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Simulating spatiotemporal aeolian sediment supply at a mega nourishment. / Hoonhout, Bas; de Vries, Sierd.

In: Coastal Engineering, Vol. 145, 01.03.2019, p. 21-35.

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Hoonhout, Bas ; de Vries, Sierd. / Simulating spatiotemporal aeolian sediment supply at a mega nourishment. In: Coastal Engineering. 2019 ; Vol. 145. pp. 21-35.

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@article{32c3c7a27fe140b286fee18df25e974d,
title = "Simulating spatiotemporal aeolian sediment supply at a mega nourishment",
abstract = "Mega nourishments are a novel approach to stimulating coastal safety and resilience. Mega nourishments are intended to spread along the coast on a decadal time scale by natural sediment transport processes with a minimum of intrusion into the natural coastal system. The supratidal morphodynamic behaviour of mega nourishments is not well understood due to complexities introduced by limitations in sediment availability to aeolian sediment transport. Consequently, the effectiveness of mega nourishments to stimulate coastal safety and to influence coastal landscape and habitat development remains unknown. In this paper we present a detailed 4-year hindcast of the morphological development of the Sand Motor mega nourishment in The Netherlands. We use the aeolian sediment transport and availability model AEOLIS that focuses specifically on the simulation of spatiotemporal variations in sediment availability. The model includes the recurrence relation between sediment availability and aeolian sediment transport through self-grading and beach armoring. We show that the model is able to reproduce multi-annual aeolian sediment transport rates in the Sand Motor domain in the four years after its construction. The RMSE is 3⋅104m3 (7% of the total sediment accumulation) and R2 is 0.93 when comparing timeseries of total sediment accumulation in the dunes, dune lake and lagoon. The combination of spatial and temporal variations in aeolian sediment availability, due to the combined influence of soil moisture, sediment sorting and beach armoring, is essential for an accurate estimate of the total sedimentation volume. The simulated feedback between aeolian sediment availability and transport is required for accurately describing compartmentalization of the beach and locating the aeolian sediment source areas in the Sand Motor domain.",
keywords = "Aeolian sediment supply, aeolian sediment transport, Aeolis, Beach armoring, Mega nourishment, Numerical model, Sand motor",
author = "Bas Hoonhout and {de Vries}, Sierd",
note = "Accepted Author Manuscript",
year = "2019",
month = mar,
day = "1",
doi = "10.1016/j.coastaleng.2018.12.007",
language = "English",
volume = "145",
pages = "21--35",
journal = "Coastal Engineering",
issn = "0378-3839",
publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Simulating spatiotemporal aeolian sediment supply at a mega nourishment

AU - Hoonhout, Bas

AU - de Vries, Sierd

N1 - Accepted Author Manuscript

PY - 2019/3/1

Y1 - 2019/3/1

N2 - Mega nourishments are a novel approach to stimulating coastal safety and resilience. Mega nourishments are intended to spread along the coast on a decadal time scale by natural sediment transport processes with a minimum of intrusion into the natural coastal system. The supratidal morphodynamic behaviour of mega nourishments is not well understood due to complexities introduced by limitations in sediment availability to aeolian sediment transport. Consequently, the effectiveness of mega nourishments to stimulate coastal safety and to influence coastal landscape and habitat development remains unknown. In this paper we present a detailed 4-year hindcast of the morphological development of the Sand Motor mega nourishment in The Netherlands. We use the aeolian sediment transport and availability model AEOLIS that focuses specifically on the simulation of spatiotemporal variations in sediment availability. The model includes the recurrence relation between sediment availability and aeolian sediment transport through self-grading and beach armoring. We show that the model is able to reproduce multi-annual aeolian sediment transport rates in the Sand Motor domain in the four years after its construction. The RMSE is 3⋅104m3 (7% of the total sediment accumulation) and R2 is 0.93 when comparing timeseries of total sediment accumulation in the dunes, dune lake and lagoon. The combination of spatial and temporal variations in aeolian sediment availability, due to the combined influence of soil moisture, sediment sorting and beach armoring, is essential for an accurate estimate of the total sedimentation volume. The simulated feedback between aeolian sediment availability and transport is required for accurately describing compartmentalization of the beach and locating the aeolian sediment source areas in the Sand Motor domain.

AB - Mega nourishments are a novel approach to stimulating coastal safety and resilience. Mega nourishments are intended to spread along the coast on a decadal time scale by natural sediment transport processes with a minimum of intrusion into the natural coastal system. The supratidal morphodynamic behaviour of mega nourishments is not well understood due to complexities introduced by limitations in sediment availability to aeolian sediment transport. Consequently, the effectiveness of mega nourishments to stimulate coastal safety and to influence coastal landscape and habitat development remains unknown. In this paper we present a detailed 4-year hindcast of the morphological development of the Sand Motor mega nourishment in The Netherlands. We use the aeolian sediment transport and availability model AEOLIS that focuses specifically on the simulation of spatiotemporal variations in sediment availability. The model includes the recurrence relation between sediment availability and aeolian sediment transport through self-grading and beach armoring. We show that the model is able to reproduce multi-annual aeolian sediment transport rates in the Sand Motor domain in the four years after its construction. The RMSE is 3⋅104m3 (7% of the total sediment accumulation) and R2 is 0.93 when comparing timeseries of total sediment accumulation in the dunes, dune lake and lagoon. The combination of spatial and temporal variations in aeolian sediment availability, due to the combined influence of soil moisture, sediment sorting and beach armoring, is essential for an accurate estimate of the total sedimentation volume. The simulated feedback between aeolian sediment availability and transport is required for accurately describing compartmentalization of the beach and locating the aeolian sediment source areas in the Sand Motor domain.

KW - Aeolian sediment supply

KW - aeolian sediment transport

KW - Aeolis

KW - Beach armoring

KW - Mega nourishment

KW - Numerical model

KW - Sand motor

UR - http://www.scopus.com/inward/record.url?scp=85059118440&partnerID=8YFLogxK

U2 - 10.1016/j.coastaleng.2018.12.007

DO - 10.1016/j.coastaleng.2018.12.007

M3 - Article

AN - SCOPUS:85059118440

VL - 145

SP - 21

EP - 35

JO - Coastal Engineering

JF - Coastal Engineering

SN - 0378-3839

ER -

ID: 49445722