Figure 10. Migration of the water well profile seen in Figure 9. The central bright spot at 71-m
depth (arrow) is the water well and its width may be ascribable to a migration algorithm artifact
because the diffraction is almost a perfect hyperbola and should migrate to a point. More shallow
events in the profile are improperly migrated because of changing velocity with depth.
are marked in Figure 5. At the time of the survey,
17.4 m below the snow surface during our surveys
and the zone of sewage-contaminated 0C snow
sump 1 was believed to look as depicted in Figure
11, which is based on prior CRREL and Metcalf and
was found the year before to extend radially about
Eddy (M&E), Inc., measurements there and
21.3 m. At the extremities of the sump, the depth to
CRREL studies of similar sumps in Greenland. The
the sewage-soaked material increases about by 3
surface of the central liquid pool was measured at
m. This sump is in use and thus there is a central
liquid pool and water in the upper portion of the
contaminated snow.
Figure 11. Two-dimensional depiction of
the disposition of sewage within sump 1 at
location A in Figure 5.
11
Previous Page
