River Topic: Factors affecting flooding and the shape of the storm hydrograph
First……Water Cycle Recap
1. Label numbers 1-5 (easy!)
2. Label  missing  key words 1-5  FIVE TWO THREE FOUR ONE
The Drainage Basin System  … .what you should know!!
Precipitation
Precipitation Interception
Precipitation Interception Leaf drip etc.
Precipitation Interception Leaf drip etc. Surface Storage
Precipitation Interception Leaf drip etc. Surface Storage Infiltration
Precipitation Interception Leaf drip etc. Surface Storage Infiltration Soil Storage
Precipitation Interception Leaf drip etc. Surface Storage Infiltration Soil Storage Percolation
Precipitation Interception Leaf drip etc. Surface Storage Infiltration Soil Storage Percolation Groundwater
Precipitation Interception Leaf drip etc. Surface Storage Infiltration Soil Storage Percolation Groundwater Deep Basin Out...
Precipitation Interception Leaf drip etc. Surface Storage Infiltration Soil Storage Percolation Groundwater Evaporation
Precipitation Interception Leaf drip etc. Surface Storage Infiltration Soil Storage Percolation Groundwater Evaporation Tr...
Precipitation Interception Leaf drip etc. Surface Storage Infiltration Soil Storage Percolation Groundwater EvapoTranspira...
Precipitation Interception Leaf drip etc. Surface Storage Infiltration Soil Storage Percolation Groundwater EvapoTranspira...
Precipitation Interception Leaf drip etc. Surface Storage Infiltration Soil Storage Percolation Groundwater EvapoTranspira...
Precipitation Interception Leaf drip etc. Surface Storage Infiltration Soil Storage Percolation Groundwater EvapoTranspira...
Precipitation Interception Leaf drip etc. Surface Storage Infiltration Soil Storage Percolation Groundwater EvapoTranspira...
River DISCHARGE <ul><li>Discharge is the volume rate of water flow, which is transported through the river channel.  </li>...
DISCHARGE (cumecs) RAINFALL mm time LAG TIME Peak Rainfall Peak Discharge http://www.bbc.co.uk/scotland/education/int/geog...
The Flood Hydrograph –  A = floods quickly (flash flood) B = slower rate of discharge, less likely to flood WHAT FACTORS A...
So…how can we alter the  drainage basin?
Urbanisation - homes
Urbanisation - Roads
Drainage basin – shape and size
Geology Which one might be permeable? Which one would slow down the passage of water the most? Which one would be most lik...
Deforestation –  how would this affect movement of water through the system?
Vegetation What processes are shown? How does vegetation affect infiltration? How does vegetation affect the speed of pass...
URBANISATION – removing vegetation and increasing RUN OFF
Industry Can also discharge water Effect on hydrograph? Effect on water quality? Effect on sediment?
TASKS <ul><li>Create a flood hydrograph from the data for River Thaw </li></ul><ul><li>http://www.ngfl-cymru.org.uk/vtc/ng...
Extra Links <ul><li>http://www.geogonline.org.uk/as_drainage.htm </li></ul><ul><li>http://www.ngfl-cymru.org.uk/vtc/ngfl/2...
Upcoming SlideShare
Loading in...5
×

Factors affecting flooding year 11 gcse

6,681

Published on

Published in: Education, Technology, Business

Transcript of "Factors affecting flooding year 11 gcse"

