HA 730-G Piedmont and Blue Ridge aquifers

GROUND WATER ATLAS of the UNITED STATES
Alabama, Florida, Georgia, and South Carolina
HA 730-G

Piedmont and Blue Ridge aquifers

(figures 85-93)

Introduction (Click to view thumbnails and download figures)

Figure 85 Map showing the location of the Piedmont and Blue Ridge aquifers
Figure 86 Photograph showing example of water movement in crystalline rock fractures

Geology

Relation of Rock Type and Well Yield (Click to view thumbnails and download figures)

Table 1 Table showing that the yields of wells vary with metamorphic and igneous rock type in the Piedmont physiographic province
Table 2 Table showing that the yields of wells vary with metamorphic and igneous rock type in the Blue Ridge physiographic province
Figure 87 Photograph showing typical topography of the Blue Ridge physiographic province
Figure 88 Diagram showing wells completed in different rock types

Relation of Fracturing and Well Yield (Click to view thumbnails and download figures)

Table 3 Table showing that yields of wells located along lineaments or fractures are greater than those not located along such features
Figure 89 Series of diagrammatic sections showing the formation of horizontal fractures in crystalline rocks

Relation of Regolith Thickness and Well Yield (Click to view thumbnails and download figures)

Figure 90 Schematic diagram showing relative water storage capacity of the regolith and the fractured crystalline bedrock

Relation of Regolith Thickness and Topography (Click to view thumbnails and download figures)

Figure 91 Diagram showing that the thickness of the regolith can be estimated from the topographic setting of a particular location
Table 4 Table showing that yields of wells located in valleys are larger than those of similar wells located on hills

Ground-water Flow (Click to view thumbnails and download figures)

Figure 92 Diagrammatic section showing the ground-water movement in the saturated and unsaturated zones of the Piedmont and Blue Ridge aquifers

Ground-water Quality

Fresh Ground-water Withdrawals (Click to view thumbnails and download figures)

Figure 93 Pie chart showing use of fresh ground-water withdrawals during 1985

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