The dataset is based on data from individual Basin state enterprises and the state enterprise Forests of the Czech Republic. This record is based on the records of reservoirs: whose permitted volume of uplifted or accumulated water exceeds 1 million m3; whose permitted volume of uplifted or accumulated water does not exceed 1 million m3 and which are managed by the State Enterprise Forests of the Czech Republic; whose permitted volume of uplifted or accumulated water does not exceed 1 million m3 and which are managed by the State Enterprise Basin; whose dam is classified as category I to IV in terms of technical and safety supervision pursuant to § 61(5) of the Water Act