Mauritius Plans Ten Mini-Reservoirs to Beat Water Shortages

Mauritius is facing a serious water resilience challenge, with drought conditions pushing reservoir levels to alarming lows in recent months. In response, authorities are planning to build ten mini-reservoirs across the island to reduce dependence on large centralised water storage systems and improve the country's ability to cope with increasingly unpredictable rainfall patterns.

The initiative is part of a broader strategy to address water insecurity on the island, which relies heavily on a network of reservoirs, boreholes and rivers to meet domestic and agricultural demand. The Central Water Authority (CWA), the government body responsible for water supply and distribution, has been under significant pressure as prolonged dry spells have strained existing infrastructure.

Mauritius has seen its main reservoir, Mare-aux-Vacoas, operating at critically low levels in recent weeks, triggering rationing measures and public concern. The push for mini-reservoirs signals a shift in thinking: rather than relying solely on a handful of large storage facilities, smaller, decentralised water catchment structures could capture rainwater more efficiently across different parts of the island, particularly in areas prone to runoff during heavy rainfall events.

Mini-reservoirs are smaller water storage structures, typically built to collect and hold surface runoff from rainfall. They can serve local communities, agriculture and emergency supply needs without requiring the large-scale infrastructure of traditional dams. In an island context like Mauritius, where terrain varies considerably between the central plateau and coastal lowlands, such structures can be strategically placed to maximise catchment potential.

The plan also reflects growing concern about climate variability. Mauritius has experienced increasingly erratic weather, with intense rainfall events followed by extended dry periods. This pattern makes large reservoir management more difficult, as water gained during storms can be lost to runoff before it reaches storage points. Smaller, distributed catchment systems are designed to intercept that runoff closer to where it falls.

The CWA has also recently moved to tap private boreholes as a short-term measure to ease the current shortfall, highlighting how acute the situation has become.

What this means: For households, businesses and farmers across Mauritius, the mini-reservoir plan represents a medium to long-term investment in water security. If implemented effectively, it could reduce the frequency and severity of water rationing, ease pressure on the national grid during dry seasons, and provide localised buffers for communities that are currently last in line during supply cuts. The timeline and funding details for the ten structures have not yet been publicly confirmed.

Source: Le Defi Media