  1. 1. River Topic: Factors affecting flooding and the shape of the storm hydrograph
  2. 2. First……Water Cycle Recap
  3. 3. 1. Label numbers 1-5 (easy!)
  4. 4. 2. Label missing key words 1-5 FIVE TWO THREE FOUR ONE
  5. 5. The Drainage Basin System … .what you should know!!
  6. 6. Precipitation
  7. 7. Precipitation Interception
  8. 8. Precipitation Interception Leaf drip etc.
  9. 9. Precipitation Interception Leaf drip etc. Surface Storage
  10. 10. Precipitation Interception Leaf drip etc. Surface Storage Infiltration
  11. 11. Precipitation Interception Leaf drip etc. Surface Storage Infiltration Soil Storage
  12. 12. Precipitation Interception Leaf drip etc. Surface Storage Infiltration Soil Storage Percolation
  13. 13. Precipitation Interception Leaf drip etc. Surface Storage Infiltration Soil Storage Percolation Groundwater
  14. 14. Precipitation Interception Leaf drip etc. Surface Storage Infiltration Soil Storage Percolation Groundwater Deep Basin Outflow
  15. 15. Precipitation Interception Leaf drip etc. Surface Storage Infiltration Soil Storage Percolation Groundwater Evaporation
  16. 16. Precipitation Interception Leaf drip etc. Surface Storage Infiltration Soil Storage Percolation Groundwater Evaporation Transpiration Plant Storage
  17. 17. Precipitation Interception Leaf drip etc. Surface Storage Infiltration Soil Storage Percolation Groundwater EvapoTranspiration Overland Flow
  18. 18. Precipitation Interception Leaf drip etc. Surface Storage Infiltration Soil Storage Percolation Groundwater EvapoTranspiration Overland Flow Channel Storage
  19. 19. Precipitation Interception Leaf drip etc. Surface Storage Infiltration Soil Storage Percolation Groundwater EvapoTranspiration Overland Flow Channel Storage Throughflow
  20. 20. Precipitation Interception Leaf drip etc. Surface Storage Infiltration Soil Storage Percolation Groundwater EvapoTranspiration Overland Flow Channel Storage Throughflow Groundwater Flow
  21. 21. Precipitation Interception Leaf drip etc. Surface Storage Infiltration Soil Storage Percolation Groundwater EvapoTranspiration Overland Flow Channel Storage Throughflow Groundwater Flow River Run Off
  22. 22. River DISCHARGE <ul><li>Discharge is the volume rate of water flow, which is transported through the river channel. </li></ul><ul><li>Measured in cumecs (cubic metres per second) </li></ul>
  23. 23. DISCHARGE (cumecs) RAINFALL mm time LAG TIME Peak Rainfall Peak Discharge http://www.bbc.co.uk/scotland/education/int/geog/rivers/hydrographs/index.shtml
  24. 24. The Flood Hydrograph – A = floods quickly (flash flood) B = slower rate of discharge, less likely to flood WHAT FACTORS AFFECT THE DISCHARGE LINE?
  25. 25. So…how can we alter the drainage basin?
  26. 26. Urbanisation - homes
  27. 27. Urbanisation - Roads
  28. 28. Drainage basin – shape and size
  29. 29. Geology Which one might be permeable? Which one would slow down the passage of water the most? Which one would be most likely to flood?
  30. 30. Deforestation – how would this affect movement of water through the system?
  31. 31. Vegetation What processes are shown? How does vegetation affect infiltration? How does vegetation affect the speed of passage of water through the drainage basin? How does vegetation affect the hydrograph shape? A or B?
  32. 32. URBANISATION – removing vegetation and increasing RUN OFF
  33. 33. Industry Can also discharge water Effect on hydrograph? Effect on water quality? Effect on sediment?
  34. 34. TASKS <ul><li>Create a flood hydrograph from the data for River Thaw </li></ul><ul><li>http://www.ngfl-cymru.org.uk/vtc/ngfl/2007-08/geog/hydrology/Flood%20Hydrographs/Activity%203%20-%20Flood%20Hydrograph,%20River%20Thaw.html </li></ul><ul><li>Follow the link above to see what the graph should look like </li></ul><ul><li>Explain the shape of the graph – how is rainfall linked to discharge. </li></ul>
  35. 35. Extra Links <ul><li>http://www.geogonline.org.uk/as_drainage.htm </li></ul><ul><li>http://www.ngfl-cymru.org.uk/vtc/ngfl/2007-08/geog/hydrology/front_%20pages/index_floodhydrograph.html </li></ul>

×