This project has researched the preferred drawdown capacity for reservoirs in the UK and provides guidance on consistent methods for assessing the adequacy of existing drawdown facilities.

The guidance is intended for reservoir inspecting engineers who are required under UK reservoir legislation to review the drawdown capacity of reservoirs. Reservoir owners may also find the guidance useful.

https://www.gov.uk/government/publications/guide-to-drawdown-capacity-for-reservoir-safety-and-emergency-planning