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Temporal case study of household behavioural response to Cape Town's "Day Zero" using smart meter data
M J Booysen1, M Visser2, R Burger3
1Department of Electrical and Electronic Engineering, Stellenbosch University, South Africa.
Water Research
|November 26, 2018
Summary
Cape Town consumers drastically cut water use during the "Day Zero" crisis. Public engagement with news and social media significantly influenced behavioral changes, highlighting effective demand management strategies.
Area of Science:
- Environmental Science
- Water Resource Management
- Behavioral Science
Background:
- Cape Town faced a severe water crisis, with fears of
- Consumers reduced household water usage significantly between January 2015 and January 2018.
- Understanding the drivers of this water usage reduction is crucial for future water management.
Purpose of the Study:
- To investigate the factors influencing household water consumption during the Cape Town drought.
- To analyze the impact of official announcements and public engagement on water usage.
- To provide recommendations for effective water demand management.
Main Methods:
- Analysis of smart water meter data from middle to high-income households.
- Comparison of hot water usage patterns with unaffected areas.
- Mapping cold water smart meter readings against municipal data for over 400,000 households.
- Examination of the influence of official communications and social media activity.
Main Results:
- Household water usage decreased from 540 to 280 liters per household per day.
- Level 5 water restrictions had a counterintuitive effect on consumption due to unclear messaging.
- A media storm following the Critical Water Shortages Disaster Plan release prompted significant behavioral change.
- Conflicting government communications partially undermined water-saving efforts.
Conclusions:
- Public panic and media attention were powerful drivers of water conservation.
- Clear, consistent communication is vital for successful water demand management.
- Recommendations are provided for managing future water scarcity scenarios.