An integral approach to design the Roggenplaat intertidal shoal nourishment
J. van der Werf (Deltares, University of Twente)
P. L. M. De Vet (Deltares, TU Delft - Environmental Fluid Mechanics)
M. P. Boersema (HZ University of Applied Sciences, Ministry of Infrastructure and the Environment)
Tjeerd J. Bouma (HZ University of Applied Sciences, Universiteit Utrecht)
A. J. Nolte (Deltares)
R. A. Schrijvershof (Deltares)
L.M. Soissons (Universiteit Utrecht)
J. Stronkhorst (HZ University of Applied Sciences, Deltares)
E. van Zanten (Rijkswaterstaat)
T. Ysebaert (Universiteit Utrecht, Wageningen University & Research)
More Info
expand_more
Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.
Abstract
The Eastern Scheldt, a tidal basin in the southwest of The Netherlands, underwent large physical and ecological changes due to a system-wide human interference. The construction of a storm surge barrier at the seaward side and closure of the upstream branches in the 1980s resulted in intertidal flat erosion. This has far reaching consequences for the ecological functioning of these habitats, especially as foraging ground for many wader species. Therefore, a 1.3 million m3 sand nourishment is foreseen on the Roggenplaat intertidal shoal to mitigate the erosion and preserve suitable foraging habitat for waders for the coming 25 years. This paper presents an integral nourishment design approach. It consists of the following steps: (i) understanding the morphology and ecology, (ii) translation of the nourishment objective into an evaluation framework, (iii) construction of a suitability map indicating potential nourishment locations, (iv) generation of nourishment designs, (v) short-term morphodynamic numerical model simulations, (vi) estimation of the long-term shoal development using a simplified approach, (vii) integral evaluation leading to the preferred design. This integral approach resulted in a design that is expected to fulfill the Roggenplaat nourishment objective, accounting for ecological, morphological, economical and technical aspects. This integrated approach could form a basis for future intertidal shoal nourishment designs worldwide.
help_outline