Tex. Water Code § 15.401

The research and planning program is created to provide money for research into and planning of the proper conservation, management, and development of the state's water resources, for regional planning by political subdivisions, for facility engineering in economically distressed areas, and for flood control planning by political subdivisions. The program may also provide money for research and planning by Texas political subdivisions related to the proper conservation, management, and development of water resources of areas outside Texas if such research or planning will result in water being available for use in or for the benefit of Texas or will maintain and enhance the quality of water in Texas.