List of Figures
Figure 1A. External view of the McLane WTS-Tr suspended sediment sampler configured within the stainless steel test frame used for field-testing observations.
Figure 1B. The McLane WTS WTS-P suspended sediment sampler showing the overall system and configuration during laboratory testing procedures.
Figure 2. Contents of the main menu of the McLane WTS-Tr showing the menu options, the instruments diagnostic data, and the external sensor readings (transmissometer voltage displays) obtained from menu option two.
Figure 3. Contents of the main menu of the McLane WTS-P showing the menu driven options and the deployment parameters used for the USGS Massachusetts Bay and New York Bight programs.
Figure 4. Laboratory test configuration of the McLane WTS-Tr Mark 5-18 used to simulate storm events. The eighteen black plastic plugs filling the filter ports on the pump head are removed prior to immersion into the test tank.
Figure 5. A view of the two types of filter holders used on the McLane Water Transfer Systems. Prior to use, the top frits are removed from both types of filter holders. The top frits were found to pre-filter particles before they reached the filter paper resulting in erroneously low determinations of suspended matter concentrations (see Appendix 2).
Figure 6. Configuration of equipment used to lower the WTS-Tr instrument into the water during a field test at the Woods Hole Oceanographic Institution (WHOI) dock facility.
Figure 7. Collection and volume measurements of water pumped through the WTS-Tr system during testing procedures at the WHOI dock facility.
Figure 8A. Scatter plot comparing suspended matter concentrations collected by the WTS-Tr instrument BOB and the Niskin bottle. The linear regression (solid line) through the six mean sample pairs (n=6) has a correlation coefficient (r²) of .98 percent. The error bars of the three replicate samples represent one standard deviation about the mean.
Figure 8B. Scatter plot comparing suspended matter concentrations collected by the WTS-Tr instrument TED and the Niskin bottle. The linear regression (solid line) through the nine mean sample pairs (n=9) has a correlation coefficient (r²) of .72 percent. The error bars derived from each of the three replicate samples represent one standard deviation about the mean.
Figure 9. The WTS-Tr sediment sampling system (pump head and controller) mounted within an ocean bottom-resting tripod typically used for Massachusetts Bay deployments. The tripod also holds additional instruments that measure: currents, temperature and salinity, pressure (waves), light transmission, and still cameras for photographing the ocean bottom. The tripod typically remains on the ocean bottom for 3 to 4 months collecting oceanographic data on tidal currents and storm generated resuspension events.
Figure 10. The “Y” tube configuration of the McLane WTS-P suspended sediment sampler. This setup allows for flushing of the system with filtered water before and after sampling so as to minimize cross contamination from previously filtered samples.
Figure 11. Scatter plot showing a least squares linear fit comparing suspended matter collected using a Niskin bottle and the McLane WTS-P system during field tests conducted at the WHOI dock facility. The linear regression (solid line) through the six mean sample pairs (n=6) has a correlation coefficient (r²) of .42 percent. The error bar derived from each of the three replicate samples represents one standard deviation about the mean.