High-frequency observations of berm recovery using a continuous scanning Lidar

Matthew S. Phillips; Chris E. Blenkinsopp; Kristen D. Splinter; Mitchell D. Harley; Ian L. Turner; Ron J. Cox

High-frequency observations of berm recovery using a continuous scanning Lidar

Matthew S. Phillips, Chris E. Blenkinsopp, Kristen D. Splinter, Mitchell D. Harley, Ian L. Turner, Ron J. Cox

University of New South Wales

Research output: Contribution to conference › Paper › peer-review

4 Citations (SciVal)

Abstract

The recovery of beaches following the destructive impact of storms is of significant economic, social and environmental value to coastal communities. This study investigates the recovery of a berm following removal by a storm at Narrabeen-Collaroy Beach, Australia using the unique deployment and remote operation of a Lidar mounted on the rooftop of a beachside building. Near-continuous (5Hz) subaerial profile and swash measurements were observed throughout the entire 2.5 month post-storm recovery period. The results provide new insight into the temporal progression of post-storm berm recovery, identifying three consecutive phases of immediate post-storm deposition, intermediate gradual recovery and final rapid recovery with the welding of intertidal sandbars. Significant berm growth was observed during the final phase with rates of subaerial volume deposition three times greater than those during initial phases. Relatively milder nearshore wave conditions as well as flatter intertidal gradients were found to distinguish rapid from more gradual recovery phases. Beachface progradation and berm aggradation during recovery are captured in detail by the high temporal resolution of the fixed Lidar data, providing insight into parameters governing berm recovery on microtidal, wave-dominated sandy coastlines.

Original language	English
Pages	872-878
Number of pages	7
Publication status	Published - 23 Jun 2017
Event	Australasian Coasts and Ports 2017 Conference - Cairns, Australia Duration: 21 Jun 2017 → 23 Jun 2017

Conference

Conference	Australasian Coasts and Ports 2017 Conference
Country/Territory	Australia
City	Cairns
Period	21/06/17 → 23/06/17

Funding

This study is supported by the Australian Research Council (DP150101339) and the Coastal Processes and Responses Node of the OEH Climate Change Research Hub. Lidar swash data processing assisted by Daniel Howe, UNSW Sydney. LabVIEW software was developed by Katrina Taylor, EnvisEng. Wave and tide data were kindly provided by Manly Hydraulics Laboratory on behalf of the NSW Office of Environment and Heritage (OEH). Nearshore wave modelling and the composition of a lookup table was undertaken by Thomas Mortlock, Macquarie University. The first author is supported by an Australian Postgraduate Award.

Keywords

Accretion
Beach recovery
Berm
Lidar
Narrabeen-Collaroy

ASJC Scopus subject areas

Ocean Engineering

Cite this

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title = "High-frequency observations of berm recovery using a continuous scanning Lidar",

abstract = "The recovery of beaches following the destructive impact of storms is of significant economic, social and environmental value to coastal communities. This study investigates the recovery of a berm following removal by a storm at Narrabeen-Collaroy Beach, Australia using the unique deployment and remote operation of a Lidar mounted on the rooftop of a beachside building. Near-continuous (5Hz) subaerial profile and swash measurements were observed throughout the entire 2.5 month post-storm recovery period. The results provide new insight into the temporal progression of post-storm berm recovery, identifying three consecutive phases of immediate post-storm deposition, intermediate gradual recovery and final rapid recovery with the welding of intertidal sandbars. Significant berm growth was observed during the final phase with rates of subaerial volume deposition three times greater than those during initial phases. Relatively milder nearshore wave conditions as well as flatter intertidal gradients were found to distinguish rapid from more gradual recovery phases. Beachface progradation and berm aggradation during recovery are captured in detail by the high temporal resolution of the fixed Lidar data, providing insight into parameters governing berm recovery on microtidal, wave-dominated sandy coastlines.",

keywords = "Accretion, Beach recovery, Berm, Lidar, Narrabeen-Collaroy",

author = "Phillips, {Matthew S.} and Blenkinsopp, {Chris E.} and Splinter, {Kristen D.} and Harley, {Mitchell D.} and Turner, {Ian L.} and Cox, {Ron J.}",

year = "2017",

month = jun,

day = "23",

language = "English",

pages = "872--878",

note = "Australasian Coasts and Ports 2017 Conference ; Conference date: 21-06-2017 Through 23-06-2017",

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TY - CONF

T1 - High-frequency observations of berm recovery using a continuous scanning Lidar

AU - Phillips, Matthew S.

AU - Blenkinsopp, Chris E.

AU - Splinter, Kristen D.

AU - Harley, Mitchell D.

AU - Turner, Ian L.

AU - Cox, Ron J.

PY - 2017/6/23

Y1 - 2017/6/23

N2 - The recovery of beaches following the destructive impact of storms is of significant economic, social and environmental value to coastal communities. This study investigates the recovery of a berm following removal by a storm at Narrabeen-Collaroy Beach, Australia using the unique deployment and remote operation of a Lidar mounted on the rooftop of a beachside building. Near-continuous (5Hz) subaerial profile and swash measurements were observed throughout the entire 2.5 month post-storm recovery period. The results provide new insight into the temporal progression of post-storm berm recovery, identifying three consecutive phases of immediate post-storm deposition, intermediate gradual recovery and final rapid recovery with the welding of intertidal sandbars. Significant berm growth was observed during the final phase with rates of subaerial volume deposition three times greater than those during initial phases. Relatively milder nearshore wave conditions as well as flatter intertidal gradients were found to distinguish rapid from more gradual recovery phases. Beachface progradation and berm aggradation during recovery are captured in detail by the high temporal resolution of the fixed Lidar data, providing insight into parameters governing berm recovery on microtidal, wave-dominated sandy coastlines.

AB - The recovery of beaches following the destructive impact of storms is of significant economic, social and environmental value to coastal communities. This study investigates the recovery of a berm following removal by a storm at Narrabeen-Collaroy Beach, Australia using the unique deployment and remote operation of a Lidar mounted on the rooftop of a beachside building. Near-continuous (5Hz) subaerial profile and swash measurements were observed throughout the entire 2.5 month post-storm recovery period. The results provide new insight into the temporal progression of post-storm berm recovery, identifying three consecutive phases of immediate post-storm deposition, intermediate gradual recovery and final rapid recovery with the welding of intertidal sandbars. Significant berm growth was observed during the final phase with rates of subaerial volume deposition three times greater than those during initial phases. Relatively milder nearshore wave conditions as well as flatter intertidal gradients were found to distinguish rapid from more gradual recovery phases. Beachface progradation and berm aggradation during recovery are captured in detail by the high temporal resolution of the fixed Lidar data, providing insight into parameters governing berm recovery on microtidal, wave-dominated sandy coastlines.

KW - Accretion

KW - Beach recovery

KW - Berm

KW - Lidar

KW - Narrabeen-Collaroy

UR - http://www.scopus.com/inward/record.url?scp=85044425617&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:85044425617

SP - 872

EP - 878

T2 - Australasian Coasts and Ports 2017 Conference

Y2 - 21 June 2017 through 23 June 2017

ER -

High-frequency observations of berm recovery using a continuous scanning Lidar

Abstract

Conference

Funding

Keywords

ASJC Scopus subject areas

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