Geography HS P2ms

Geography HS P2ms - INTERNATIONAL BACCALAURAT BACHILLERATO...

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MARKSCHEME May 2004 GEOGRAPHY Higher Level and Standard Level Paper 2 27 pages M04/320/HS(2)M+ INTERNATIONAL BACCALAUREATE BACCALAURÉAT INTERNATIONAL BACHILLERATO INTERNACIONAL c
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This markscheme is confidential and for the exclusive use of examiners in this examination session. It is the property of the International Baccalaureate and must not be reproduced or distributed to any other person without the authorization of IBCA. – 2 – M04/320/HS(2)M+
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SECTION A A1. Drainage basins and their management Either (a) Essay [20 marks] Discuss how changes in base level of a large meandering river affect the physical and human landscape. The effects of a change in base level on the physical landscape will depend on whether the change is a lowering of base level (leading to rejuvenation and the formation of incised meanders, knickpoints and terraces) or a raising of base level which would result in the flooding of the lower part of the river valley, possibly forming a ria or fjord. There are numerous implications for human activities. For instance, incised meanders may influence the location of settlements and may pose transport difficulties, while river terraces, being safe from flood risk, may be ideal locations for agriculture and/or settlement. Changes of base level might also result in navigation hazards (such as knickpoint waterfalls on rivers), communication difficulties (cost of bridging), sheltered harbour sites, increased tourist potential. The range of possible suggestions for impacts (both negative and positive) is very great and suggestions should be treated on their own merit, with appropriate credit awarded for any reasonable response. Responses that do not include discussion of both lowering and raising of base level may not be awarded more than [12 marks] . Responses that do not include discussion of both physical and human effects may not be awarded more than [12 marks] . The marks should be allocated according to the markbands. Examiners should be aware that candidates may take a different approach which if appropriate should be fully rewarded. – 3 – M04/320/HS(2)M+
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Or (b) Structured question [4 marks] (i) Describe the patterns of rainfall and run-off in Tasmania as shown on the map. In general, there is a positive correlation between the distribution pattern of rainfall and run-off. In both cases, values in the west and south are higher than values in the east and north. However, there is also an important difference since run-off in the west represents a significantly higher percentage of rainfall than it does in the east. Some quantification is essential for full [4 marks] . [6 marks] (ii) With the aid of a diagram, examine the factors responsible for determining the amount of run-off. Rainfall amount (total) is one key determinant of run-off, but many other factors are also
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Geography HS P2ms - INTERNATIONAL BACCALAURAT BACHILLERATO...

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