Available for download are the following FY 2005 Data Products:

1) Excel spreadsheets that contains field data (tides and wave statistics) used in analysis with the Argus images. Field data is provided in calendar years “2004_tides”, “2005_tides, and “NH_waves”

2) An excel spreadsheet that contain the list of Argus images that pass quality control (i.e., have good daily geometry solutions). Excel spreadsheets are provided for each calendar year: “2004_autoGeoms_QC” and “2005_autoGeoms_QC”
Only cameras 4, 5, 6, and 7 have geometry solutions adjusted every hour (Section 5.1.3 of this report). Cameras 1, 2, and 3 have one fixed solution each, obtained from jet ski positions on the open water on 29 July 2004. For quantitative analysis, e.g., intertidal bathymetry mapping, cameras 6 and 7 are the most critical. If they both have good solutions, panoramic and plan-view images are processed.

3) A Reference map for converting local Argus coordinates to WA South State Plane coordinates is provided in Figure 10 of the report and as an emf file (for input into MS Word documents) on the ftp site. The filename is, “RefMap_Report2.” Also shown in this map reference lines used in the analysis and presentation.

Figure 10 (of the report). Reference map for converting local Argus coordinates (m) to WA South State Plane coordinates (m, NAD83). Also shown on this map are reference lines and notations used in the analysis of shorelines, dry-beach acreage, and intertidal volumes for this report. (Left-click the image to enlarge and save.)

4) Figure 11 in the report (shown below) provides two examples of intertidal contour maps that were generated for Benson Beach. Each contour map is created from a one to two day collection of images taken at different tidal stanzas. The maps are generated every two to four weeks; the frequency of map generation is dependent on the range of tides that are available during daylight. For consistency between maps and map analysis products, we chose collection periods that allow the acquisition of a range of contours from at least 0.69m to 2.26m NAVD88. The folder on the ftp site, “IntertidalContourMaps” contains the jpeg contour maps. The filenames, e.g., “wl_2005.08.21” denotes this as a jpeg image of intertidal waterlines (wl) acquired on the date, 21 August 2005.

Figure 11 (of the report). Two examples of intertidal bathymetric contours (white lines) overlain on a low-tide Argus timex image acquired during a low-tide period of time when contour data was acquired. Each contour is identified from the mapping of shoreline location at different tidal stanzas. (Left-click the image to enlarge and save.)

5) For each Argus intertidal bathymetric survey, excel files containing intertidal bathymetric data, in both local Argus coordinates and WA South State Plane coordinates, are provided on the ftp site in the folder, “IntertidalBathymetryData” . The filenames, e.g., “NHIntertidalBathy_2005_04_23.xls” denote this bathymetry was acquired on the date, 23 March 2005. Surveys are taken every two to four weeks; the frequency of intertidal bathymetric data acquisition is dependent on the range of tides that are available during daylight. For consistency, we attempt to collect a range of contours from at least 0.69m to 2.26m NAVD88.

6) A statistical summary of the Benson Beach 2.0m NAVD88 contour locations between February and August 2005 is provided in Figure 12 of the report and shown below. An emf (for input into MS Word documents) figure is provided on the ftp site. The filename is: 2004_02_2005_08_2.0_shoreline.emf” Shoreline data and statistics are also provided in the excel spreadsheet, “2004_02_2005_08_2.0_interp_shorelines.xls”

Figure 12 (of the report). Benson Beach 2.0m NAVD88 shoreline contours and statistics for February 2004 through August 2005: a) contour locations are referenced as distance from the arbitrary baseline shown in (d); b) the average distance of the shoreline from the baseline during this time period along with the extremes (minimum and maximum); c) the standard deviation of the shoreline location.
(Left-click the image to enlarge and save.)

7) Another way to look at shoreline shape changes is provided in Figure 13 of the report (shown below). An emf (for input into MS Word documents) figure is provided on the ftp site. The filename is, “2004_02_2005_08_2.0_ac_grid.emf” Dry-beach area is also calculated and noted in each shape image in Figure 13 and provided in an Excel spreadsheet on the ftp site with filename, “2004_02_2005_08_acreage.xls”

Figure 13 (of the report). Benson Beach 2.0m NAVD88 shoreline shape for February 2004 through August 2005 in local Argus coordinates (m). Also provided in each shape image is the dry-beach acreage calculated between the arbitrary bench mark at x=200 and the 2.0m shoreline and between y=800 and 3050m. The acreage integration error, associated with the 5m digitization steps, is also provided. (Left-click the image to enlarge and save.)

8) Intertidal sand volume changes between February 2004 and August 2005 are shown in Figure 14 of the report (shown below) along with dry-beach acreage changes and the offshore wave statistics (measured by the NDBC 46029 buoy). An emf (for input into MS Word documents) figure is provided on the ftp site. The filename is, “2004_02_09_2.0_.69_2.26_vah_P.emf” Volume data also provided in excel files: “2004_02_09_T_3050_2.26Z_loess.xls”, and “2004_10_2005_08_T_3050_2.26Z_loess.xls” for download from the ftp directory, “ExcelSpreadsheets.”

Figure 14 (of the report) a) Total (T) intertidal sand volume changes between February 2004 and August 2005 along with b) dry-beach acreage changes and the c) offshore wave statistics (measured by the NDBC 46029 buoy). Sand volumes are between 0.69 and 2.26m NAVD88 and y = 800 and 3050m; acreages are as described in Figures 12 and 13 above. Shown are the change (Greek delta) and cumulative change (”Cum”). (Left-click the image to enlarge and save.)

9) The spatial and temporal variability of sand bar location between February 2004 and September 2005 is mapped using image processing techniques developed, tested, and verified over the past twenty years. Most of the early work occurred at the USACE Field Research Facility in Duck, NC (e.g., Lippmann and Holman, 1989, 1990). More recently, engineers at WL| Delft Hydraulics have applied this remote sensing method to various beaches in Europe, Asia, and Australia (e.g., Wijnberg and Terwindt, 1995; Ruessink et al, 2003). The sand bar morphology variability is most succinctly summarized in an .avi movie. This file is provided on the ftp site in the folder, “BarMaps” and is named, “2004_02_2005_09_2.0_BARS.avi” In addition, individual image files and excel files of bar location also can be found in this folder. Figure 15 of the report provides examples of submerged sand bar mapping.

Figure 15. Grey-scale and false-color maps of sub-aqueous sand bars. Both are used to map bar crest locations. Shown are the 2.0m NAVD88 contour (dashed lines) and the crest locations of the observable offshore sand bars (solid lines). This image was acquired during storm waves (Hsig >5m). (Left-click the image to enlarge and save.)

10) Local wave direction information is extracted from pixel arrays in the field of view of Cameras 1 and 5. (A full description of these arrays in provided in Report #1.) Wave diretion analysis of storm waves (Hsig >4m) using pixel array data in Camera 1 field of view [centered on Argus location (900,1000)] is provided on the ftp site in the folder, “WaveDir” as jpeg image files and Excel files of relative spectral intensity. Figure 16 provides an example wave directional image.

Figure 16. A wave directional spectrum for 30 October 2004 at 1800 GMT. The data was acquired offshore in approximate 10m depth at the north end of Benson Beach [centered on Argus coordinates (900,1000)]. Shown is pixel intensity as a proxy for relative wave height. Degrees are relative to true North. This spectrum indicates that waves out of the northwest (295 deg true North). NDBC buoy 46029 indicated a peak direction of 300 deg true North one hour earlier. (QC on these spectra is preliminary at best and therefore will require further study.)