O-LevelGeographyThe natural environment2217/21 · Oct/Nov 2010 · Q48 Marks

Study Fig. 4, which shows the speed of flow of a river at various depths across a meander. [Figure 4]

(a)(i)On Fig. 4, use labelled arrows to show the positions of: • a river cliff, • a point bar (slip-off slope).[2]
(a)(ii)On Fig. 4, use the letters below to show where the river is carrying out: • erosion (E), • deposition (D).[1]
(a)(iii)On Fig. 4, shade the zone where the water is flowing at more than 1.0 metres per second.[1]
(a)(iv)Complete Fig. 4 by inserting the isoline for 0.2 metres per second.[2]
(b)Suggest how the north bank will change in the future.[2]

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Mark scheme

Marking points from the official mark scheme (Oct/Nov 2010). The mark or mark type is shown in brackets.

[2] (a)(i) River cliff on vertical bank; Point bar on flat bank
[1] (a)(ii) E below river cliff, D on right upward slope; (Must both be underwater)
[1] (a)(iii) Correct shading.
[2] (a)(iv) Line passing through all 0.2 m/s points; Line correct in relation to all other points
[2] (b) Undercuts; Steepens; Overhang falls in; Bank moves back / river course moves north

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