Uncertainties in shoreline position analysis: the role of run-up and tide in a gentle slope beach

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Abstract

In recent decades in the Mediterranean Sea, high anthropic pressure from increasing economic and touristic development has affected several coastal areas. Today the erosion phenomena threaten human activities and existing structures, and interdisciplinary studies are needed to better understand actual coastal dynamics. Beach evolution analysis can be conducted using GIS methodologies, such as the well-known Digital Shoreline Analysis System (DSAS), in which error assessment based on shoreline positioning plays a significant role. In this study, a new approach is proposed to estimate the positioning errors due to tide and wave run-up influence. To improve the assessment of the wave run-up uncertainty, a spectral numerical model was used to propagate waves from deep to intermediate water and a Boussinesqtype model for intermediate water up to the swash zone. Tide effects on the uncertainty of shoreline position were evaluated using data collected by a nearby tide gauge. The proposed methodology was applied to an unprotected, dissipative Sicilian beach far from harbors and subjected to intense human activities over the last 20 years. The results show wave run-up and tide errors ranging from 0.12 to 4.5m and from 1.20 to 1.39 m, respectively.
Lingua originaleEnglish
pagine (da-a)661-671
Numero di pagine11
RivistaOcean Science
Volume13
Stato di pubblicazionePublished - 2017

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shoreline
tide
beach
intermediate water
positioning
human activity
wave runup
methodology
tide gauge
systems analysis
harbor
GIS
erosion
analysis
economics

All Science Journal Classification (ASJC) codes

  • Oceanography
  • Palaeontology

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title = "Uncertainties in shoreline position analysis: the role of run-up and tide in a gentle slope beach",
abstract = "In recent decades in the Mediterranean Sea, high anthropic pressure from increasing economic and touristic development has affected several coastal areas. Today the erosion phenomena threaten human activities and existing structures, and interdisciplinary studies are needed to better understand actual coastal dynamics. Beach evolution analysis can be conducted using GIS methodologies, such as the well-known Digital Shoreline Analysis System (DSAS), in which error assessment based on shoreline positioning plays a significant role. In this study, a new approach is proposed to estimate the positioning errors due to tide and wave run-up influence. To improve the assessment of the wave run-up uncertainty, a spectral numerical model was used to propagate waves from deep to intermediate water and a Boussinesqtype model for intermediate water up to the swash zone. Tide effects on the uncertainty of shoreline position were evaluated using data collected by a nearby tide gauge. The proposed methodology was applied to an unprotected, dissipative Sicilian beach far from harbors and subjected to intense human activities over the last 20 years. The results show wave run-up and tide errors ranging from 0.12 to 4.5m and from 1.20 to 1.39 m, respectively.",
author = "Giuseppe Ciraolo and Giorgio Manno and {Lo Re}, Carlo",
year = "2017",
language = "English",
volume = "13",
pages = "661--671",
journal = "Ocean Science",
issn = "1812-0784",
publisher = "European Geosciences Union",

}

TY - JOUR

T1 - Uncertainties in shoreline position analysis: the role of run-up and tide in a gentle slope beach

AU - Ciraolo, Giuseppe

AU - Manno, Giorgio

AU - Lo Re, Carlo

PY - 2017

Y1 - 2017

N2 - In recent decades in the Mediterranean Sea, high anthropic pressure from increasing economic and touristic development has affected several coastal areas. Today the erosion phenomena threaten human activities and existing structures, and interdisciplinary studies are needed to better understand actual coastal dynamics. Beach evolution analysis can be conducted using GIS methodologies, such as the well-known Digital Shoreline Analysis System (DSAS), in which error assessment based on shoreline positioning plays a significant role. In this study, a new approach is proposed to estimate the positioning errors due to tide and wave run-up influence. To improve the assessment of the wave run-up uncertainty, a spectral numerical model was used to propagate waves from deep to intermediate water and a Boussinesqtype model for intermediate water up to the swash zone. Tide effects on the uncertainty of shoreline position were evaluated using data collected by a nearby tide gauge. The proposed methodology was applied to an unprotected, dissipative Sicilian beach far from harbors and subjected to intense human activities over the last 20 years. The results show wave run-up and tide errors ranging from 0.12 to 4.5m and from 1.20 to 1.39 m, respectively.

AB - In recent decades in the Mediterranean Sea, high anthropic pressure from increasing economic and touristic development has affected several coastal areas. Today the erosion phenomena threaten human activities and existing structures, and interdisciplinary studies are needed to better understand actual coastal dynamics. Beach evolution analysis can be conducted using GIS methodologies, such as the well-known Digital Shoreline Analysis System (DSAS), in which error assessment based on shoreline positioning plays a significant role. In this study, a new approach is proposed to estimate the positioning errors due to tide and wave run-up influence. To improve the assessment of the wave run-up uncertainty, a spectral numerical model was used to propagate waves from deep to intermediate water and a Boussinesqtype model for intermediate water up to the swash zone. Tide effects on the uncertainty of shoreline position were evaluated using data collected by a nearby tide gauge. The proposed methodology was applied to an unprotected, dissipative Sicilian beach far from harbors and subjected to intense human activities over the last 20 years. The results show wave run-up and tide errors ranging from 0.12 to 4.5m and from 1.20 to 1.39 m, respectively.

UR - http://hdl.handle.net/10447/240736

UR - https://doi.org/10.5194/os-13-661-2017, 2017

M3 - Article

VL - 13

SP - 661

EP - 671

JO - Ocean Science

JF - Ocean Science

SN - 1812-0784

ER -