The POCA Framework — Threats to Water Security

Part of Water Resource Management · Section 11 of 14

Memory AidUnit: The Challenge of Resource ManagementGCSE

This memory aid covers The POCA Framework — Threats to Water Security within Water Resource Management for GCSE Geography. Revise Water Resource Management in The Challenge of Resource Management for GCSE Geography with 15 exam-style questions and 26 flashcards. This topic shows up very often in GCSE exams, so students should be able to explain it clearly, not just recognise the term. It is section 11 of 14 in this topic. Use it for quick recall, then test yourself straight afterwards so the memory aid becomes usable in an answer.

🧠 The POCA Framework — Threats to Water Security

Use POCA to remember the four main threats to water security in any extended answer:

P — Pollution: Agricultural run-off (nitrates, phosphates, pesticides), industrial discharge, raw sewage. 2.2 billion people lack safe water partly because of contamination.
O — Over-abstraction: Withdrawing water faster than it replenishes. The Aral Sea is the most extreme example. Groundwater over-abstraction is happening in India, the US and the Middle East right now.
C — Climate change: Changing rainfall patterns, glacier retreat, more intense droughts. Cape Town's Day Zero was driven partly by three consecutive drought years linked to climate change.
A — Access/Inequality: Economic water scarcity — water exists but the infrastructure to deliver it doesn't. More people affected by this than by physical scarcity. Driven by poverty and weak governance.

And for evaluating management strategies, remember SCALE:

S — Size: How many people does it reach? A fog catcher serves a village; a dam serves millions.
C — Cost: Who can afford it? Appropriate tech is accessible to LICs; mega-dams require government finance or foreign investment.
A — Access and fairness: Who gets the benefit and who bears the cost? Three Gorges benefits distant cities while local communities were displaced.
L — Long-term sustainability: Does it damage the environment? Can it be maintained? Sand dams last decades with minimal maintenance; large dams have irreversible ecological impacts.
E — Environmental impact: What is the ecological cost? Fog catchers: near zero. Three Gorges: Yangtze dolphin extinct, delta eroding.

Practice questions for Water Resource Management

What is the difference between physical and economic water scarcity?

  • A. Physical scarcity means water is polluted; economic scarcity means water is too expensive to buy
  • B. Physical scarcity means there is genuinely insufficient water supply; economic scarcity means water exists but people cannot access it due to lack of infrastructure
  • C. Physical scarcity affects only rich countries; economic scarcity affects only poor countries
  • D. Physical scarcity is temporary; economic scarcity is permanent
1 markfoundation

Explain three reasons why global demand for water is increasing.

3 marksstandard

Quick recall flashcards

What is physical water scarcity?
When natural water supply is limited by climate or environment.
What is economic water scarcity?
When water exists but people cannot access it because of poverty, weak infrastructure or poor management.

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