200 cm/sec, but, more importantly, movement of the sensor head during impact
by breaking waves. Therefore, two SIDSEP were redeployed at approximately
the same locations as sta OS1 and OS2 on 13 March and recovered on 14 March
to test these hypotheses. The velocity range was set to 500 cm/sec, and a tension
strap was added to stabilize the sensor head. Data quality checks indicate that
most of the data from the redeployment were of satisfactory quality for
verification information for modeling. Further analysis determined that a large
number of the velocity ambiguities in the first data set could be replaced with
results of linear interpolation between accepted data points without introducing
significant bias to the data set. Generally, a high percentage of good-quality
HESTT data were recovered for each deployment.
Table D1
Tripod Deployment and Retrieval Locations
Position
Station
Deployment
Time
Retrieval
3
ID
Date
UTC
Date
Elevation
1
1
2
2
Longitude
Easting
Northing
OS 1
2/6/01
N 46 55.6849
W 124 10.5397
E 722403.99184 N 602949.19666 000
+0.99
2/9/01
3/13/01
N 46 55.6849
W 124 10.5397
E 722403.99184 N 602949.19666
+4.92
3/14/01
5/6/01
N 46 55.6849
W 124 10.5397
E 722403.99148 N 602949.19666
+0.33
5/11/01
OS 2
2/6/01
N 46 55.8448
W 124 10.5378
E 722457.17047 N 603919.70895 000
+0.27
2/9/01
N 46 55.8448
W 124 10.5378
+3.94
3/13/01
E 722457.17047 N 603919.70895
3/14/01
N 46 55.8448
W 124 10.5378
-0.98
5/11/01
5/6/01
E 722457.17047 N 603919.7089
OS 3
2/6/01
N 46 56.1246
W 124 10.5789
E 722365.46084 N 605626.57237 000
+0.82
2/9/01
N 46 56.7117
W 124 10.5967
+0.66
5/11/01
5/6/01
E 722457.71219 N 609194.78814
OS 4
2/6/01
N 46 57.2974
W 124 10.6108
E 722564.97698 N 612753.79472 000
-0.96
2/9/01
N 46 57.2974
W 124 10.6108
+0.33
5/11/01
5/6/01
E 722654.97698 N 612753.79472
OS 5
5/4/01
N 46 55.6333
W 124 10.9500
E 720682.69016 N 602715.55556 1800
-19.04
5/30/01
OS 6
5/4/01
N 46 55.5667
W 124 11.2500
E 719415.89071 N 602369.51831 1800
-30.94
5/30/01
OS 7
4/4/02
N 46 55.7167
W 124 10.7667
E 605806.71654 N 737173.92930 1900
OS 8
4/4/02
N 46 55.8167
W 124 10.7667
E 604400.25224 N 738281.01147 1900
-11
5/28/02
OS 9
4/4/02
N 46 56.0167
W 124 10.8000
E 603186.33412 N 721468.78628 1900
-11
5/28/02
DP 1
3/29/02
N 46 56.2668
W 124 7.0279
E 603793.51327 N 721497.13051 1900
-7
5/2/02
DP 2
3/29/02
N 46 56.0440
W 124 06.7468
E 605014.33728 N 721415.32018 1900
-7
5/2/02
1
Format is D dd mm.mmmm, where D = N, S, E, or W; ddd = 1 to 3 digits, degrees; mm.mmmm = two digits and four decimal places,
minutes.
2
Referred to North American Datum of 1983 Washington South 4,602 (in feet).
3
In feet referred to mean lower low water (mllw).
Data collection methods and equipment
Surf and Intertidal Dynamics Sensor Platform (SIDSEP). SIDSEP were
designed to allow for deployment of the instruments on the intertidal zone of a
high-energy beach and to position the instruments above the beach surface to
minimize sediment disturbance by the frame and sensors. Each pod contains a
SonTek Hydra configured with a high-resolution pressure sensor, Acoustic
Doppler Velocimeter Ocean (ADVO) and two optical back-scatterance sensors
(sta OBS 3) (Figure D2). The combined velocity measured near the beach
D4
Appendix D
Field Data Collection
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