Title

Evaluating Coastal Erosion along U.S Highway 101 near Beverly Beach, Oregon

Date

5-30-2013 10:15 AM

Location

Health and Wellness Center (HWC) Room 105

Department

Earth Science

Session Chair

Jeff Myers

Session Title

Earth Science Senior Seminar Research: Geological Hazards Impacting US 101 at Beverly Beach, Oregon, and their Mitigation

Faculty Sponsor(s)

Jeff Myers

Presentation Type

Presentation

Abstract

Beverly Beach is one of the world’s fastest eroding shorelines with 0.1-0.3 meters of cliff retreat each year, which jeopardizes Oregon’s well traveled Highway 101. High rates of coastal erosion have been attributed to increased intensity of El Niño storm patterns, the inherently weak underlying Astoria Formation, water runoff, biological impacts, and beach sand starvation. Large beach sand grain size will cause a shorter, steeper beach more susceptible to erosion exposing the cliff to battering of waves thus decreasing talus slope abundance while increasing cliff steepness and height. The causes contributing to coastal erosion at Beverly Beach will be assessed by measuring beach width, sediment grain size, cliff height, and runoff from Highway 101 and local mitigation pipes. Erosion along the coastline is inevitable; humans can only mitigate the hazard so that impacts of erosion are minimal to their lives.

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May 30th, 10:15 AM

Evaluating Coastal Erosion along U.S Highway 101 near Beverly Beach, Oregon

Health and Wellness Center (HWC) Room 105

Beverly Beach is one of the world’s fastest eroding shorelines with 0.1-0.3 meters of cliff retreat each year, which jeopardizes Oregon’s well traveled Highway 101. High rates of coastal erosion have been attributed to increased intensity of El Niño storm patterns, the inherently weak underlying Astoria Formation, water runoff, biological impacts, and beach sand starvation. Large beach sand grain size will cause a shorter, steeper beach more susceptible to erosion exposing the cliff to battering of waves thus decreasing talus slope abundance while increasing cliff steepness and height. The causes contributing to coastal erosion at Beverly Beach will be assessed by measuring beach width, sediment grain size, cliff height, and runoff from Highway 101 and local mitigation pipes. Erosion along the coastline is inevitable; humans can only mitigate the hazard so that impacts of erosion are minimal to their lives.