Jan Mulder

University of Twente | UT · Department of Water Engineering and Management

Raw and processed data of field experiments on aeolian deposition and erosion patterns around beach buildings is hosted at 4TU.ResearchData. See: https://doi.org/10.4121/21285939.v2 Coastal Engineering paper based on data: "The effect of building geometry on the size of aeolian deposition patterns: Scale model experiments at the beach" Coastal Sed...

Shorelines bordering ebb deltas are often subject to deformation by the approach and attachment of ebb-tidal shoals. Although this is a common behaviour, little attention has been paid to the link between shoal migration and the multi-annual development of the adjacent beach-dune system. This study aims to understand beach-dune systems' behaviour d...

Editors: Jill Slinger, Susan Taljaard & Floortje d'Hont Keywords: transdisciplinary research; coastal management; systems analysis; social-ecological systems; integrated environmental management; estuaries, inlets and bays; California; Republic of Ireland; The Netherlands; South Africa; Sri Lanka; Suriname The project Co-designing Coasts using na...

Supplementary material to 'Deposition patterns around buildings at the beach: Effects of building spacing and orientation'. The pdf shows additional orthophotos and elevation maps of some experiments described in the paper.

Supplementary material to 'Deposition patterns around buildings at the beach: Effects of building spacing and orientation'. The video shows a short timelapse of one of the experiments on the effect of building spacing (experiment B in the paper). It shows the build-up of the experiment and the formation of the deposition patterns over the course...

Airflow at the beach creates sand deposition patterns around buildings. To assess how initial deposition patterns depend on the orientation of a building relative to the wind direction and on the spacing between buildings, a series of one-day field experiments was conducted with cuboid scale models, in which 34 configurations were tested. Scale mod...

Raw and processed data related to the Geomorphology article "Deposition patterns around buildings at the beach: Effects of building spacing and orientation" is hosted at 4TU.ResearchData. See: https://doi.org/10.4121/16860145.v3

The long-term physical existence of sandy shores critically depends on a balanced sediment budget. From the principles of Building with Nature it follows that a sustainable protection of sandy shores should employ some form of shore nourishment. In the spatial design process of urbanized sandy shores, where multiple functions must be integrated, th...

Sandy shores worldwide suffer from coastal erosion due to a lack of sediment input and sea-level rise. In response, coastal sand nourishments are executed using ‘Building with Nature’ techniques (BwN), in which the sand balance is amplified and natural dynamics are instrumental in the redistribution of sand, cross- and alongshore. These nourishment...

In sandy environments, like the beach-dune system, buildings not only affect the airflow, but also the aeolian sediment transport in their surroundings. In this study, we determine how the horizontal size of sediment deposition patterns around buildings depends on the building’s dimensions. Four one-day experiments were conducted at the beach using...

Buildings at the beach-dune interface, such as restaurants and (holiday) houses, affect wind-driven sand transport in their surroundings. Hereby they shape the development of the beach-dune system. This can have implications for the flood protection offered by dunes. Therefore, this research aims to understand the effect of buildings at the beach-d...

Sandy shores offer a multitude of ecosystem services; regulating- (e.g. protection against flooding), production- (e.g. drinking water) and cultural services (e.g. recreation), all depending on the quality of supporting services (e.g. natural balances of water, nutrients and sediment). For sandy shores especially, the long-term physical existence i...

Worldwide, buildings are present at the beach and in the dunes for recreation or habitation. Their presence can affect the beach-dune development, because they affect the airflow and Aeolian sediment transport in their surroundings. This might eventually have repercussions for coastal safety. We start examining these effects by studying the local s...

Dunes provide protection against flooding and a high ground to live on. At the same time, the beach and dunes form an attractive area for recreation. This leads to the presence of buildings like restaurants and (holiday) homes at the land-sea interface. These buildings affect wind-driven sand transport and thereby shape the development of the dunes...

Vooroeversuppleties kunnen tegelijkertijd bijdragen aan de waterveiligheid en aan de ecologie en economie in de Oosterschelde. Dit artikel bespreekt deze potentiële bijdragen aan de hand van een praktijkervaring en een rekenvoorbeeld. Het laat zien dat met vooroeversuppleties een reductie van de belasting van dijklichamen mogelijk is waarmee reguli...

The Netherlands is a small and densely populated country located in the deltas of the rivers Rhine, Meuse, Ems and Scheldt and bordering the North Sea. The low-lying polders behind the dunes and dikes are vulnerable to flooding by rivers and the sea. The dunes, beaches, saltmarshes and intertidal flats are highly valued as natural habitats and recr...

Sediment is a natural resource that provides the foundation for living, working and building in lowland delta areas. A sustainable society, therefore, reuses dredged material as a valuable resource. Such reuse matches perfectly to the philosophy of a circular economy. However, it is not yet a common practice. Why is this, what are the bottlenecks a...

