Young Black Haired Girl Strips Her Black Dress On The Roof With A Rainwater Tank

One of the greatest revolutions in the ability of harvesting rain water has been the invention of modular, scalable systems which are installable underground. These came as an evolution of a geosynthetic applications called drainage cells, which when stacked provide a void space volume which allows for the storing of water. Improved and more cost effective industrial design now allow for theoretically limitless storage of water underground. Examples of these modular structures are Atlantis Matrix Tanks used in the Manly Stormwater Treatment and Re-use project of Manly Council in Australia.
Water supply augmentation
In some cities, installation of rainwater tanks may be mandatory, or may help a new building be approved. For example, in Victoria, Australia new houses which have rainwater tank connected to all flush toilets are given an additional 1-star of the required 5-star House Energy Rating. Some governments subsidise purchases of rainwater tanks or provide rebates in areas where they are considered an important means of water supply augmentation.