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  1. Ganga and Brahmaputra
  2. Narmada and Tapi
  3. Godavari and Krishna
  4. Mahi and Sabarmati
Medium · Level 33 · brahmaputra,assam valley,plains
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  1. Assam
  2. Rajasthan
  3. Tamil Nadu
  4. Goa
Medium · Level 33 · glaciers,snowmelt,perennial flow
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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
Medium · Level 33 · course change,floods,deposition
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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
Medium · Level 33 · river energy,slope,deposition
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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
Medium · Level 33 · kosi,gandak,nepal himalayas
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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
Medium · Level 33 · northern plains,sediment,himalayan rivers
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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
Medium · Level 33 · tributary network,drainage system,himalayan rivers
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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
Medium · Level 33 · river system,origin,tributaries,mouth
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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
Medium · Level 32 · alluvial plains,himalayan rivers,deposition
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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
Medium · Level 32 · catchment area,river basin,himalayan rivers
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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
Medium · Level 32 · tributaries,water collection,river system
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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
Medium · Level 32 · brahmaputra,regional names,tsangpo,jamuna
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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
Medium · Level 32 · gorge,vertical erosion,upper course
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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
Medium · Level 32 · sundarbans,mangroves,ganga brahmaputra delta
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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
Medium · Level 33 · brahmaputra,islands,deposition
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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
Medium · Level 33 · oxbow lake,meander,ganga plain
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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
Medium · Level 33 · natural levees,flood deposition,himalayan rivers
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  1. Deposition of coarse sediment along banks during floods
  2. Sudden freezing of the river bed
  3. Sea tides reaching the Himalayas
  4. Rocks turning into lava