Learn from Singapore: Key Take Away from the Island-Nation’s Water turnaround Story
Context:
- Depleting water resources and the importance of water management.
Need of Water Management:
- Indian cities have witnessed unprecedented growth over the past few decades that, in turn, have had a drastic impact on water availability.
- Depleting water resources, changing climate and unsustainable water cycle management are exacerbating the water situation
- Many Indian cities have witnessed water exigencies in the form of severe drought and flood.
- Around 600 million Indians face high to extreme water stress.
- By 2030, India’s demand for water might be double the Available Supply.
Valuable Lessons from Singapore’s Water Management:
- Singapore harnessed rainwater at the catchment scale, collected through a drainage network and stored in reservoirs before being treated and supplied
- In Singapore, recycled water is treated using advanced Treatment Technologies(combination of micro and ultra-filtration followed by reverse osmosis and UV disinfection) to ensure that the recycled water complies with the highest water quality standards, and is fit for human consumption.
- Recycled water has a high demand among industries. In addition, recycled water is also blended with surface water source to augment water supply during droughts.
- Singapore utilises desalinated sea water as one of the water sources. Its strong experience in seawater desalination in bringing down per unit cost of water and developing seawater as a sustainable water source.
- Supported by strong governance, Singapore’s National Water Agency (NWA) judiciously manages the price for its water services, and proactively invests in planning for the future next drop of water.
- This is supported by strong public outreach and stakeholder engagement programmes, to bolster the value of water.
- Singapore has prioritised water demand management to reduce demand supply gap.
- Water agency mandated water-efficient taps and toilets, and championed campaigns such as the 10-L challenge—which encourages people to reduce their water use by 10 litres a day—water conservation week, public visits and engagement, and water visitor centres for people to understand and appreciate the value of water.
Way Forward:
- Indian cities need to diversify their water resources portfolio. Few Indian cities have bye-laws that mandate rainwater harvesting. This will need strong legislation and engineering interventions.
- Indian cities often fail to anticipate water-related issues and are left to react to these.
- With ageing assets, water theft and non-revenue water, our cities cannot continue to dole out water subsidies, which eventually lead to paucity of funds that could have helped upgrade the water infrastructure.
- The availability of smart metres, water-efficient devices and infrastructure monitoring devices to plug any leakages will be useful to sustain operations and maintenance.