III-4. 2000 WEATHER DATA
75
25
200
Eagle River Flats Met Station 2000
Daily & Cumulative Precipitation
20
150
15
100
10
50
5
0
0
Figure III-4-3. Daily precipitation and cumulative precipitation
for the season from 12 May to 15 August 2000 at the ERF me-
teorological station, showing the dry spell from late May through
28 June that contributed to the excellent drying conditions in the
treated ponds.
from mid-May to mid-August 2000 with
on the record by an average incident radia-
maximum temperatures of 20C or more. This
tion above 250 W/m2, are abundant through-
out June. Finally, the warm drying conditions
compares to only thirty days during the sum-
in late May and June can be seen in the cu-
mer of 1999 and only eighteen days during
mulative evaporation data from the 1.22-m
the summer of 1998. Precipitation was mini-
evaporation pan (Fig. III-4-5). The evapora-
mal from late May through almost all of June
tion is greatest, reflected by the steepness of
(Fig. III-4-3), with a precipitation total from
the curve, from 26 May through early July.
24 May through 28 June of only 8 mm. Thir-
The daily meteorological data for the en-
teen of the days with maximum temperatures
of 20C or more also occurred in this dry spell,
tire summer season are summarized in Table
III-4-3. More detailed data that include all the
contributing to the excellent sediment drying
15-minute observations and additional mea-
conditions during this period. Rainstorms on
sured parameters are available from CRREL
29 and 30 June, totaling 19 mm, began a pe-
in an Excel spreadsheet format if needed.
riod through the rest of the summer where
showers every few days frequently remoist-
ened the drying pond sediments and reduced
the effectiveness of the remediation. The larg-
REFERENCES
est single one-day rainfall event this summer
Collins, C.M. (2000) 1999 weather data for
occurred on 28 July, with 24 mm of rain.
Eagle River Flats. In Collins, C.M. and M.J.
The warm, dry period of late May through
Hardenberg (Ed.) (2000) Remediating and
late June is also apparent in the plot of aver-
Monitoring White Phosphorus Contamina-
age incoming and reflected short-wave radia-
tion at Eagle River Flats (Operable Unit C),
tion (Fig. III-4-4). Clear, sunny days, indicated
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