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Page Title:
Table 1. Sieve results for native ebb shoal samples |
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 ERDC TN-DOER-N6
March 2000
placed in the study area, five samples of the placed material were collected on 2 December 1998.
The characteristics of the native ebb-shoal sediments and the placed dredged material were
compared.
Grain-size analysis was accomplished using two techniques. The sediment samples containing
clean, sand-sized material were analyzed by standard sieve techniques. Because some of the
samples contained fine material, they were also analyzed with a Coulter LS1000 laser particle
counter for grain-size distribution. The laser particle counter measured grain sizes from coarse sand
to clay. Each sample was measured three times. The two methods of analysis (standard sieve and
the laser particle counter) are not directly comparable because the sieve method measures weight-
percent based on size that passes a given sieve, while the laser particle counter measures a percent
volume of a particle size. Comparing the sieve and laser data sets for the sand size samples indicated
that the laser particle counter produced coarser means than the sieve method. The grain-size statistics
for the predisposal native sand size samples analyzed by sieve method are shown in Table 1 and all
samples (including the fines) analyzed by the laser particle counter are shown in Table 2. For
consistency, the mean grain sizes derived by laser particle counter will be used in the analysis since
they are available for all samples and are comparable with one another.
Table 1
Sieve results for native ebb shoal samples
SAMPLE #
EASTING
NORTHING MEAN-phi SORTING-phi SKEWNESS-phi KERTOSIS-phi MEAN-mm Depth (ft - mlw)
0-3
1787524.62
60445.27
2.31
0.59
-0.93
6.3
0.2
-33.5
0-5
1787810.2
60677.21
2.36
0.49
-1.18
7.96
0.19
-32.1
0-7
1788092.75
60934.01
2.28
0.48
-1.44
10
0.21
-29.7
0-9
1788432.32
61220.84
2.12
0.43
-0.86
7.12
0.23
-24.6
1-3
1788337.84
60441.8
2.26
0.41
-1.09
9.85
0.21
-27
1-7
1788995.61
60847.67
2.17
0.37
-0.17
5.49
0.22
-22
1-9
1798385.27
61039.7
1.95
0.49
-0.95
7.05
0.26
-20.7
2-5
1788172.95
60226.23
2.3
0.47
-1.68
14.33
0.2
-30.9
2-6
1788342.56
60332.67
2.31
0.43
-0.92
8.31
0.2
-27.7
3-0
1787725.25
59492
2.29
0.56
-0.85
6.64
0.21
-30.5
3-3
1788458.62
60054.48
2.27
0.43
-0.88
8.16
0.21
-28.8
3-6
1788462.99
60190.84
2.25
0.43
-1.02
7.75
0.21
-27.1
3-7
1789157.55
60472.27
2.14
0.45
-1.57
10.27
0.23
-20.9
3-9
1789565.24
60687.85
2.16
0.39
-0.51
5.05
0.22
-20.8
PROBE
1788151.39
59709.59
2.11
0.53
-0.93
5.41
0.23
-30.6
4-4
1788270.85
59790.53
2.09
0.51
-0.4
4.89
0.23
-31.3
4-5
1788405.69
59896.53
2.31
0.5
-0.6
4.77
0.2
-30
4-6
1788583.04
60076.89
2.24
0.45
-1.05
7.77
0.21
-26.5
5-5
1788586.36
59791.37
2.23
0.44
-1.05
7.05
0.21
-29.2
5-6
1788715.55
59926.51
2.25
0.48
-1.72
10.5
0.21
-26.6
5-9
1789155.96
60259.51
2.13
0.43
-1.43
9.49
0.23
-23.2
6-5
1788727.53
59583.97
2.27
0.44
-1.35
11.41
0.21
-28.7
6-6
1788791.83
59695.79
2.26
0.44
-1.03
7.96
0.21
-27
6-7
1788991.67
59844.51
2.33
0.43
-1.12
9.6
0.2
-26.9
7-5
1788768.35
59424.35
2.3
0.43
-1.08
8.91
0.2
-29.8
7-6
1788935.57
59581.12
2.28
0.43
-1.24
12.12
0.21
-26.9
7-9
1789414.12
59955.15
2.18
0.41
-0.81
6.83
0.22
-21.2
9-1
1788417.93
58551.42
2.25
0.61
-0.84
4.73
0.21
-33.8
9-5
1789059.29
59144.07
2.31
0.43
-1.46
11.3
0.2
-27.3
9-9
1789640.42
59599.43
2.13
0.44
-1.04
6.98
0.23
-22
11-9
1789925.81
59369.5
2.09
0.44
-0.79
5.49
0.24
-22.4
6
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