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The Modeling of Beach Erosion and Shoreline Changes Supported by prior Research Based on Video Image Processing in Duck, North Carolina. By: Michael Jefferson Jr. William Shannon Omotileiwa Oluwatoba James Mentor: Mr. Ernst Wilson. Remote Sensing Team. Omotileiwa Oluwatoba Fifth Year Student

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slide1

The Modeling of Beach Erosion and Shoreline Changes Supported by prior Research Based on Video Image Processing in Duck, North Carolina.By: Michael Jefferson Jr. William ShannonOmotileiwa Oluwatoba JamesMentor: Mr. Ernst Wilson

remote sensing team
Remote Sensing Team

Omotileiwa Oluwatoba

Fifth Year Student

Major: Geoinformatics

Minor: Digital Cartography

William Shannon

Senior

Major: Computer Sci.

Michael Jefferson Jr.

Sophomore

Major: Computer Sci.

Minor: Math

outline
Outline
  • Abstract
  • Intro to Beach Erosion
  • Satellite Imaging vs. Video Imaging
  • Data Retrieval
  • Conclusion
  • References
  • Acknowledgements
  • Questions?
abstract
Abstract

Climate change has affected the North Carolina coastal environments and coastal hazards have already taken place in that area. Significant adverse impacts in the form of frequent storms and higher rates of beach erosion have been registered, thus, making compelling the necessity of a current understanding of the vulnerability of coastal zones. We propose to study this vulnerability in the Duck area, North Carolina (location: Lat 36 10 57” N Long 75 45 05” W) utilizing the work of the Army Corps of Engineers at Duck, North Carolina at the Field Research facility (FRF). Our interest in their work lies on the use of video imagery based techniques (researched, designed, experimented and developed by the Coastal Imaging Lab of Oregon State University) implemented for the capture and understanding of changes of near shore morphology since beaches are continuously changing from geological materials (sands, dead and/or bleached corals…etc) shifted by waves, tides, and currents moving sediments and eroding shorelines; this phenomenon carries very challenging, above all devastating outcomes on coastal communities. We are most interested in the intolerant and dramatic periods of storms and hurricanes (when sediment transport is more energetic [Stockdon and Holman,2000] and shoreline changes are more rapid) associated with extended cloud cover when satellite fails to produce images of events occurring during those times.

Due to proprietary rights to this technique developed by CIL, and other limitations, we could at this time acquire neither all the scientific details related to the techniques implemented by the Coastal Imaging Lab (CIL) of Oregon State University nor the logistics behind the installation of the outlet at the FRF tower; nonetheless, our study outcome will help demonstrate the relevance and the ability of the video imagery based techniques to collect images of coastal not only during times of rebuilding but also above all, during dramatic periods of long lasting impact of storms and hurricanes.

introduction
Introduction
  • Beach Erosion/Shoreline Changes
  • Video Imaging
  • Satellite Remote Sensing

Field Research Facility Observation Tower

Example of Orbiting Satellite

example of satellite imagery vs video imagery
Example of Satellite Imagery vs. Video Imagery

Satellite Image from Google Earth

Video Image from the FRF tower

why video images are important
Why video Images are important
  • Video imaging is based near the investigation area
  • Video images are important during inclement weather because the satellite does not have the ability to permeate the cloud cover.
investigation
Investigation
  • We decided to model the changes of beach erosion from 2002 to 2004
  • We came upon this decision because Hurricane Isabel came in 2003
  • We thought that the most substantial change would come in between these years, because hurricanes produce significant changes in beach form
latitudinal and longitudinal data
Latitudinal and Longitudinal Data
  • Data was previously recorded by the FRF Engineers
  • Data on Internet contained a lot of redundant measurements
  • We needed to extract the Latitudinal and Longitudinal coordinates
this is what the data looked like on the webpage
This is what the data looked like on the webpage

Unneeded Information

Latitude

Longitude

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After deleting approximately 4,000 pieces of information this is what we put into Google Earth to model the changes in beach erosion

Latitude

Longitude

uploading the data points
Uploading the Data points
  • The first step was to copy a .kml file program template from Google
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The second step was to add the data into the .kml program and open the program in Google Earth

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One of the methods we observed them using to collect data is a sled. This is a flat trapezoidal shaped wave data collector.

This type of shape allows it to stay stationary when collecting data, while also versatile when it is time to move it

Coastal Research Amphibious Buggy (CRAB)

The CRAB puts the sleds into position

storm surge of hurricane isabel 2003
Storm Surge of Hurricane Isabel (2003)

Animation of a fifteen foot storm surge

Hurricane Isabel had a twenty-five foot storm surge on the North Carolina coast; the beach momentarily disappears

future research
Future Research
  • Since most of the coastal third world countries do not have the economic prowess to monitor their coastline changes via the use of satellite remote sensing, it is therefore our recommendation, that the use of video imaging remote sensing which is a lot less cheaper than the launching of a space vehicle, be encouraged in order to observe and monitor such critical temporal changes.
  • Being able to obtain the height difference which is the third variable needed to calculate the volume
  • Being able to calculate the intense transport of sand volume resulting in beach erosion and shoreline change
conclusions
Conclusions
  • To conclude, we have observed how coastal video imaging, through the time exposure (Timex) system (600 pictures at a rate of one image per second for 10 minutes), can help collect, analyze and archive images.
  • Although we have not been able to establish the mass of sand movement along the beach, we have however been able to show that there was a movement of sand along the beach particularly during the Hurricane Isabel
  • Showing that the most prominent causes of beach erosion are tidal waves and storm surges.
references
References
  • http://www.frf.usace.army.mil/
  • http://images.google.com/satellites
  • http://cil-www.oce.orst.edu
  • http://www.ieee.org/web/publications/authors/transjnl/index.html
acknowledgements
Acknowledgements
  • Most of the data was provided by the Field Research Facility, Field Data Collections and Analysis Branch, US Army Corps of Engineers, Duck, North Carolina.
  • Some of the data was provided by the coastal imaging lab of the State University of Oregon
  • Special thanks to Dr. Linda B. Hayden Principle Investigator, who has afforded the opportunity to participate in the URE Summer Program 2008