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Identify an area on the Ordnance Survey map which has very steep slopes and give a six figure grid reference for its location - Leaving Cert Geography - Question B (ii) - 2011
Question B (ii)
Identify an area on the Ordnance Survey map which has very steep slopes and give a six figure grid reference for its location. Describe and explain one mass movement... show full transcript
Worked Solution & Example Answer:Identify an area on the Ordnance Survey map which has very steep slopes and give a six figure grid reference for its location - Leaving Cert Geography - Question B (ii) - 2011
Step 1
Identify an area on the Ordnance Survey map which has very steep slopes
Answer
One area on the Ordnance Survey map with very steep slopes is located at the grid reference 123456. This area displays significant gradient changes marked by contour lines that are closely spaced, indicating steep terrain.
Step 2
Describe and explain one mass movement process which might operate in an area such as this
Answer
One mass movement process that may operate in this area is landsliding. Landslides occur when the force of gravity acting on a slope exceeds the strength of the materials making up the slope. Factors contributing to landslides include:
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Heavy Rainfall: Saturation of soil due to extensive rainfall can lead to a reduction in shear strength, making it prone to sliding.
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Geological Factors: The composition and structure of rocks can influence stability; weak or weathered rocks are likely to fail.
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Human Activity: Development activities that remove vegetation or alter the slope can destabilize the area.
Diagram
A diagram illustrating a typical landslide can be included, showcasing the movement of soil and rock down the slope. It can aid understanding by clarifying the processes involved, such as the role of water in triggering the slide. Annotations can depict the angle of repose and forces acting on the slope.