Water storage evaporation control using floating modular units which self ballast

摘要

A floating modular cover for a water storage is disclosed. The cover consists of a plurality of modules in which each module includes an upper surface (35), a lower surface and a chamber defined by the upper surface and lower surfaces. Openings in the lower surface allow water into the chamber provide ballast for each module. Openings in the upper surface allow air to flow into and out of the chamber depending on the water level within the chamber. Each module has flotation means (33) to ensure that each module floats. Each module is formed from upper and lower sections (32) having complementary mating faces. Each module's upper and lower surfaces are also functionally identical so it does not matter which way up the modules are.