| Wednesday Jan 23, 2013 5:30 PM - Wednesday Jan 23, 2013 8:30 PM | $30.00 - $35.00 |
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Event
ASCE Seattle Section Ports and Harbors Committee Monthly Dinner
The City of Westport has experienced substantial wave attack on the revetment at Point Chehalis in recent years. This has contributed to coastal flooding, debris, and minor structural damage at points along and adjacent to the revetment, including the parking lot, the marina, and condominiums.
Studies at Grays Harbor have shown that there has been a significant increase in wave energy in the vicinity of Point Chehalis in recent years due to a climatological shift in frequency and severity of storms and changes to the inlet throat geometry due to migration of shoals immediately offshore of Point Chehalis. Under the new bathymetry condition, storms may produce waves that exceed the original revetment design wave, potentially leading to structure damage and overtopping.
The objective of this study is to develop bounds for quantifying overtopping at Point Chehalis revetment for purposes of reducing flooding impacts to the City of Westport and to gain insight into the wave processes leading to overtopping in this high-energy region. Wave and topographic data were collected at the toe of the revetment in the vicinity of documented overtopped locations along the structure, numerical model simulations were conducted to transform waves offshore to the toe of the structure, empirical overtopping calculation methods were employed to quantify run-up, overtopping and discharge. Documented overtopping events are correlated to wave climate to develop an estimate of frequency of overtopping, and construction alternatives are presented to provide the City of Westport with decision support solutions for reducing flood inundation from waves overtopping the Point Chehalis revetment.
Information gained through this investigation will assist the City of Westport and the Coastal Communities in evaluating and coordinating with the Seattle District Corps of Engineers, the costs and benefits associated with alternatives to manage and mitigate wave run-up, overtopping, and flooding during episodes of severe wave attack on the Point Chehalis coastal revetment structure. The study includes an analysis of available survey data for the Point Chehalis revetment and nearshore areas from CCSWA and Seattle District USACE efforts, a short-term data collection that involved deployment of wave and water level sensors on the revetment, development, validation, and application of a phase-resolving two-dimensional wave transformation model, Bouss-2D, and application of engineering methods to calculate wave run-up and overtopping on the existing and alternative structures.
Speakers:
Ken Connell is a Coastal Oceanographer with Golder Associates with 12 years experience working in multi-disciplinary applied coastal projects for both public and private sectors. He joins Golder's Coastal Engineering Group based in Redmond, WA to provide technical solutions for coastal and oceanographic projects combining field studies, numerical modeling, R&D, and engineering analysis. The Redmond group is comprised of engineers and scientists who work closely with the Golder Coastal Technical Community of over thirty specialists around the world. Ken engages in projects relating to wind-wave transformation, wave loading on coastal structures, shoreline and bed erosion, morphology evolution, sediment transport studies, open channel flow, and software tool development for water and sediment resource applications. Prior to joining the Coastal Group at Golder Associates, Ken held positions as a Research Physical Scientist at the Coastal and Hydraulics Laboratory of the U.S. Army Corps of Engineers Research and Development Center (USACE-ERDC-CHL) in Vicksburg, Mississippi and a Coastal Hydrographer in Florida.
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LocationDaily Grill (View)
629 Pike Street
Seattle, WA 98101
United States
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| Kid Friendly: No |
| Dog Friendly: No |
| Non-Smoking: Yes! |
| Wheelchair Accessible: Yes! |
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