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1 January 2015 Terrestrial Laser Scanning of Anthropogenic Beach Berm Erosion and Overtopping
Jochen E. Schubert, Timu W. Gallien, Morteza Shakeri Majd, Brett F. Sanders
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Abstract

Schubert, J.E.; Gallien, T.W.; Majd, M.S., and Sanders, B.F., 2015. Terrestrial laser scanning of anthropogenic beach berm erosion and overtopping.

Anthropogenic berms are widely deployed to manage coastal flooding. The dynamic erosion of scraped berms exposed to waves and a rising tide in southern California was monitored with a terrestrial laser scanner (TLS) on three occasions in February and March of 2012. An improved characterization of initial berm geometry and the dynamics of berm erosion was pursued to accurately predict the onset and impact of coastal flooding associated with berm erosion and overtopping. TLS is shown to yield a digital terrain model (DTM) with a vertical accuracy of ca. 3 cm, indicating it is an excellent source of data for initializing mechanistic and/or empirical models that could be used to predict the onset and rate of wave overtopping. Minimum scan point spacings required to achieve this level of accuracy are investigated and reported. Additionally, a dimensionless water level representing the fractional submergence of the berm is identified as a good predictor of cumulative berm erosion under the test conditions.

Jochen E. Schubert, Timu W. Gallien, Morteza Shakeri Majd, and Brett F. Sanders "Terrestrial Laser Scanning of Anthropogenic Beach Berm Erosion and Overtopping," Journal of Coastal Research 31(1), 47-60, (1 January 2015). https://doi.org/10.2112/JCOASTRES-D-14-00037.1
Received: 13 February 2014; Accepted: 30 March 2014; Published: 1 January 2015
JOURNAL ARTICLE
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KEYWORDS
coastal flooding
flood prediction
Sea level rise
urban flooding
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