current speed and direction through the water column in 0.5-m bins. The tripods
also contained a SonTek Hydra configured with a high-resolution pressure
sensor, ADVO, and two OBS-3 sensors. Each tripod also supported two
sediment traps for capturing suspended sediment.
Table D2
Data Sampling Method
Record
Record
Sample
Samples
Recorded
Start
Interval
Duration
Recorded/
Data
Recording
(min)
(min)
(Hz)
Burst
Equip.
Data Type
Hydra
Directional
Orbital
Every
40
34.14
4
8,192
(OS 1-4)
wave burst
velocity &
40 min
pressure
burst
Hydra
OBS
Counts
Every
40
34.14
4
8,192
(OS 1-4)
suspended
40 min
sediment
concentra-
tion
Hydra
Directional
Velocity &
Every
20
17.067
4
4,096
(OS 1-4)
wave burst
pressure
20 min
Hydra
OBS
Counts
Every
20
17.067
4
4,096
(OS 1-4)
suspended
20 min
sediment
concentrati
on
Hydra
Directional
Velocity &
Every
30
17.067
4
4,096
(OS 5-6)
wave burst
pressure
30 min
Hydra
OBS
Counts
Every
30
17.067
4
4,096
(OS 5-6)
suspended
30 min
sediment
concentrati
on
ADP
Current
Velocity
Every
6
3
1,500 kHz
(OS 5-6)
velocity
6 min
profiles
ADP
Depth,
Pressure
Every
60
17.067
4
4,096
(OS 5-6)
waves
60 min
Hydra
Directional
Orbital
Every
60
17.067
4
4,096
(OS 8-9
wave burst
velocity &
60 min
DP 1-2)
pressure
burst
Hydra
OBS
Counts
Every
60
17.067
4
4,096
(OS 8-9
suspended
60 min
DP 1-2)
sediment
concentrati
on
ADP
Current
Velocity
Every
6
3
1,500 kHz
(OS 8-9)
velocity
6 min
profiles
ADP
Depth,
Pressure
Every
60
17.067
4
4,096
(OS 8-9)
waves
60 min
D6
Appendix D
Field Data Collection
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