1. The storm hydrograph

3. (i) Draw sketch hydrographs on Figures 1a and 1b to show the contrasting effects of each of the two rainfall periods on river discharge. (3 marks) (ii) Suggest reasons for the differences in the shapes of the hydrographs that you have drawn in 1(b)(i). (3 marks)

4. Explain likely effects of the forest on river discharge. (5 marks)

5. How might human activity modify the drainage basin hydrological cycle
How might human activity modify the drainage basin hydrological cycle? (7 marks)
Examine the factors that influence river discharge. (15 marks)
Level 3 Expect detail in the answer, two or more of factors, (other than precipitation) will be covered. There may be some support, for example the Boscastle floods of 2004.