The board shall have full power and authority to devise, prepare for, execute, maintain and operate any or all works or improvements necessary or desirable to complete, maintain, operate and protect the works provided for by the official plan, and to that end, may employ and secure men and equipment under the supervision of the chief engineer or other agents, or may in its discretion, let contracts for such works, either as a whole or in parts. The board may authorize the use of suitable conservancy district facilities and properties for purposes of recreation and environmental studies and research.