Analog model study of ground water in the Houston District, Texas.




Wood, L.A.; Gabrysch, R.K.; Patten, E.P.

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Data on ground-water pumpage, water levels, aquifer coefficients, and geology in the Houston district, Texas, which have been collected since 1931 were used to construct an electrical analog model of the aquifer underlying the district. Water level decline maps for the periods 1890-1946, 1890-1953, and 1890-1961 were used to check the accuracy of the model. Adjustments were made by changing scale factors and electrical components to change the values of various parameters so that the model would respond in a manner similar to the aquifer when pumped. After reasonable maps of decline for those periods were prepared from data computed by the model, two decline maps for the period 1890-1970 were based on extending the 1954-1960 pumpage rate from 1961 to 1970, which would cause 30 to 40 feet of additional drawdown in the Pasadena area between 1960 and 1970. The other map was based on a predicted increase in pumpage of 67 mgd (million gallons per day) between 1961 and 1970. The predicted increase would cause about 100 feet of additional drawdown in the western part of Houston between 1961 and 1970. Although the predicted delines of water level are not exact, the model is useful in determining the order of magnitude of future water levels, which is necessary for the proper management of the Houston districts's water resources.


103 p.


ground water; geology; analog models; models; modeling; water resources; water levels