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Understanding Hydrographs: Effects of Rainfall, Forests, and Human Activities on River Discharge

This article discusses the contrasting effects of different rainfall periods on river discharge, reasons for variations in hydrograph shapes, the impact of forests on river discharge, how human activities modify the drainage basin hydrological cycle, and factors influencing river discharge. Detailing these topics can help enhance our understanding of hydrological processes and the interconnectedness of natural and human-induced factors affecting river systems.

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Understanding Hydrographs: Effects of Rainfall, Forests, and Human Activities on River Discharge

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  1. The storm hydrograph 1

  2. 2

  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) 3

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

  5. • 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. 5

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