Searched for: author:"De Schipper, M.A."
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van Bemmelen, C.W.T. (author), de Schipper, M.A. (author), Darnall, J. (author), Aarninkhof, S.G.J. (author)
Beach scarps are nearly vertical seaward facing sandy cliffs within the cross-shore beach profile. These features are often associated with eroding (nourished) coastlines and can reach heights of O(2–3 m). An analysis of a six-year dataset of beach scarp presence at the nourished Sand Engine beach shows that the formation of beach scarps at the...
journal article 2020
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Kroon, J. (author), de Schipper, M.A. (author), van Gelder, P.H.A.J.M. (author), Aarninkhof, S.G.J. (author)
Sand nourishments are increasingly applied as adaptive coastal protection measures. Predictions of the evolution of these nourishments and their impact on the surrounding coastline contain many uncertainties. The sources that add to this uncertainty can be delineated between intrinsic and epistemic uncertainty, i.e. inevitably in the system...
journal article 2020
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Luijendijk, A.P. (author), de Schipper, M.A. (author), Ranasinghe, Roshanka (author)
Thirty one percent (31%) of the world's coastline consists of sandy beaches and dunes that form a natural defense protecting the hinterland from flooding. A common measure to mitigate erosion along sandy beaches is the implementation of sand nourishments. The design and acceptance of such a mitigating measure require information on the expected...
journal article 2019
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Huisman, B.J.A. (author), Walstra, Dirk Jan R. (author), Radermacher, Max (author), de Schipper, M.A. (author), Ruessink, B. Gerben (author)
Shoreface nourishments are commonly applied for coastal maintenance, but their behaviour is not well understood. Bathymetric data of 19 shoreface nourishments located at alongshore uniform sections of the Dutch coast were therefore analyzed and used to validate an efficient method for predicting the erosion of shoreface nourishments. Data shows...
journal article 2019
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Wengrove, M. E. (author), Foster, D. L. (author), Lippmann, T. C. (author), de Schipper, M.A. (author), Calantoni, J. (author)
Bedload transport is an important mechanism for sediment flux in the nearshore. Yet few studies examine the relationship between bedform evolution and net sediment transport. Our work contributes concurrent observations of bedform mobility and bedload transport in response to wave dominant, current dominant, and combined wave-current flows in...
journal article 2019
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Radermacher, M. (author), de Schipper, M.A. (author), Reniers, A.J.H.M. (author)
Operational nearshore current forecasts based on numerical model simulations are gaining popularity as a measure to increase the safety of swimmers. Applying remotely-sensed bathymetry in these model simulations is often proposed in order to cope with rapidly changing nearshore bathymetry. Errors in the remotely-sensed bathymetry may...
journal article 2018
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Radermacher, M. (author), de Schipper, M.A. (author), Price, Timothy (author), Huisman, B.J.A. (author), Aarninkhof, S.G.J. (author), Reniers, A.J.H.M. (author)
The behaviour of subtidal sandbars can be strongly influenced by the introduction of sand nourishments in the coastal system. This study focuses on the impact of nourishments on subtidal bar behaviour at spatio-temporal scales beyond a single nourishment project. It aims to determine the long-term behaviour of subtidal sandbars along an entire...
journal article 2018
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Huisman, B.J.A. (author), Ruessink, B. G. (author), de Schipper, M.A. (author), Luijendijk, A.P. (author), Stive, M.J.F. (author)
Large perturbations in the coastline, such as the 'Sand Motor' nourishment (∼21 million m<sup>3</sup>) at the Holland coast, can initiate considerable spatial and temporal changes in the median grain size (D<sub>50</sub>) of the sea bed on the lower shoreface. The relevance of hydrodynamic conditions for the development of the heterogeneity...
journal article 2018
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Athanasiou, Panagiotis (author), de Boer, W.P. (author), Tonnon, Pieter Koen (author), Yoo, Jeseon (author), de Schipper, M.A. (author), de Vries, S. (author), Ranasinghe, Roshanka (author), Reniers, A.J.H.M. (author)
Nearshore sandbar patterns can affect the hydrodynamics and, as a result, the beach morphodynamics in the nearshore zone. Hence, spatial and temporal variability in the sandbars can influence beach accretion and erosion. Understanding the variability of the sandbar system can therefore be crucial for informed coastal zone management. So far, the...
journal article 2018
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Kroon, J. (author), de Schipper, M.A. (author), Aarninkhof, S.G.J. (author)
There are different sources of uncertainty in morphological modeling on time scales of years. The standard deterministic modelling approach does not provide any information on the amount of uncertainty contained in a forecast. This lack of information could provide a false sense of accuracy and skill. Quantitative insight in these prediction...
