This is an appeal from an adjudication of the water rights along the Upper Guadalupe River. The Texas Water Rights Commission, acting under the Water Adjudication Act of 1967, determined the water rights of owners of 208 separate tracts of land that border the Upper Guadalupe River. Nineteen parties excepted, and, after hearing additional evidence, the 57th District Court made final the adjudication. The judgment fully recognized the riparian right to domestic and livestock uses; it recognized no riparian rights for lands granted after July 1, 1895; it recognized the riparian right to water used for irrigation but limited the right to the extent of the actual use during any year of the statutory test period from 1963 to 1967. The court of civil appeals affirmed the judgment of the trial court. 625 S.W.2d 353. We granted the writ of error because the decision in this case conflicts in some respects with the decision of the court of appeals in the case of Schero v. Texas Dept. of Water Resources, 630 S.W.2d 516 (Tex. App.--Waco, 1982), which is also decided today. Common to both appeals are several constitutional attacks upon the validity of the Water Adjudication Act. We affirm the judgments of the courts below in this case.