Tex. Water Code § 11.302

The conservation and best utilization of the water resources of this state are a public necessity, and it is in the interest of the people of the state to require recordation with the commission of claims of water rights which are presently unrecorded, to limit the exercise of these claims to actual use, and to provide for the adjudication and administration of water rights to the end that the surface-water resources of the state may be put to their greatest beneficial use. Therefore, this subchapter is in furtherance of the public rights, duties, and functions mentioned in this section and in response to the mandate expressed in Article XVI, Section 59 of the Texas Constitution and is in the exercise of the police powers of the state in the interest of the public welfare.