Long-term storage
Long- term storage is a term used in dam technology to classify the size of the total storage space of a dam . In the case of a multi-year storage tank, the volume of the total storage space is greater than the volume of water that flows into the reservoir from the catchment area on average over the year . Such a dam takes more than a year - sometimes even several years - to be completely filled if no water is released in the meantime.
The term is defined by the degree of expansion as ß = total storage space divided by the annual amount. An annual memory has the degree of expansion ß = 1, all values above 1 represent a multi-year memory. Correspondingly, annual storage tanks have a degree of expansion below 1. Sometimes the degree of expansion is also given in percent , with 100% corresponding to ß = 1.
Examples:
literature
- Jürgen Giesecke, Emil Mosonyi: Hydropower plants planning, construction and operation . 5th edition. Springer, Heidelberg 2009, ISBN 978-3-540-88988-5 .