We aimed to uncover the origin of ambiguity in flood infrastructure projects using Building with Nature (BwN) design principles. BwN is a new approach in flood management that simultaneously integrates societal goals, such as flood safety and recreation development, with nature development goals by actively using natural dynamics and materials in t...

Coastal dunes play an important role in coastal defense along sandy shorelines of the world. The majority of the shorelines experience erosion and this erosion is expected to accelerate under anthropogenic climate change and subsequent sea level rise. This paper investigates the impact of climate change, sea level rise and current management for co...

There is extensive experience in adaptive management of exposed sandy coastlines through sand nourishment for coastal protection. However, in complex estuarine systems, coastlines are often shortened through damming estuaries to achieve desired safety levels. The Dutch Deltaworks illustrate that this approach disrupts natural sediment fluxes and ha...

This paper discusses and compares results of management interventions to remobilise dunes and obtain more autonomous changes in foredunes resulting from a change in coastal defence policy. In recent decades, nature conservation managers tried to restore aeolian dynamics and dune mobility landward of foredunes to maintain threatened, rare pioneer sp...

Coastal zones around the globe host about two-third of the world population. Besides their economical and social value, coastal areas are extremely valuable from an ecological point of view. Nevertheless, coastal zones are also extremely vulnerable. Erosion and associated loss of land is the most evident sign of this vulnerability. Adequate soluti...

In deze studie worden de ontwikkelingen in de sedimenthuishouding als uitgangspunt beschouwd voor duurzame inrichting van de ZW Delta. Centraal staan de kansen van een sedimentstrategie: het gericht beïnvloeden van de sedimenthuishouding, met het oog op het bereiken van een of meer (beleids)doelen.

GIARDINO, A., MULDER, J., DE RONDE, J and STRONKHORST, J., 2011. Sustainable Development of the Dutch Coast: Present and Future. In: Micallef, A. (ed.), MCRR3-2010 Conference Proceedings, Journal of Coastal Research, Special Issue, No. 61, pp. 166-172 Grosseto, Tuscany, Italy, ISSN 0749-0208. The Netherlands is a low-lying country, where approxim...

A need for upscaling of sand nourishments to guarantee sustainable conditions for safety against flooding and preservation of coastal functions, combined with the need to enhance an integrated coastal zone management in the Netherlands, has initiated a number of pilot experiments. The management background and the approach leading to the pilots are...

Coastal policy in the Netherlands is characterised by three scale levels. The smallest scale is aimed at the preservation of safety agaisnt flooding by maintaining a minimum dune strength; the middle- and large scales at preservation of sustainable safety and of functions in the coastal zone by maintaining the coast line, respectively the sand volu...

Coastal flood risk is defined as a product of probability of event and its effect, measured in terms of damage. The paper is focused on coastal management strategies aimed to decrease risk by decreasing potential damage. We review socio-economic literature to show that total flood damage depends on individual location choices in the housing market...

The destructive earthquake and tsunami waves have caused sudden and immense changes in the morphology of the low-lying coast of Banda Aceh, Sumatra Island, Indonesia on 26 December 2004. Data from different sources and different instants in time used in this study to investigate the morphological responses and developments of two coasts that were a...

Studies on the impact of climate change and sea level rise usually take climate scenarios as their starting point. To support long-term water management planning in the Netherlands, we carried out a study that started at the opposite end of the effect chain. In the study we refer to three aspects of water management, flood defense, drinking water s...

Recent years have shown an ongoing need for marine infrastructure, however the development of large-scale infrastructure projects is associated with uncertainties and delays, increased awareness of the environmental effects and extensive demands on environmental management plans and monitoring programs. The combination of these tendencies drives in...

This paper investigates the impact of very large-scale offshore sand mining along the Dutch coast on waves, currents, sand transport rates and morphology. To this end, we simulate different extreme sand extraction trench geometries (depths between 1 and 17 m, volumes between 10 and 63 x 109 m3) with the process-based modelling system Delft3D. The s...

IntroductionTheoretical frameworkCase study: decision-making process for the extension of Mainport Rotterdam, the NetherlandsAnalysisConclusions AcknowledgmentsReferences

This article was submitted without an abstract, please refer to the full-text PDF file.

Nederlandse delta bekeken door een bodembril Delta's zijn belangrijk. Ze waren de bakermat van beschavingen zoals de Egyptische en de Mesopotamische. Het zijn laaggelegen, waterrijke gebieden; vruchtbaar, voorzien van vaarwegen en daardoor bijna overal ter wereld relatief dichtbevolkt en economisch ontwikkeld. Tegenwoordig staan delta's ook te boek...

