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All figures (9)
Fig. 11. Norton sensor data during the lower low tide of April 22, 2003.
Fig. 2. 2001 Landsat image of the Fraser River delta showing the 2002 site (■=Norton) in 10 m water depth, and the 2003 locations in 8 m (■=ADCP) and 0 m (■=Norton) depths. Roberts Bank is outlined in yellow.
Fig. 4. Deployment of Norton on Roberts Bank March 23, 2003 using the Canadian Coast Guard Hovercraft Siyay. A radar reflector and flashing light were mounted on a pole above the tripod.
Fig. 3. Imagenex sonar image (left) of test ripples (about 1- 2 cm height, about 10 cm length) in tank. Red range rings are 1 m increments. Three sand ripples are shown starting at 1 m range (first red ring).
Fig. 8. High suspended sediment concentration during moderate westerly winds and near low tide (image 04051200).
Fig. 6. First image (image 03231900) from the scanning sonar after the tide had submerged the sonar head. Tripod legs and instruments show up darkest, with ripple-like features evident, particularly in the northwest quadrant. Parallel lines are used to highlight ripple features having a NE-SW orientation.
Fig. 7. Radial-pattern sonar image (image 040909).
Fig. 10. ADCP current profile data for April 22, 2003 (north component of velocity is in mm s-1). The speed direction time series for a mid-depth is shown in the lower portion, along with the pressure time series.
Fig. 9. Uncorrected OBS readings from the sensor 30 cm off bottom, showing high suspended sediment concentrations at lower low water.
Proceedings Article
•
DOI
•
A configurable multi-sensor tripod for the study of near-bottom ocean processes
[...]
R. Birch
,
P.R. Hill
,
Murray Clarke
,
David Lemon
,
David B. Fissel
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+1 more
01 Jan 2003
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