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  • The Water Cycle and River
    • The Water Cycle
      • Evaporation
        • condensation
          • Precipitation
            • interception
              • stem flow
                • surface runoff
                  • infiltration
                    • through flow
                      • soil moisture
                        • Percolation
                          • Ground Water
                            • Ground water flow
                              • main channel
                                • evapotranspiration
      • types
        • input:
          • is when water is introduced or put into the system
        • output:
          • occur in the system when water is carried through the river and back to the sea
        • store:
          • occurs when water is kept within the system and not moved
        • transfers
          • are processes with in the system when water is moved from one place to another
    • rivers:
      • areas:
        • river channel:
          • other main body of water flowing down hill
        • tributary:
          • a small river or stream
        • mouth:
          • the meeting point where the river flows into a sea or lake
        • watershed:
          • the dividing line between drainage basins
        • confluence:
          • where two rivers meet and join
        • source:
          • where drops of water join to start a river
      • mouth
        • wide, deep, fast, bed load size is small and the rocks are smooth/round
      • source
        • narrow, shallow, slow, bed load is big and the rocks are angular
      • Upper course:
        • steep gradient, low discharge, lots of erosion.
      • middle course:
        • less steep, deepens, widens, discharge is less
      • lower course:
        • gentle  gradient, high discharge, some erosion, mostly deposition
      • erosion:
        • Attrition: when rocks bang together which makes their sides rounders and smoother and breaks up the rock to get smaller pieces
        • abrasion: when rocks rubs together becoming smoother and smaller
        • hydraulic action: when air gets into cracks on the river bank and water comes in and forces the air back creating bigger cracks, eventually the bank falls over.
        • Solution: when chemicals in the water react with rocks
      • transportation
        • traction: large boulders rolling along the river bed
        • saltation: small pebbles bounced along the river bed
        • suspension: fine material carried along in the river
        • solution: minerals dissolved in the water and carried along
      • deposition: when the river load is too heavy for the river to carry and is deposited on the course as the river doesn't not have the energy to carry the load, he river drops the heaviest first


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