Evaluating Aquifer Storage and Recovery

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Evaluating Aquifer Storage and Recovery

• Joel Stevens
• December 2, 2003
• GIS in Water Resources

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What is ASR?

• Temporary storage of water in an aquifer
• Used in place of water tanks and reservoirs
• Water is injected during wet or surplus periods
  and pumped during dry or peak need periods

Animation and drawing courtesy of ASR Systems LLC
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Project Goals

• Original Objective Use GIS to show the change
  of the TDS concentration gradient of the injected
  bubble over time or its storage period.
• Modified Objective Use GIS to physically
  represent well locations, injection volumes, and
  differences in hydrogeologic conditions.

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Site Location North Padre Island
Corpus Christi
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Well Parameters

• r (Q/pbf)1/2
• where
• r radius
• Q discharge (-)
• b aquifer thickness
• f porosity
• Assumptions
• Fluid displacement w/o dispersion
• Aquifer is homogeneous and isotropic
• Darcian flow conditions

Well 1 Well 1 Well 1 Well 1
Aquifer Thickness 50 ft Aquifer Thickness 50 ft Aquifer Thickness 50 ft Aquifer Thickness 50 ft
Porosity 40 Porosity 40 Porosity 40 Porosity 40
Injection Rate 100 GPM Injection Rate 100 GPM Injection Rate 100 GPM Injection Rate 100 GPM
Injection Time period 10 days Injection Time period 10 days Injection Time period 10 days Injection Time period 10 days
Total Injection Volume 1.44 MG Total Injection Volume 1.44 MG Total Injection Volume 1.44 MG Total Injection Volume 1.44 MG
Day Date Injection (ft3) Radius (ft)
1 1/1/2003 19250 17.5
2 1/2/2003 19250 24.8
3 1/3/2003 19250 30.3
4 1/4/2003 19250 35.0
5 1/5/2003 19250 39.1
6 1/6/2003 19250 42.9
7 1/7/2003 19250 46.3
8 1/8/2003 19250 49.5
9 1/9/2003 19250 52.5
10 1/10/2003 19250 55.4
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Creating Injection Plumes using Buffer Wizard
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The Problem of Scale
Using USA size resolution for plumes that are
measured in tens of feet
Change grid size from 1000 to 10
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Combining Plumes in ArcCatalog
Build attribute tables from each of the wells
ten buffers or plumes.
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ArcMap Product
Tracking Analyst Animation
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Interpolating Volume in ArcScene
Animation
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Conclusions

• You can manipulate ArcGIS to graphically
  illustrate simple groundwater processes.
• ArcGIS is still not suitable for more complex
  groundwater modeling.

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• Special thanks to Gil Strassberg from the Center
  for Research in Water Resources
• Questions?