DELILAH Time Exposure Videos and Runup Profiles

The time exposure video images are the result of averageing 10 minutes of video images at a rate of 1 frame per second. The camera used was a dissipation camera (camera #5 discussed in Appendix B of the full DELILAH report). It allowed for a wide field of view and provided images of bar morphology. The image files are in JPG format and are labelled by date.
Time Exposure Images
901003_TX.JPG   901004_TX.JPG   901005_TX.JPG   901006_TX.JPG
901007_TX.JPG   901008_TX.JPG   901009_TX.JPG   901010_TX.JPG
901011_TX.JPG   901012_TX.JPG   901013_TX.JPG   901014_TX.JPG
901015_TX.JPG   901016_TX.JPG   901017_TX.JPG   901018_TX.JPG
901019_TX.JPG

Runup Profiles

The cross-shore position of the runup is determined from the runup edge position in the timestack image. Image coordinates of the edge are directly related to a time series of vertical runup excursion. Runup position in the timestack is found using edge detection algorithms combined with manual refinements when edge detection fails. After the edge detection is completed, image coordinates of the runup edge are transformed to a time series of vertical runup elevations. The 6-Hz timestack was decimated and saved as a 2-Hz time series. Standard Fourier wave analysis techniques were used to compute vertical runup spectra, runup wave height (Rmo), and peak period. Total record lengths were typically 119 min and processed in 4096-point (2,048-s) segments that overlapped 50 percent. The resulting spectra were smoothed in frequency with a 7-point band average, resulting in spectra with frequency resolution of 0.0034 Hz. Runup spectra were analyzed at the FRF.

The wave runup spectra were divided into three wave frequency classifications; infragravity (0.005 to 0.04 Hz), swell (0.04 to 0.15 Hz), and sea (0.15 to 0.5 Hz). These divisions are not necessarily definitive. Infragravity waves, for example, can sometimes fall within the swell frequency range. Total significant runup wave height (Rmo) is computed from the sum of energy from all three wave bands (0.005 to 0.5 Hz).

The cross-shore range of runup was determined from each time series and is available in the following table. . The files are in GIF format and labelled according to the dates included in the figure. For example, runup profiles for 7 October through 9 October are found in file rnup0709.gif. Mean runup position, mean water level recorded at the end of the FRF pier, beach slope, the Irribaren number, and incident wave Hmo measured at the 8-m array are listed in the figure.

Runup Profiles (viewable)
RNUP0709.GIF   RNUP0911.GIF   RNUP1213.GIF   RNUP1314.GIF   RNUP1516.GIF   RNUP1617.GIF   RNUP1819.GIF  

Beach Profile Data Files
901004.10m.0986.pfl   901005.10m.0986.pfl   901006.10m.0986.pfl   901007.10m.0986.pfl
901008.10m.0986.pfl   901009.10m.0986.pfl   901010.10m.0986.pfl   901011.10m.0986.pfl
901012.10m.0986.pfl   901013.10m.0986.pfl   901014.10m.0986.pfl   901015.10m.0986.pfl
901016.10m.0986.pfl   901017.10m.0986.pfl   901018.10m.0986.pfl   901019.10m.0986.pfl

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