If a sea wall was installed in 1970, for example, we can look at the erosion rate before and after to gauge the structure s overall effectiveness. Stage two involves extensive computer numerical analysis. Ashford hopes to identify how the different mitigation techniques really affect stress distribution in the slopes. Some do nothing or even compound problems, he says, based on initial observations. In San Diego County, however, wave erosion is really a secondary factor, according to Ashford.
Agricultural plantings can actually enhance problems.
Their root systems often invade existing cracks in the weak bluffs and make the cracks even bigger. Watering the plantings on the sloped surfaces can also add to problems. In the last stage, Ashford will combine all of the data into a comprehensive guide, complete with information about relative costs. The guidebook will be available on the World Wide Web and accessible to the public. By working with the California Coastal Commission and the local municipalities, Ashford hopes to compile relevant information that will be invaluable in initiating the proactive improvement of San Diego s coastline.