ShoreScape: Nature-Based Design for Urban Coastal Zones

Since the 1990’s the Netherlands has changed its coastal defence system from hard to sediment-based measures, compensating coastal erosion by adding sediment to its sandy shores. In order to keep pace with sea level rise, more nourishments will be needed in the future, including the ‘Building with Nature’ (BwN) technique: large scale nourishments to feed the coastal system for a longer period of time and using natural forces to bring sediment ashore. However, these dynamic nourishments are still in development and put new demands on spatial coastal planning to support dune formation and increase the coastal buffer zone.The objective of this paper is twofold: (1) to discuss how the interactions between the land-shaping processes induced by the nourishments and other coastal functions can be improved as stepping-stones to new design principles for integrated coastal planning enhancing BWN processes, and (2) to provide an overview of initial design principles. Two Dutch cases serve to illustrate the land-shaping processes and the involved design principles.The Walcheren case shows a regional design study for the positioning of BwN (mega) nourishments. This mega-nourishment feeds the narrow dune system as an alternative to the current (more frequent) ways of local beach nourishment. By zoning and staging the nourishment and land use, not only coastal safety, but also other coastal functions, such as recreation, waterfronts and ecology can be improved.The Sand Motor is a prime BwN experiment of mega nourishments in the south of Holland. It is now seven years in progress, featuring an accreting shore, new embryonic dune formation and increased beach recreation. The study shows on a local scale how morphological processes and urban use have evolved and how these processes could be altered and integrated in order to enhance BwN fore dune formation to enlarge the coastal buffer against erosion.The case studies show that the regional design and spatial zoning of nourishment dynamics can help to fine-tune BwN with other coastal functions, such as waterfronts and nature reserves. On the local level dune formation can be improved by adjusting the initial nourishment design, urban and ecological layout to the desired sand transport, using natural landscaping mechanisms as design principle. These will be investigated further in the ShoreScape project.Green Open Access added to TU Delft Institutional Repository 'You share, we take care!' - Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Landscape Architectur

Aeolis_Gap the Border: Landscape Architecture On Site, Oerol Festival 2018

Expected sea-level rise poses an increasing threat to Dutch coastal areas. Continuoushuman interventions in these areas aim to prevent the lowlands from drowning.This booklet shows the process and results of aeolis-gap the border developed during the elective course Landscape Architecture ON Site, offered by TU Delft MSc Landscape Architecture. As part of the research program related to coastal defence, the group developed an architectural intervention in the dune landscape to accelerate the growth of dunes.The Wadden islands have been barrier islands for the Netherlands for hundreds of years but due to the rising sea level they are under great pressure. Therefore, the Oerol Festival at Terschelling is a great platform to experiment and understand this concept and interweaving it with art. Landscape, art and science come together in this project. The design process is based on experiences of the place, experiments, prototyping results of theoretical and landscape studies, workshops and brainstorm sessions.Landscape Architectur

Urban dunes: promoting BwN dune formation at nourished beaches through spatial design

Landscape Architectur

Beach-dune modelling in support of Building with Nature for an integrated spatial design of urbanized sandy shores

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, the knowledge and the prediction of sediment dynamics and beach-dune morphology thus play an essential role. This expertise typically resides with coastal scientists who have condensed their knowledge in various types of morphological models that serve different purposes and rely on different assumptions, thus have their specific strengths and limitations. This paper identifies morphological information needs for the integrated spatial design of urbanized sandy shores using BwN principles, outlines capabilities of different types of morphological models to support this and identifies current gaps between the two. A clear mismatch arises from the absence of buildings and accompanying human activities in current numerical models simulating morphological developments in beach-dune environments.Vol. 7 (2021): Building with Nature perspectives: Cross-disciplinary BwN approaches in coastal regions. ISBN 978-94-6366-379-3Landscape Architectur