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IB ESS HL 4.2.15 Hl Water Stress Causes Questions

Analyse climatic, demographic and management causes of water stress.

Syllabus
First assessment 2026
Course
ESS HL
Level
HL

Exam points

  • identify causes of increasing water stress including population growth, intensive agriculture, high-water-demand crops, over-abstraction, upstream transfers, deforestation, pollution and drought
  • explain how rising demand, reduced recharge, water diversion, contamination or changing rainfall increase stress relative to available supply
  • analyse water-stress evidence to compare interacting demographic, agricultural, climatic and management causes and their implications for water security

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Study 4.2.15 (HL)—Water stress causes conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB ESS HL 4.2.15 Hl Water Stress Causes Questions question 1

[Maximum number: 3]
Water stress for selected crops

Figure:Water stress for selected crops

Water stress is the total annual extraction of water as a proportion of the renewable supply in a given area. If the extraction represents 40 % or more of the available supply it is described as a high risk area.

Identify three factors that may lead to an increase in water stress.

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