GROUND WATER ATLAS of the UNITED STATES
Oklahoma, Texas
HA 730-E

Edwards-Trinity aquifer system

(figures 78-116)

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Introduction (Click to view thumbnails and download figures)

• Figure 78 Map showing extent of the Edwards-Trinity aquifer system
• Figure 79 Cross section of aquifer system
• Figure 80 Correlation chart
• Figure 81 Map showing base-of-aquifer system contour
• Figure 82 Chart showing use of fresh ground-water withdrawals during 1985
• Figure 83 Map showing pumpage for irrigation from aquifer system

Edwards-Trinity aquifer (Click to view thumbnails and download figures)

• Figure 84 Map showing extent of the Edwards-Trinity aquifer
• Figure 85 Photo showing topography of aquifer

Hydrogeology

• Figure 86 Map showing geologic units that underlie the aquifer
• Figure 87 Cross section of aquifer
• Figure 88 Map showing base-of-aquifer contour
• Figure 89 Map showing potentiometric contour of aquifer

Ground-water development

Fresh ground-water withdrawals

• Figure 90 Chart showing the use of fresh ground-water withdrawals during 1985

Edwards aquifer (Click to view thumbnails and download figures)

• Figure 91 Map showing extent of aquifer

Hydrogeologic framework

• Figure 92 Photo of Edwards aquifer research project
• Figure 93 Cross section of aquifer
• Figure 94 Cross section of aquifer
• Figure 95 Cross section of aquifer
• Figure 96 Map showing thickness of the aquifer
• Figure 97 Map showing base-of-aquifer contour
• Figure 98 Map showing structure contour

Ground-water movement, recharge, and discharge

• Figure 99 Map showing potentiometric contour
• Figure 100 Map showing faults in the aquifer
• Figure 101 Map showing potentiometric contours in Medina and Uvalde counties during winter of 1973
• Figure 102 Cross section showing runoff in the aquifer system
• Figure 103 Photo of sinkhole
• Figure 104 Graph of recharge, spring discharge, and well discharge
• Figure 105 Photo of spring
• Figure 106 Map showing major springs in the aquifer

Aquifer hydraulic properties and water quality

Ground-water development

• Table 6 Table listing withdrawals from the aquifer by county

Fresh ground-water withdrawals

• Figure 107 Chart showing the use of fresh ground-water withdrawals during 1985

Potential for development

Trinity aquifer (Click to view thumbnails and download figures)

• Figure 108 Map showing extent of the aquifer
• Figure 109 Photo of rocks in the aquifer

Hydrogeology

• Figure 110 Cross section of the aquifer
• Figure 111 Cross section of the aquifer
• Figure 112 Cross section of the aquifer
• Figure 113 Map showing base-of-aquifer contour
• Figure 114 Map showing structure contour
• Figure 115 Map showing potentiometric contour
• Table 7 Table listing hydraulic properties of aquifer

Ground-water development

• Table 8 Table listing withdrawals from the Trinity aquifer during 1985 by county

Fresh ground-water withdrawals

• Figure 116 Chart showing the use of fresh ground-water withdrawals during 1985

Potential for development

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