Whenever during periods of drought, it is deemed warranted in the judgment of a majority of the board of county commissioners of any county in this state, the commissioners may by resolution, duly adopted, declare a drought emergency to exist and shall determine where surplus water supplies exist and are available in reservoirs constructed in that county under the provisions of this act and may prescribe rules and regulations for obtaining such surplus waters. The owner of any land on which such a water supply has been or may be impounded, shall, upon being notified by the board of county commissioners, permit entry upon his or her land and access to the reservoir to all persons for the purpose of obtaining water in accordance with the rules and regulations prescribed by the board of county commissioners.