GET THAT GRADE!
Unit 03
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Test 3

Rivers

Answers to this test can be found in the next Unit of Get That Grade!


1 The diagram below shows a storm hydrograph.
   
  Click here to enlarge
   
(a) Print out the diagram and label the following:
(i) peak flow
(1)
(ii) lag time
(1)
(iii) falling limb
(1)
     
(b) What was the rainfall
(i) in the hour when the rainfall was heaviest?
(1)
(ii) during the whole storm?
(1)
     
(c) State whether a flood would be more or less likely in this basin if each of the following happened. Explain each of your answers:
  (i) the valley sides were steeper
(3)
  (ii) the rock was more permeable
(3)
  (iii) deforestation occurred
(3)
  (iv) there was a period of heavy rainfall just before the storm shown on the hydrograph
(3)
  (v) the farmer's drains in the soil became blocked so that the fields became waterlogged
(3)



2 (a) Describe three ways in which a river can erode its bed and/or banks
(6)
  (b) Why are river basins in mountain regions often V-shaped?
(2)
  (c) The diagram below shows a waterfall and a gorge formed in an area with beds of hard and soft rock. Show how the waterfall and gorge were formed, by printing out the diagram and adding labels to it.
(4)
       
  Click here to enlarge



3 Name one natural feature which is often found on the floodplain of a river.
(a) Describe your named feature.
(3)
(b) Explain how the feature was formed. You may use one or more diagrams to help your explanation.
(6)



4 River basins must be managed carefully. Different interest groups have different views on the way that river basins should be managed.
Name a river basin that you have studied.
  (a) Describe one scheme which has been used to try and control flooding in that river basin.
(3)
  (b) Name one group of people who have objected to these attempts to control flooding and explain the reason for their objections.
(4)