A water control and improvement district organized under the provisions of Article XVI, Section 59, of the Texas Constitution, may provide for:
(1) The control, storage, preservation, and distribution of its water and floodwater and the water of its rivers and streams for irrigation, power, and all other useful purposes;
(2) The reclamation and irrigation of its arid, semiarid, and other land which needs irrigation;
(3) The reclamation, drainage, conservation, and development of its forests, water, and hydroelectric power;
(4) The navigation of its coastal and inland water;
(5) The control, abatement, and change of any shortage or harmful excess of water;
(7) The preservation and conservation of all natural resources of the state.
The purposes stated in Subsection (b) of this section may be accomplished by any practical means.