Read the information in Fig. 1, a cross-section through dunes behind a wide sandy beach. Volunteers have installed fencing to trap wind-blown sand and place...

Assessment: Geography 9230 | Paper 1 Mock 01 | Written Paper 1 Subject: Geography - 9230

Question 1 Report

9230-p1-coast-dune-succession-5

Read the information in Fig. 1, a cross-section through dunes behind a wide sandy beach. Volunteers have installed fencing to trap wind-blown sand and placed rope around a patch of marram grass. They will revisit the site each summer to see whether the dune system becomes more stable. The figure shows several dune zones from the beach inland.

(a) Which dune zone is closest to the strandline? [1]
(b) Outline how marram grass helps a sand dune to develop. [2]
(c) Draw two features that would make the fencing scheme less effective, and label them on a simple sketch. [2]

Answer Details

(a) Embryo dunes [1] (b) Grass slows wind so sand is deposited around it [1]; roots bind sand and reduce erosion / trap more sediment [1] (c) Any two shown or labelled: gaps or broken fence, fence laid flat, trampling path through dunes, removal of vegetation [2]

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