Constructing notches in foredunes: Effect on sediment dynamics in the dune hinterland

Riksen, Michel; Huiskes, H.P.J.; Krol, Johan; Slim, P.A.

doi:10.1016/j.geomorph.2015.10.021

Cited by 20 publications

(21 citation statements)

References 24 publications

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“…Notches that forced the wind to accelerate because of, for example, a convex notch floor or notch narrowing in the landward direction, were more effective in stimulating landward aeolian transport (Pye and Blott, 2016). Finally, Riksen et al (2016) measured an influx of sand through three notches on the barrier island of Ameland, the Netherlands, to some 50 m from the foredune crest. They ascribed this rather limited distance to the small width (about 20 m) of the notches and their large alongshore separation.…”

Section: Introductionmentioning

confidence: 99%

Coastal dune dynamics in response to excavated foredune notches

Ruessink

Arens²,

Kuipers³

et al. 2018

Aeolian Research

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Section: Introductionmentioning

confidence: 99%

Coastal dune dynamics in response to excavated foredune notches

Ruessink

Arens²,

Kuipers³

et al. 2018

Aeolian Research

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“…Nowadays, in order to maintain or even increase dune mobility, the rejuvenated dune systems are often connected to the beach and foredunes through the excavation of foredune notches. This has been shown to result in a sustained input of wind-blown calcareous beach sand and more diverse living conditions for pioneer vegetation, e.g., due to higher levels of sand burial, wind speeds or salt spray (Riksen et al, 2016;Ruessink et al, 2017). However, as Fig.…”

Section: Dune Development Potential In Relation To Anthropogenic Impactsmentioning

confidence: 99%

Accommodation space indicates dune development potential along an urbanized and frequently nourished coastline

Nolet

Riksen

2019

Earth Surf. Dynam.

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Abstract. With densely populated areas well below mean sea level, the Netherlands relies heavily on its dunes to ensure coastal safety. About half of the sandy coastline, however, is subject to structural marine erosion and requires frequent sand nourishment as a counteractive measure. A key component of present-day coastal safety policy is creating favorable conditions for natural dune development. These conditions essentially involve (1) a steady supply of wind-blown sand towards (2) a wide accommodation space where sand can accumulate and dunes are sheltered from frequent storm surge impacts. This paper examines to what extent an experimental mega-scale beach nourishment (termed Zandmotor in Dutch) has contributed to creating accommodation space favorable for dune development. Using publicly available airborne lidar data and Sentinel-2 satellite imagery, favorable accommodation space is identified by comparing recent changes in coastal morphology against dune vegetation-cover dynamics. With a focus on European marram grass (Ammophila arenaria) as the most prominent dune-building species, this paper demonstrates that the Zandmotor supports an especially high potential for incipient (embryo) dunes to develop as most of its favorable accommodation space is located on the beach. However, considering the conditions required for successful marram grass establishment as well as persistent anthropogenic disturbances arising from recreation and nature management practices, it is not likely that dune development along this urbanized coastline reaches its full potential.

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“…This can particularly occur where the topsoil is hydrophobic due to the presence of organic matter [51]. Vegetation induced discontinuities can be caused by several factors: increased plant mortality due to local sand erosion or excessive accumulation, degeneration of older patches of vegetation due to soil nutrient depletion [52] and due to an increased soil water repellency related with the accumulation of plant-derived hydrophobic compounds [53,54], human induced weakening or removal of vegetation (e.g., trail formation [55][56][57]), as part of coastal management strategies, (e.g., [15,38,41,58,59]), animal grazing or a decrease in water availability due to a climatic change, (e.g., [13]). This discontinuities caused by vegetation result in a local increase of the bed shear stress and exposure of underlying sand to erosion.…”

Section: Initiationmentioning

confidence: 99%

Feedbacks between Biotic and Abiotic Processes Governing the Development of Foredune Blowouts: A Review

Schwarz

Brinkkemper

Ruessink

2018

JMSE

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This paper reviews the initiation, development, and closure of foredune blowouts with focus on biotic-abiotic interactions. There is a rich body of literature describing field measurements and model simulations in and around foredune blowouts. Despite this abundance of data there is no conceptual framework available linking biotic and abiotic observations to pathways of blowout development (e.g., erosional blowout growth or vegetation induced blowout closure). This review identifies morphological and ecological processes facilitating the transition between blowout development stages and sets them in the context of existing conceptual frameworks describing biotic-abiotic systems. By doing so we are able to develop a new conceptual model linking blowout development to the dominance of its governing processes. More specifically we link blowout initiation to the dominance of abiotic (physical) processes, blowout development to the dominance of biotic-abiotic (bio-geomorphological) processes and blowout closure to the dominance of biotic (ecological) processes. Subsequently we identify further steps to test the proposed conceptual model against existing observations and show possibilities to include it in numerical models able to predict blowout development for various abiotic and biotic conditions.

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Constructing notches in foredunes: Effect on sediment dynamics in the dune hinterland

Cited by 20 publications

References 24 publications

Coastal dune dynamics in response to excavated foredune notches

Coastal dune dynamics in response to excavated foredune notches

Accommodation space indicates dune development potential along an urbanized and frequently nourished coastline

Feedbacks between Biotic and Abiotic Processes Governing the Development of Foredune Blowouts: A Review

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