2013年5月IB地理真题（SL+HL）下载-Paper2
Optional Theme A — Freshwater – issues and confl icts
1. The diagram shows some of the factors affecting fl ood risk in a drainage basin.
(a) Identify possible human factors A and B and possible physical factors C and D.
(b) Explain how two physical factors other than precipitation can affect the magnitude of fl oods.
(c) “River management strategies always result in unwanted impacts.”Using examples, discuss this statement.
2. (a) Describe two characteristics of natural levées.
(b) (i) Define the term wetlands.
(ii) Explain two reasons why some wetlands are protected.
(c) “Multi-purpose schemes result in more benefits than problems.” Discuss this statement, referring to both physical and human impacts.
Optional Theme B — Oceans and their coastal margins
3. If you choose to answer this question refer to the diagram on page 2 in the Resources Booklet.
The diagram shows one interpretation of an area of marine pollution (commonly referred to as an oceanic “garbage patch”) and some ocean currents in the northern hemisphere.
(a) Describe the size and location of the oceanic “garbage patch” shown.
(b) Explain why most types of ocean pollution occur along coastal margins.
(c) Compare the conflicts that arise in coastal areas from habitat restoration schemes with those that arise from aquaculture.
2013年5月IB地理真题余下省略！
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