Translations:Regenwassernutzung/175/en

The storage has a special importance in rainwater harvesting simply due to the construction size. In tropical countries with daily precipitation a tank with only a few hundred litres covers the daily needs of a single-family house. In some areas of Spain there are cisterns today with several hundred m³ of volume in order to last through prolonged dry-periods. When precipitation events are in general uniformly distributed throughout the year (e.g. Germany) and correspond well to the needs of the users, then the useful storage volumes are much smaller than often assumed. In order to determine a useful storage volume information about the quantity and distribution of precipitation as well as the needs is required. Attention must be given to continuing climate change which is resulting in longer dry-periods and accordingly larger required storage volumes.