Groundwater

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Groundwater

• David R. Maidment
• CE 394K.2
• Spring 2005

Reading Handbook of Hydrology, Chapter 6, Sec
6.1 to 6.7
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Groundwater Investigation

• Cant see groundwater so a lot more is done by
  inference and interpretation than for surface
  water
• Site investigation
• Conceptual model of geological environment and
  the flow system through it
• Field measurements (bore holes, pump tests,
  geophysics)
• Hydrogeologic simulation model (e.g. Modflow)

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Groundwater Investigation
Figure 6.1.1
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Geological Time Scale
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(No Transcript)
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Comal and San Marcos Springs are the major
outflow points for the Southern Segment of the
Edwards Aquifer
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Barton Springs Segment of Edwards Aquifer
http//www.bseacd.org/geology.html
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Geological Evolution
http//www.edwardsaquifer.net/geology.html
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Hydrogeology of Aquifer
http//www.bseacd.org/hydrogeology.html
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Karst terrain caves, sinkholes and underground
streams
http//www.bseacd.org/karst.html
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Flow in Barton Springs
http//www.bseacd.org/cc_water_levels.html
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Piezometric Head Map
Tucson, Az.
Figure 6.3.2
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Monitoring Points
Well
Stream gage
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Piezometric Head Level
Depth from the ground surface
Pressure head
Piezometric head
Elevation head
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http//www.bseacd.org/cc_water_levels.html
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Piezometric head in monitoring wells
Dowell Monitoring Well
Buda Monitoring Well
2002
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Equipotential Lines and Flow
q K dh/dx
Figure 6.3.5
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Flow Net
Figure 6.4.1