[an error occurred while processing this directive]

DELILAH Video Data
[an error occurred while processing this directive]

Seven monochrome video cameras (Table B1) were mounted on the Field Research Facility's 42- m-tall tower (Figure B1) and aimed at the minigrid area. These cameras were used to monitor wave runup and incident wave dissipation. Runup cameras (R1, R2, and R3) used telephoto lenses for improved spatial resolution and viewed different regions of the beach. Two dissipation cameras used wider angle lenses for greater spatial coverage of the minigrid area. One dissipation camera (DS) measured wave breaking over the main cross-shore array of instruments. The other dissipation camera (HU), with a wider field of view, monitored wave dissipation over a larger region and provided images of bar morphology using time exposures. An infrared camera (IR) was used for testing nighttime measurements of runup and wave dissipation. A remotely controlled pan-tilt camera (DO) provided additional coverage for special purposes and served as a backup camera. The camera view angles are shown in Figure B2.


d = horizontal view angle in degrees

Rmax = maximum range in meters

rx= horizontal cross-shore resolution in meters

ry= horizontal longshore resolution in meters

Fundamental to the video measurements is the transformation between 2D video images and 3D world coordinates, which requires a determination of camera geometry. This was accomplished with visually identifiable ground control points (GCP's) in the cameras' field of view. The 38 GCP's established during the experiment consisted primarily of white square signs or highway safety cones painted black and placed on the beach. Coordinates of the GCP's are listed in Table B2 and shown graphically in Figures B3 and B4. Many of those GCP's were temporary, with a select number positioned on any particular day. A few instrument pipes and the north property fence posts served as permanent GCP's throughout the experiment.

All video data, with the exception of time exposures, were collected on 12 Super-VHS video cassette recorders. Each VHS tape recorded two continuous hours, with 4 or 5 runs (8 to 10 hours) collected each day. The collection schedule is listed in Table B3. Several duplicate tapes were made between 16 and 19 October, with times staggered approximately 15 minutes, to ensure data redundancy and to obtain data in the time gaps between video runs. Data runs are sequentially numbered and include the camera designation. For example, run R101 refers to the first run of camera R1. Video tapes for each run had near-synchronous start times and a common SMPTE (Society of Motion Picture and Television Engineers) time code recorded on one of the audio tracks. All DELILAH tapes are in the possession of Dr. Rob Holman and the Coastal Imaging Lab at the Oceanography Department of Oregon State University.

who can be contacted regarding obtaining copies.

Video Time Exposures

Table B4 summarizes the video tape data collected and used to compute the video time exposures. These data were recorded on a Video-8 format VCR. An example of a daily time exposure is presented below. Other daily images can be viewed by clicking as indicated.

Video Plots and Data Files

Video Beach Profiles
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

RunUP Plots

Time Exposures
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

[an error occurred while processing this directive]