Observations of wave run-up and groundwater seepage line motions on a reflective-to-intermediate, meso-tidal beach

Abstract: 

Swash (SW) and ground water seepage line (GWSL) motions have been recorded at an exposed, meso-tidal, reflective-to-intermediate beach, using a coastal video monitoring system, during a 15-month period. The monitoring period allowed the collection of imagery under a wide variety of wave and beach-morphological conditions and SW and GWSL velocities were extracted on a wave-by-wave basis. The continuous, double-bounded Kumaraswamy (Kw) probability distribution is proposed to parameterize the SWandGWSL height distributions and since the distribution shape of the latter was shown to be influenced by the tidal elevation, generic, tidal elevation-dependent Kw PDFs are proposed. The beach-face slope, more than any other factor tested, was found to apply certain control to the mean uprush, backwash and GWSL velocities. The results also indicate that in reflective-to-intermediate beaches, the GWSL lies between themean and 2% exceedance swash elevation; with the occurrence of swash running above a saturated beach-face being controlled by the tidal gradient and the significant wave height

Authors
Authors: 
VOUSDOUKAS Michail
Publication Year
Publication Year: 
2014
Type

Type:

Appears in Collections
Appears in Collections: 
Institute for Environment and Sustainability
Science Areas
Keywords
JRC Institutes
IES
Publisher
Publisher: 
ELSEVIER SCIENCE BV
ISSN
ISSN: 
0025-3227
Citation
Citation: 
MARINE GEOLOGY p. 52-70 vol. 350