Translations:Regenwassernutzung/215/en

Economical storage volume

Simulations, varying precipitation amounts and the amount of overflow water considered prove that the storage should not be chosen as too large. The coverage ratio in the figure describes the portion of non-potable water requirement that can be covered by rainwater. For Example 3 this ratio is displayed in the graphic as dependent on the storage volume. The maximal possible targeted coverage ratio is 94 %. To achieve this value, an exceedingly large tank would be needed. In practice, a tank with 3.5 m³ would be installed that can almost cover 80 % of the non-potable water requirement with rainwater. An unnecessary enlargement of the storage volume would increase the investment costs.