This homework covers storm hydrographs, river processes, drainage basins, and the effects of deforestation. Study Figure 6 and Figure 7 carefully before answering the questions.
Question 1(a): Storm Hydrographs #
Study Figure 6 below, which shows a storm hydrograph.
(i)
River discharge is the amount of water flowing in a river.
Tick the one formula in the table below which shows how river discharge is calculated.
| width × depth × speed of flow | |
| precipitation × volume of river | |
| speed of flow × amount of erosion | |
| groundwater flow × overland flow |
(ii)
Identify from Figure 6:
- • the maximum rainfall during 30 minutes: mm
- • the time when the river was most likely to start flooding:
(iii)
Explain why rivers sometimes continue to flood for many hours after the end of a period of heavy rain.
[3](iv)
Explain why an increase in discharge of a river will influence the amount of erosion and transportation taking place.
[4]Question 1(b): Drainage Basins and Deforestation #
Study Figure 7, which shows information about drainage basins in Oregon, USA (an MEDC).
(i)
What is meant by the following terms:
- drainage basin:
- watershed:
- tributary:
(ii)
Describe the problems for people and the natural environment in Oregon which may be caused by increased deforestation.
[5]Question 1(c): Opportunities of Living Near Rivers #
Describe the opportunities of living near a named river you have studied.
Name of river:
[8]Instructions for Students #
- Read all questions carefully before starting
- Look at the figures and diagrams closely
- Use geographical terms in your answers
- Give examples where asked
- Check your spelling and grammar
- Make sure you answer all parts of each question
