What Happens To The Water?


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A Geography lesson activity which is quite specific to the school where I teach in Bangkok, but could be adapted. Designed as a simple prelude to the causes of flooding. Students should have already learned key words of processes within the river / drainage basin such as infiltration and interception.

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What Happens To The Water?

  1. 1. What Happens To The Water? An inquiry to see how rainfall might behave differently when it lands on different surfaces in and around our school.Image: Some rights reserved by fox_kiyo
  2. 2. In small groups of two or threestudents, you will simulate rain bypouring water onto different surfaceson the school grounds.Your mission is to record, in detail,what happens to the water.
  3. 3. Each group will have one rain simulator. Also known as a one litre measuring jug.
  4. 4. You will also have 4 recordingsheets. Here is a part of one.
  5. 5. Why is it important torecord when it lastrained in this area?
  6. 6. For each ‘station’ you need to complete the followinginformation. Check you understand the questions now.
  7. 7. The following slides show 7possible locations for you to carryout the experiments at. Thereshould be the same number ofgroups as stations and you shouldrotate around these stations whenyour teacher tells you to all moveon at the same time. Take it turnsto do the different jobs (such aspouring, observing and recording).
  8. 8. Site 1 – SlopingConcrete Surface
  9. 9. Site 2 – Soil Coveredby Vegetation You will pour the water on top of the plants
  10. 10. Site 3 – FlatGrassy Surface
  11. 11. Site 4 – Flat SandySoil Surface withnot muchVegetation
  12. 12. Site 5 – SlopingSandy Soil Surfacewith not muchVegetation
  13. 13. Site 6 –Sloping GrassySurface
  14. 14. Site 7 – FlatConcreteSurface How Does the Water Spread Out?
  15. 15. What words might you expect to use when looking at how water behaves when it is poured on these surfaces in the pictures you have just seen?Image: Some rights reserved by Axel Rouvin
  16. 16. Infiltration Surface Run-offSurface Storage Interception Impermeable Any others?Image: Some rights reserved by Axel Rouvin
  17. 17. Before we go …It can be hot especially if it is asunny day. If you find that you arewaiting around for other groups,do move to shady spots so thatyou are not in direct sunlight.During the ‘experiments’ look verycarefully – the more detail you canrecord the better.
  18. 18. Remember – you are working aspart of a group. How might a groupwork best for everybody in thatgroup?
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