The cost difference between storage tanks and open reservoirs for desalinated water depends on size, location, materials, and design requirements. Open reservoirs generally have lower construction costs per cubic meter of storage because they require less structural material, and the land itself can form part of the storage basin. However, they need more land, ongoing maintenance to control algae, debris, and evaporation, and sometimes protective linings or partial covers, which add to long-term costs.
Storage tanks, including underground or aboveground enclosed tanks, are more expensive upfront due to materials like reinforced concrete or steel, structural supports, and specialized covers. They require less land and provide better protection against contamination, evaporation, and environmental exposure, reducing maintenance and water quality management costs over time.
