Figure 16 Surface Temperature. (Figure by author, 2014.)
Related Figures (35)
Figure |. Map of sites. (Figure by author, 2015.) FIGURE 3. Project area. (Figure by author, 2013.) FIGURE 4. Hjulstrom diagram. (Adapted from Herz and Garrison 1998:24.) sland (a barrier island). As a photo (Figure 5) from Milton after the hurricane of 1916 illustrates, FIGURE 5. Photograph from Milton after the 1916 hurricane. (Courtesy of the University of the area every 22-28 years. Luckily, the area is somewhat protected by land and Santa Rosa FIGURE 6. Georeferenced site plan of Swingbridge Hull (Foster 2013:70). (constructed of PVC pipe) were placed on the site and referenced to the baseline. From those, FIGURE 8. Van Dorn water sampler. (Figure by author, 2014.) water in the sampler. Finally, the tube operator retrieved the sampler via its connecting line, and was rinsed thoroughly with DI water. sensor (YSI, Incorporated 1998:18). After all measurements were taken from a sample, the anode An Oakton Waterproof pHTestr 30 Pocket pH Tester was used for measuring pH. Its FIGURE 12. Surface pH. (Figure by author, 2014.) FIGURE 17. Benthic Temperature. (Figure by author, 2014.) FIGURE 18. Students placing sediment pin at Guanacaste. (Photo by author, 2013.) 2013 to determine the amount of sedimentation and erosion at each location. Sediment Cores Small sediment cores (20 cm deep) were extracted to test for sulfide (S2-) content in the term monitoring of the pins will provide better indications of sediment transport. (although missing the two deeper samples) showed the highest concentrations of S2-. The most straightforward form of monitoring and management was visual appraisal. machinery; (c) propeller shaft; and (d) boiler. (Figure by author, 2014.) FIGURE 20. 2006 (a) Guanacaste, (b) George T. Locke, and (c) Shield’s Point #5 side-scan FIGURE 22. 2013 Swingbridge Hull side-scan sonar imagery: (a) scour; (b) sonar contact. FIGURE 23. 2006 Snapper Wreck side-scan sonar imagery. (Figure by author, 2014.) FIGURE 24. 2014 Snapper Wreck side-scan sonar imagery: (a) steering components; (b) main FIGURE 25. Salinity at Riverwalk Park in Milton. (Figure by author, 2014.) FIGURE 26. pH at Riverwalk Park in Milton. (Figure by author, 2014.) corrosion accelerates in low pH water (Ammar and Riad 1958). At Riverwalk Park, the lowest recording was about three mg/l during August 2012 (Figure 27). anoxic levels in the water was at the beginning of July, when Swingbridge Hull was at 1.27 mg/l. Temperature FIGURE 28. Water temperature at Riverwalk Park in Milton. (Figure by author, 2014.)
