defination

• What is alluvial material?

  Material brought by river
• What is an alluvial terrace or bar?

  Central high area of doab with mature soil
• How high is an alluvial terrace typically?

  10 to 15 meters high
• What separates an alluvial terrace from the old flood plain?

  A slope called scarp or bluff
• Where are alluvial fans found?

  Along foot of Kirthar Mountains in Sindh
• What causes hill torrents during the rainy season?

  Sudden flow of water bringing silt and sand
• How do alluvial fans form?

  Material is deposited as torrents slow down
• What shape do alluvial fans resemble?

  Chinese fan
• What is an alluvial cone?

  An alluvial fan with steep slope
• What is a basin?

  Natural or artificial depression in land
• What is a braided channel?

  A stream split into two or more channels
• What is a boulder?

  Large, detached, rounded mass of rock
• What is a catchment area?

  Total area drained by a river and tributaries
• What does doab refer to?

  Land between two adjacent rivers
• What is drainage?

  Natural runoff of water by streams
• What is a delta?

  Mouth of the river with distributaries
• What is a glacier?

  A large mass of consolidated snow
• What does gradient refer to?

  Slope
• What is a gully?

  A narrow channel formed by water
• How is a gorge defined?

  A steep-sided narrow river valley
• What is a hamun?

  A shallow salt lake in Balochistan
• What are levees?

  Naturally built river banks from silt
• What does the term meander refer to?

  Curves in a river's natural path
• What is a mangrove swamp?

  Trees grown in tidal mud in a delta
• What is an oxbow lake?

  A small lake formed by a meander's separation
• How is a plateau defined?

  A highland area at the same elevation
• What is a pass?

  A route over or through a mountain
• What is a ravine?

  A small, narrow valley with steep sides
• What does rugged mean?

  Uneven, rough, and irregular surface
• What is relief in geography?

  The degree of unevenness of landform
• What is a river bed?

  The channel where a river flows
• What is a river basin?

  All area drained by a river
• What does runoff refer to?

  Water flowing from a drained area
• What is silt?

  Fine particles larger than clay
• What is shale?

  A fine-grained sedimentary rock
• What is a swamp?

  Wet and spongy land saturated with water
• What does terrain refer to?

  An area of land's physical characteristics
• What is a tributary?

  A stream flowing into a larger river
• What is a tidal flat?

  An area uncovered at low tide
• What does undulating mean?

  A wavy form of land