Rivers

• Erosion


  The weathering away of rocks
• Transportation


  The movement of sediment from upstream to downstream
• Deposition


  The dropping of sediment
• Weathering


  The breaking down of rocks
• Hydraulic Action


  The force of water going into river beds and banks
• Attrition


  Sediment hitting against each other and becoming smaller and rounder
• Abrasion


  Rocks wearing away the river beds and banks, known as the sandpaper effect
• Solution (Erosion)


  The river dissolving the bed and banks
• Traction


  Large rocks rolling along the bottom of the river bed
• Saltation


  Medium rocks bouncing along the bed of a river
• Suspension


  Small rocks being carried in the river flow
• Solution


  Rocks being dissolved in the river and being moved downstream
• Deposition occurs when


  The energy decreases
• Biological weathering


  By plants and animals
• Mechanical weathering


  Changes in temperature and moisture
• Chemical Weathering


  Die to the acidic nature of rain
• 3 Fluvial processes


  Erosion, transportation, deposition
• Erosion processes


  Abrasion, attrition, hydraulic action, solution
• Transportation processes


  Solution, traction, suspension, saltation
• Watershed


  Boundary of 2 drainage baisins
• Drainage basin


  Area a river encompasses
• Flood plain


  Where a flood occurs
• Precipitation

  All water released from clouds such as rain, snow, hail, sleet and fog.
• Condensation

  When water vapour is cooled and turns into water droplets to form clouds.
• Evaporation

  When water which is heated by the sun becomes vapour and rises into the atmosphere. This may take place over land or sea.
• Evapotranspiration

  The term for the processes of both evaporation and transpiration.
• Run-off

  Water flowing across the surface. Water may be in a channel, such as a river or stream. Or it may be overland flow when it makes its way across a field or down a roadway.
• Interception

  When water collects on objects such as leaves or flat roofs.
• Throughflow

  Water flows downhill through the soil
• Percolation

  When water soaks into soil.
• Groundwater flow

  The movement of water below the water table. Water which is stored underground.
• Transpiration

  All plants lose water through their leaves. This is when water returns to the atmosphere where it evaporates.
• Infiltration

  The downward movement of water through soil into rocks.
• Water table

  Upper surface of ground
• Where does the river have more energy

  Downstream