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IB ESS HL 4.1.6 Water Body Steady State Questions

Explain how inputs and outputs can maintain a water body in steady state.

Syllabus
First assessment 2026
Course
ESS HL
Level
HL

Exam points

  • define steady state in a water body as a condition in which inputs and outputs are balanced and storage remains approximately constant
  • calculate or explain changes in stored water using rainfall inputs, extraction outputs and water-supply data
  • evaluate whether water use is sustainable by comparing storage, recharge, demand, water quality, environmental needs and management capacity

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Study 4.1.6—Water body steady state conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB ESS HL 4.1.6 Water Body Steady State Questions question 1

[Maximum number: 1]
Figure Dam storage, urban and agricultural water use, and rainfall in the Western Cape, 2014-2018

Figure Dam storage, urban and agricultural water use, and rainfall in the Western Cape, 2014-2018

Outline one reason for the variation in the volume of water stored in dams, as shown in Figure.

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