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SingaporeGeographyQuick questions
Coastal Environments
Quick questions on Sea-level change and coastal flooding explained: H2 Geography
7short Q&A pairs drawn directly from our worked dot-point answer. For full context and worked exam questions, read the parent dot-point page.
What is eustatic change (global, water volume)?Show answer
Eustatic change is a worldwide change in sea level caused by a change in the volume of ocean water or the capacity of ocean basins:
What is isostatic change (regional, land height)?Show answer
Isostatic change is a regional change caused by the land rising or sinking relative to the sea:
What is present sea-level rise?Show answer
Today's rise is mainly eustatic, driven by thermal expansion and the melting of glaciers and ice sheets, at a rate of several millimetres per year and accelerating. In many coastal cities this is compounded by local subsidence, giving a faster relative rise.
What is rising coastal flood risk?Show answer
Flood risk is increasing because of several interacting drivers:
What is q1?Show answer
Distinguish between a eustatic and an isostatic change in sea level. [2 marks]
What is q2?Show answer
Explain how a raised beach forms. [2 marks]
What is q3?Show answer
Explain why relative sea-level rise can exceed global sea-level rise in some coastal cities. [3 marks]
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