HA 730-J Regional summary

GROUND WATER ATLAS of the UNITED STATES
Iowa, Michigan, Minnesota, Wisconsin
HA 730-J

Regional summary

(figures 1-25)

Introduction (Click to view thumbnails and download figures)

Figure 1 Photograph showing lake formed by glaciation
Figure 2 Map showing population areas
Figure 3 Map showing average annual precipitation
Figure 4 Map showing average annual runoff

Location and Extent of Major Aquifer Systems and Aquifers (Click to view thumbnails and download figures)

Figure 5 Map showing advances of glaciation
Figure 6 Map showing glacial meltwater deposits
Figure 7 Map showing aquifers and confining unit areas in Segment 9
Figure 8 Correlation chart showing aquifers and confining units listed by state and grouped into hydrogeologic units

Importance of Major Aquifer Systems and Aquifers

Geology (Click to view thumbnails and download figures)

Figure 9 Map showing crystalline-rock surface structural contour lines
Figure 10 Map showing the extent of the major bedrock units in Segment 9
Figure 11 Section showing bedrock units across Iowa from the Forest City Basin toward the Wisconsin Dome
Figure 12 Section showing bedrock units in the Hollandale Embayment
Figure 13 Generalized section showing bedrock units in the Michigan Basin

Vertical Sequence of Aquifers (Click to view thumbnails and download figures)

Figure 14 Map showing the location of the Cretaceous and Pennsylvanian aquifers
Figure 15 Map showing the location of the Mississippian aquifer
Figure 16 Map showing the location of the Silurian-Devonian aquifer
Figure 17 Map showing the location of the upper carbonate aquifer
Figure 18 Map showing the location of the Cambrian-Ordovician aquifer system, and the Jacobsville and crystalline-rock aquifers

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

Figure 19 Graph showing relation of aquifer mineralogy to several rock types in Michigan
Figure 20 Graph showing relation of composition of dissolved solids to concentration of dissolved solids
Figure 21 Map showing the hydrochemical facies of the Cambrian-Ordovician aquifer system

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

Table 1 Table showing ground-water as a source to public and domestic water-supply systems
Figure 22 Map showing fresh ground-water withdrawals by county
Figure 23 Graph showing yearly ground-water withdrawals from the Cambrian-Ordovician aquifer system from 1880 to 1980
Figure 24 Graph showing that ground-water withdrawals increased over time
Figure 25 Diagram showing the amount of water withdrawn from each aquifer during1985

Return to HA 730-J table of contents
Return to Ground Water Atlas home page