Image:Groundwater flow times usgs cir1139.png
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A cross sectional diagram showing qualitative flow times for various pathways through a typical aquifer system, from USGS circular 1139.
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This image is a work of a United States Geological Survey employee, taken or made during the course of the person's official duties. As a work of the United States Government, the image is in the public domain. For more information, see the USGS copyright policy. See Wikipedia:Public domain and Wikipedia:Copyrights for more details. |  |
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 15:57, 5 May 2005 | 706×457 (177 KB) | KrisK (Talk | contribs) | (cross sectional diagram showing qualitative flow times for various pathways) |
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