Landform formation by erosion
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Landform Formation by Erosion. Water Cycle = Hydrological Cycle. A series of events where water is stored and/or transferred. Water Storage. Water is stored in lakes, rivers, clouds, snow, and glaciers. Methods of Transfer.

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Water cycle hydrological cycle
Water Cycle = Hydrological Cycle

  • A series of events where water is stored and/or transferred.

Water storage
Water Storage

  • Water is stored in lakes, rivers, clouds, snow, and glaciers.

Methods of transfer
Methods of Transfer

  • Precipitation (rain), rain runoff, condensation, sublimation, evaporation, transpiration, and snowmelt.


  • Weathering is the slow breakdown of rock through chemical, biological and physical processes


  • The breakdown of rock by wind, gravity, water, and ice


  • AKA – Aeolian or alluvial Erosion

  • Causes sand dunes and alluvial fans


  • Mass movement of sediment.

  • Ex. Landslides, mudslides, avalanches

Water erosion
Water Erosion

  • Splash Erosion – caused by raindrops

  • Sheet Erosion – caused by flat sheets of rain pouring off

  • Rill Erosion – caused by small narrow areas where rain gathers and drains.

  • Gully Erosion – water then erodes away larger gullies.

Lateral erosion
Lateral Erosion

  • Erodes the sediments on the sides of streams.

  • Meanders are the S shaped bends in a river formed when a river flows over a flat plain.

  • Rivers deposit sediment on the inside of curves and erode banks on the outside.

Vertical Erosion

  • The downward cutting into bedrock by a stream forming valleys (hilly) and gorges (mountainous).

Oxbow lakes
Oxbow Lakes

  • Sickle shaped lakes that form from meanders.

  • A meander is cutoff from the river leaving an oxbow lake.

River delta
River Delta

  • River deltas are formed by constant deposition of sediment being deposited in the ocean or large lakes in a fan shape.

Shoreline erosion
Shoreline Erosion

  • Caused by the pounding of surf and tidal movements.

  • Creates crescent shaped beaches.

Human effects
Human Effects

  • Any process that removes vegetation (ranching and some construction) increases erosion.

  • Topsoil removal for farming also increases erosion.

Erosion in alaska
Erosion in Alaska

  • Matanuska River

  • Revegitation and Erosion Control

  • Shishmaref Village (video)