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Groundwater Resources in the Llano Uplift Crystalline Massif Llano and Mason Counties, Texas

Groundwater Resources in the Llano Uplift Crystalline Massif Llano and Mason Counties, Texas Mishal Al- Johar November 24, 2009 CE 394K GIS in Water Resources. The Llano Uplift is characterized by GEOLOGY: Igneous and metamorphic crystalline granite, gneiss, and schist

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Groundwater Resources in the Llano Uplift Crystalline Massif Llano and Mason Counties, Texas

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  1. Groundwater Resources in the Llano Uplift Crystalline Massif Llano and Mason Counties, Texas Mishal Al-JoharNovember 24, 2009 CE 394K GIS in Water Resources

  2. The Llano Uplift is characterized by GEOLOGY: Igneous and metamorphic crystalline granite, gneiss, and schist CLIMATE: Semi-arid LANDUSE: Rural ranch land SURFACE WATER: Several large, man-made reservoirs Smaller streams GROUNDWATER: Low porosity crystalline rocks Permeable zones occur in fractures Relatively low groundwater storage THE CRYSTALLINE MASSIFF IN THE LLANO UPLIFT IS NOT “OFFICIALLY” A MINOR AQUIFER DOES IT DESERVE TO BE?

  3. Maréchal, J. C., B. Dewandel, and K. Subrahmanyam (2004)

  4. Maréchal, J. C., B. Dewandel, and K. Subrahmanyam (2004)

  5. Work completed so far: Geology (outcrops and faults) Potentiometric surface Some water quality Work to be done: Fracture trends from aerial photos More water quality Better water table map Surface water and precipitation

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