in cooperation with
The scenario is a fuel (gasoline) truck spill. A nearby public water-supply well, indicated by the blue dot, is threatened. Management decisions need to account for uncertainty in permafrost distribution, variation in water-supply pumping, and an action response to the spill. The cross-hatched area in the figures represents permafrost and the shaded area represents a cryogenic curtain wall. The examples show how modeling can be used to better understand ground-water dynamics for engineered or natural attenuation project ojectives. Please note this simulation does not represent an actual spill in Fairbanks.
The images show simulated benzene concentration levels in micrograms per liter. The flow field is steady state and the simulations end when the water-supply well is impacted or at 10 years. The models were run on a Cray YMP and took 40-45 seconds for 60 time steps and 60-70 seconds for 120 time steps. No "manual" (code changing) optimization was applied. The Cray compiler used full automatic optimization.
 | HIGH pump rate NO permafrost click on image! |
69K,120 frames, 5 bit 32 color, 1/100 sec frame rate |
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HIGH pump rate PERMAFROST click on image! |
62K, 120 frames, 5 bit 32 color, 1/100 sec frame rate |
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LOW pump rate PERMAFROST click on image! |
63K, 120 frames, 5 bit 32 color, 1/100 sec frame rate |
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HIGH pump rate PERMAFROST cryogenic curtain WALL click on image! |
63K, 120 frames, 5 bit 32 color, 1/100 sec frame rate |
Note: The animated GIF files will play as they download. Various transmission rates and line conditions can make the animation appear jumpy during downloading. The file will play smoothly after the file is downloaded to the local computer. Click on the stop or back buttons on your browser to stop the animation.
| Larry Hinzman (ffldh@aurora.alaska.edu) Water and Environmental Research Center University of Alaska Fairbanks Fairbanks, Alaska 99775 Tel: (907) 474-7331, Fax: (907) 474-7979 |
Michael R. Lilly (fymrl@aurora.alaska.edu) Water and Environmental Research Center University of Alaska Fairbanks Fairbanks, Alaska 99775 Tel: (907) 479-8891, Fax: (907) 474-7979 |
| Sergei Maurits (maurits@arsc.edu) Arctic Regions Supercomputing Center University of Alaska Fairbanks Fairbanks, Alaska 99775 Tel: (907) 474-5591 |
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