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IB ESS HL 4.2.13 Hl Water Stress Definition Questions

Define water stress and interpret thresholds of demand relative to supply.

Syllabus
First assessment 2026
Course
ESS HL
Level
HL

Exam points

  • define water stress as demand for water approaching or exceeding available supply
  • identify crops or countries with greatest, lowest or unchanged projected water stress from data
  • interpret water-stress maps and projections to compare relative change and infer implications for agricultural or national water security

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Study 4.2.13 (HL)—Water stress definition conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB ESS HL 4.2.13 Hl Water Stress Definition Questions question 1

[Maximum number: 1]
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.

State the crop that is under the greatest water stress.

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