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Sustainable water-supply strategies
Suggest how water supplies can be made more sustainable. Use Figures 14a and 14b and your own understanding.
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Marking points
- 1 Explains how water supplies can be made more sustainable.
- 2 Uses Figure 14a and/or Figure 14b evidence.
- 3 Adds own understanding of sustainable water supply methods.
Full-mark answer
Water supplies can be made more sustainable by reusing water. Figure 14a shows a greywater system, where water from household uses can be used again for lower-grade uses such as toilet flushing or watering gardens. This reduces the need to abstract and treat new water. Figure 14b shows a water butt, which harvests rainwater that would otherwise run off into drains. Groundwater management can also help by limiting abstraction so aquifers are not used faster than they recharge.
Why this answer loses marks
Use a water butt because it is sustainable.
Examiner report Q04/05/06.5 notes many responses described resources without explaining how the actions make supply more sustainable.