journal article 2018
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Hopkins, J.A. (author), de Schipper, M.A. (author)
Accurate predictions of the fate of sand nourishments in the nearshore are critical to the management of eroding shorelines. The effectiveness of these nourishments depends on wave and current conditions, which vary with nourishment shape, size, and location. Here, observations of artificial sand mounds, including a new laboratory experiment,...
journal article 2018
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Valsamidis, Antonios (author), Reeve, Dominic (author), de Schipper, M.A. (author), Dodd, Nicholas (author)
Mega-nourishment is an innovative soft coastal protection method (Stive et al., 2013) which was applied for first time in 2011 in the Netherlands. Although conventional nourishments are considerably smaller in size, and designed to maintain their sediment volume to the specific site of their application for as long as possible, mega-nourishments...
journal article 2018
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de Vries, S. (author), de Schipper, M.A. (author), Roest, Lambertus W.M. (author), Luijendijk, A.P. (author), Aarninkhof, S.G.J. (author)
Feeder nourishments, where sand quantities of O (10 million m³) are placed locally to feed adjacent coastal stretches, are suggested nowadays as an alternative for local, smaller-scale nourishments (&lt; 1 million m³). These feeder nourishments rely on natural forces to spread the sediment. While processes that govern this spreading such as...
journal article 2018
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Wengrove, M. E. (author), Foster, D. L. (author), Lippmann, T. C. (author), de Schipper, M.A. (author), Calantoni, J. (author)
Although combined wave-current flows in the nearshore coastal zone are common, there are few observations of bedform response and inherent geometric scaling in combined flows. Our effort presents observations of bedform dynamics that were strongly influenced by waves, currents, and combined wave-current flow at two sampling locations...
journal article 2018
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Vandebroek, Elena (author), Lindenbergh, R.C. (author), van Leijen, F.J. (author), de Schipper, M.A. (author), de Vries, S. (author), Hanssen, R.F. (author)
This paper presents a semi-automated approach to detecting coastal shoreline change with high spatial- and temporal-resolution using X-band synthetic aperture radar (SAR) data. The method was applied at the Sand Motor, a “mega-scale” beach nourishment project in the Netherlands. Natural processes, like waves, wind, and tides, gradually...
journal article 2017
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de Schipper, M.A. (author), Darnall, John (author), de Vries, S. (author), Reniers, A.J.H.M. (author)
Five years of beach topography data were examined to map the spatio-temporal patterns in beach scarp existence. Data of the Sand Engine were used, a mega scale nourishment implemented in 2011 at the Dutch coast. Topographic data were automatically and manually analyzed to recognize scarps in the dataset. Moments of destruction and persistence of...
conference paper 2017
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Huisman, B.J.A. (author), Vargas Solis, Astrid (author), de Schipper, M.A. (author), Radermacher, M. (author), Ranasinghe, Roshanka (author)
Impact of spatial variability in the nearshore bathymetry on net sediment transport rates has been investigated for a selection of observed beach states at the Dutch coast. The beach states comprise a longshore bar trough and two transverse bar rip situations, which were present at the large scale Sand Motor nourishment at the Holland coast....
conference paper 2017
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Kroon, J. (author), de Schipper, M.A. (author), den Heijer, C. (author), Aarninkhof, S.G.J. (author), van Gelder, P.H.A.J.M. (author)
In the present time of sea-level rise and climate change a global shift has occurred toward sandy coastal protection measures and Building with Nature. These type of protection measures impose extra uncertainty on the instantaneous state of the coastal system over time for which present deterministic forecasting techniques are not capable of...
conference paper 2017
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Radermacher, M. (author), Geerlof, Wessel (author), de Schipper, M.A. (author), Huisman, B.J.A. (author), Aarninkhof, S.G.J. (author), Reniers, A.J.H.M. (author)
The presence of complex nearshore sand bar patterns (i.e. alongshore bathymetric variability) has an impact on local currents, affecting recreational safety and nearshore mixing processes. This study assesses the evolution of alongshore bathymetric variability along the Delfland coast in The Netherlands, over the first 5 years after construction...
conference paper 2017
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Huisman, B.J.A. (author), de Schipper, M.A. (author), Ruessink, B. G. (author)
Bed sediment composition, with a focus on the median grain size D<sub>50</sub>, was investigated at a large-scale nourishment (The ‘Sand Motor’) at the Dutch coast (∼21.5 million m<sup>3</sup> sand). Considerable alongshore heterogeneity of the bed composition (D<sub>50</sub>) was observed as the Sand Motor evolved over time with (1)...
journal article 2016
Searched for: author:"De Schipper, M.A."
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