Presumably these area estimates and those for
for the lowest Landsat reservoir elevation (578.51
some of the elevations just above this are
ft) to plus or minus 4996 acre-ft for the highest
underestimated. Given that the capacity from the
Landsat elevation (665.86 ft). The error at spill-
1985 survey for 546 is 1726 acre-ft, it seems
way elevation (661 ft, an intermediate elevation)
reasonable to assume that the underestimate of
was plus 406 and minus 407 acre-ft.
capacity is not more than about 2000 acre-ft. This
error, because it is associated with the lowest
Uncertainty in area and capacity of
reservoir level, is carried through to the upper
lowest levels (#7)
levels as well.
Table D1 summarizes the estimated surface
computing the capacity has limitations in the
area error bars for the elevations of the Landsat
lower elevation ranges because the lowest
elevation in the 1993 satellite data was 578.51 ft,
passes and for spillway elevation, for each of the
48 ft above empty. For reservoir elevations of 546
sources of uncertainty described above. Sources
ft and under, the difference interpolated estimate
#6 (depth readings) and #7 (lower levels) do not
of surface area was negative, which is clearly not
have area error bars. Table D2 lists the same for
correct, so these values were manually set to zero.
storage capacity error bars.
Table D1. Painted Rock Reservoir surface area error bars.
Area error bars (acres)
Reservoir
1993 area
#1
#2
#3
#4
#4
elevation
from Landsat
Mudflats
Wind fetch
Threshold
Masking
Date
(ft above MSL)
(acres)
upper lower
upper lower upper lower upper lower upper lower
4 Dec 93
532.10
0
0
0
0
0
0
0
0
0
0
0
2 Nov 93
578.51
7,779
389
266
48
48
31
31
119
121
0
0
1 Oct 93
594.65
13,328
305
191
83
83
49
49
106
103
33
0
30 Aug 93
604.88
17,623
410
345
109
109
54
63
172
187
60
0
29 Jul 93
612.32
21,455
475
434
133
133
80
80
168
185
50
0
27 June 93
620.61
25,888
421
384
161
161
90
90
177
184
0
0
26 May 93
631.06
32,303
644
503
200
200
122
122
186
203
0
0
10 May 93
637.75
36,485
365
206
226
226
130
131
150
164
225
200
24 Apr 93
644.22
40,934
346
270
254
254
101
132
165
179
0
330
8 Apr 93
651.68
45,795
171
117
284
284
152
152
142
156
207
245
31 Mar 93
655.24
48,633
311
149
302
302
157
157
187
191
0
447
7 Mar 93
665.86
55,141
108
58
342
342
177
177
197
241
689
0
47
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