It is the public policy of the state to provide for the conservation and development of the state's natural resources, including:
(1) the control, storage, preservation, and distribution of the state's storm and floodwaters and the waters of its rivers and streams for irrigation, power, and other useful purposes;
(2) the reclamation and irrigation of the state's arid, semiarid, and other land needing irrigation;
(3) the reclamation and drainage of the state's overflowed land and other land needing drainage;
(4) the conservation and development of its forest, water, and hydroelectric power;
(5) the navigation of the state's inland and coastal waters;
(6) the maintenance of a proper ecological environment of the bays and estuaries of Texas and the health of related living marine resources;
(7) the voluntary stewardship of public and private lands to benefit waters of the state; and
(8) the promotion of rainwater harvesting for potable and nonpotable purposes at public and private facilities in this state, including residential, commercial, and industrial buildings.