Said commissioner shall make a comprehensive study of all conditions, wherever located, in any way relating to: (a) The control of flood waters, the establishment of encroachment limits along waterways to provide reasonable flood discharge capacity, the flood control features of existing and future dams and reservoirs, the removal of stream obstructions caused by flood waters, the extent of damage caused by flood waters to property of the state, its political subdivisions, industry and agriculture and any necessary means or method by which such damage may be repaired or provided against in case of future floods; (b) river and harbor improvements, obstructions or encroachments in any of the navigable waters or tributaries within the state, and (c) any matters kindred thereto.