III-2. TREATMENT VERIFICATION
47
Po nd 155
C Piezometer
Po nd 730
Pond 183
(C 100 m)
Po nd 146
Po nd 75
Figure III-2-8. Datalogger station photographed near peak drying conditions in June 2000.
the tubes to the mast of the tripod so that the
We again monitored subsurface water lev-
tip of each Druck was just above the sediment
els at a shallow piezometer well that we used
surface.
in 1994, 1998, and 1999 (Site 3 in M.E. Walsh
On 2024 May 2000 at each datalogger sta-
et al. 1995b). A Druck pressure transducer was
tion we planted five white phosphorus par-
positioned 1.04 m below the sediment surface.
ticles (1.8 mm diameter, 5.6 mg) that were
We also installed Drucks to monitor the depth
made in the laboratory (M.E. Walsh et al.
of any standing water in the ponds. We placed
1995b). Each white phosphorus particle was
the Drucks within piezometer tubes and taped
Previous Page
