Equilibrium shoreface profiles: A sediment transport approach
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Equilibrium shoreface profiles : A sediment transport approach. / Aagaard, Troels; Hughes, Michael G.
I: Marine Geology, Bind 390, 2017, s. 321–330.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - Equilibrium shoreface profiles
T2 - A sediment transport approach
AU - Aagaard, Troels
AU - Hughes, Michael G
PY - 2017
Y1 - 2017
N2 - Large-scale coastal behaviour models use the shoreface profile of equilibrium as a fundamental morphological unit that is translated in space to simulate coastal response to, for example, sea level oscillations and variability in sediment supply. Despite a longstanding focus on the shoreface profile and its relevance to predicting coastal response to changing environmental conditions, the processes and dynamics involved in shoreface equilibrium are still not fully understood. Here, we apply a process-based empirical sediment transport model, combined with morphodynamic principles to provide new insight into equilibrium shoreface profile development and shape. The quantitative model is based on field measurements and shows that a balance between onshore sediment transport due to oscillatory wave motion, and offshore sediment transport due to gravity, produces profile shapes that are similar to natural shoreface profiles from the Danish North Sea coast and the southeast Australian coast. Model predictions of equilibrium profile response to the effects of climate change, such as rising sea level, or changing wave climates, are examined. Implementation of the model is straightforward; there is no tuning or calibration and computation times are short. It is therefore easily implemented with repeated iterations to manage uncertainty.
AB - Large-scale coastal behaviour models use the shoreface profile of equilibrium as a fundamental morphological unit that is translated in space to simulate coastal response to, for example, sea level oscillations and variability in sediment supply. Despite a longstanding focus on the shoreface profile and its relevance to predicting coastal response to changing environmental conditions, the processes and dynamics involved in shoreface equilibrium are still not fully understood. Here, we apply a process-based empirical sediment transport model, combined with morphodynamic principles to provide new insight into equilibrium shoreface profile development and shape. The quantitative model is based on field measurements and shows that a balance between onshore sediment transport due to oscillatory wave motion, and offshore sediment transport due to gravity, produces profile shapes that are similar to natural shoreface profiles from the Danish North Sea coast and the southeast Australian coast. Model predictions of equilibrium profile response to the effects of climate change, such as rising sea level, or changing wave climates, are examined. Implementation of the model is straightforward; there is no tuning or calibration and computation times are short. It is therefore easily implemented with repeated iterations to manage uncertainty.
U2 - 10.1016/j.margeo.2016.12.013
DO - 10.1016/j.margeo.2016.12.013
M3 - Journal article
AN - SCOPUS:85011562632
VL - 390
SP - 321
EP - 330
JO - Marine Geology
JF - Marine Geology
SN - 0025-3227
ER -
ID: 178201425