Journal
COASTAL ENGINEERING
Volume 57, Issue 11-12, Pages 1059-1065Publisher
ELSEVIER
DOI: 10.1016/j.coastaleng.2010.07.001
Keywords
Swash; LIDAR; Uprush; Backwash
Categories
Funding
- University of New South Wales, Faculty of Engineering
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The use of an industrial LIDAR instrument to measure time-varying water-surface elevations within the swash zone is investigated. The propagation of the swash lens across the beach face was measured simultaneously by a LIDAR instrument and a network of precision ultrasonic altimeters at a sandy beach. Comparison of the two datasets indicates that the time-varying swash free-surface profile obtained using a LIDAR compare favourably with point measurements obtained using ultrasonic altimeters. Significantly, the use of a continuously scanning laser beam enables a single LIDAR instrument to obtain measurements of free-surface elevation near-synchronously at several hundred points throughout the swash zone. This high spatial resolution permits small-scale flow features such as the swash-front gradient and the presence of secondary bores to be detailed, and negates the need for the deployment of a large, multi-sensor array. (C) 2010 Elsevier B.V. All rights reserved.
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