River 1 hydro cycle and river system
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River 1 hydro cycle and river system

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River 1 hydro cycle and river system River 1 hydro cycle and river system Presentation Transcript

  • Rivers SEC ONE TEXTBOOK PAGE 101
  • What is a river? A river is a natural watercourse, usually freshwater, flowing towards the sea. Without the hydrological cycle, rivers cannot be formed.
  • Is this a river?
  • HYDROLOGICal CYCLE
  • HYDROLOGICal CYCLE
  • HYDROLOGICALHYDROLOGICAL CYCLECYCLE SURFACE RUNOFF INFILTRATION CONDENSATION TRANSPIRATION AND EVAPORATION PRECIPITATION
  • HYDROLOGICAL CYCLE • Precipitation – water from clouds come to the Earth’s surface as rain, snow and hail • Transpiration – plants release water vapour into atmosphere
  • HYDROLOGICAL CYCLE •Surface Run-off – rain that falls on Earth’s surface flows over land • Condensation – water vapour rises, cools and changes into tiny water droplets
  • HYDROLOGICAL CYCLE • Infiltration – water that soaks into the soil subsurface • Percolation – water moves further down into the underlying soil after infiltration
  • HYDROLOGICAL CYCLE •Throughflow – infiltrated water that flows sideways in the soil subsurface • Interception – water is absorbed by trees
  • Water flows from highlands to lowlands due to the pull of gravity. River System River sourceRiver source: The place at which the river begins. Usually found in mountainous areas or highland. TributaryTributary: Streams and rivers that join the main river Rivercourse River mouthRiver mouth: The place at which a river ends into the sea
  • RIVER SYSTEM • Source – the starting point of a river • Mouth – the ending point of a river • Drainage Basin – The area drained by a river and its tributaries
  • RIVER SYSTEM •Confluence – the point at which a tributary joins the main river • Watershed – The boundary formed by the edges of the drainage basin