Cambridge IGCSE Environmental Management practice

Paper 1 structured question: Managing water-related disease

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Managing water-related disease

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Paper 1TheoryPractical6 marks

Analyzing pollution effects and management in a specific water body.

Results Table

Water Quality Data from Lake X

The table shows measurements of pollutants and their effects in Lake X over one year.

Month	Nitrate concentration (mg/L)	Dissolved oxygen (mg/L)	Fish mortality (%)
January	2	8	5
April	10	4	20
July	15	2	40
October	5	6	10

a
Describe the relationship between nitrate concentration and dissolved oxygen in Lake X.
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[2]
b
Explain how the changes in water quality affect fish mortality in Lake X.
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[2]
c
Suggest two management strategies to reduce pollution in Lake X.
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Aim for approximately 2 distinct marking points.
[2]

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