This article was submitted without an abstract, please refer to the full-text PDF file.

The Dutch government wants to expand Mainport Rotterdam, one of the largest ports in the world, by land reclamation in the North Sea. This may affect the Wadden Sea, a unique wetlands area protected by the European Bird and Habitat Directives. To assess the impact of the port extension on the Wadden Sea, an Appropriate Assessment procedure was carr...

Climate-change problems in coastal zones are predominantly perceived from a water perspective. However, in accordance with the temporal and spatial scales at which the effects of climate change occur, we propose that coastal zones have to be regarded as sedimentary systems, rather than mere delimitations of a water system. Long-term coastal evoluti...

To assess the long-term safety of a dune-protected coastal area, models are needed for forecasting both long-term coastal evolution and dune erosion due to the occurrence of a super storm. In long-term model forecasts, however, information on dune shape is lost. Explorative calculations show that the output of the event-scale dune erosion model is...

A study of morphological response and development of beaches which were affected by the earthquake and the tsunami on 26th December 2004 has been conducted at two selected coastal sections of Banda Aceh, Indonesia. A simplified principle adopted from one-line shoreline theory in a geospatial analysis utilizing identified shoreline features across t...

Background, Aim and Scope: Coastal and river plains are the surfaces of depositional systems, to which sediment input is a parameter of key-importance. Their habitation and economic development usually requires protection with dikes, quays, etc., which are effective in retaining floods but have the side effect of retarding sedimentation in their hi...

In 2001 the Netherlands have decided on a large-scale coastal policy. To evaluate different implementation scenarios, a large-scale model of the Netherlands coastal system has been developed. Model simulations over a period of 150 years indicate that preservation of the Basal Coast Line, effectively creates boundary conditions for sustainable safet...

Article

The Universal Coastal Intelligence Toolkit (UCIT, pronounced as Use it!), is an instrument that facilitates communication between decision makers and experts in coastal zone management problems. It does so by integrating various types of measurement data, morphological models and coastal state indicators (i.e. specific parameters on which decisions...

Policy development is a dynamic and cyclic process characterised by successive stages of development, implementation and evaluation. An illustration is given in this paper, based on an analysis of the history of coastal policy in the Netherlands over the last two decades. Evaluation in 1995 of the coastal policy of Dynamic Preservation, developed d...

Through historical analysis of the interaction between societal issues, end-user needs and research advances this paper intends to reveal the differences in perception about the usefulness and effectiveness of coastal research that appear to develop during subsequent research programme stages between different stakeholders. These perception differe...

Shoreface and beach nourishments in Denmark, Germany and the Netherlands are investigated in order to check their effectiveness and to develop innovative concepts of nourishment technology in the framework of the EU-sponsored programme on Marine Science and Technology (MAST). A major aim of the project is the evaluation of common design parameters...

The completion in 1986/87 of an open storm-surge barrier in the inlet and of secondary dams in the landward parts of the Oosterschelde tidal basin (SW Netherlands) has had and will continue to have a significant impact on geomorphological developments. An analysis of historic data, and of recent detailed bathymetric and morphodynamic process data,...

As a result of the construction of a storm-surge barrier across the mouth of the Oosterschelde (SW Netherlands) in 1987, the tidal range and mean high water level in the estuary have been reduced permanently to about 88% of their original values. During the final stage of construction (1985–1987) the tidal range and mean high water level were reduc...

Changes in the budget of fine sediments in the Oosterschelde have been measured. These are related to the partial closure of the tidal basin. Before the engineering works, soil texture of most of the basin was sandy. After the works, unconsolidated fine sediments occurred at several locations throughout the Oosterschelde, mainly in the deeper parts...

The construction of three dams induced large changes in the tide range in the Eastern Scheldt, a tidal inlet in the southwestern part of the Netherlands. In 1986 the mean high tide level was reduced by almost one metre. This excluded the greater part of the medium-high marshes almost completely from tidal flooding.The absence of tidal flooding in t...

The Netherlands are managing their sandy frontyard. A necessity, with a country that is for 2/3 below sea-level and with pressure on space constantly growing (for living, working, nature, recreation). The paper discusses coastal characteristics as well as coastal policy and management to realise sustainable safety. It can be concluded that, as resu...

Our coast essentially consists of sand from the bottom of the North Sea that was laid there by rivers in previous interglacial periods. Increasing sea levels have meant that this source has gradually almost ceased to exist with build-up reversing to break down. The balance between the supply and demand for sediment is currently negative but sand su...

In Dutch water systems many human interventions are carried out. These interventions are designed to achieve management goals, like increase protection against flooding, improve environmental quality and/or stimulate the national economy. Decision-makers involved in these kinds of plans have to deal with ecological effects, physical effects, econom...