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The Joy of Counterintuitivity
Published in Elizabeth Mossop, Sustainable Coastal Design and Planning, 2018
The sand engine (Stive et al., 2013) is a project off the Western Coast of the Netherlands that saw a one-off deposit of 21.5 million cubic meters of sand that will stay in the system for about 20 years. It will allow the development of a permanent ecosystem. The sand is redistributed along the coast by currents and wind, natural forces that deposit sand in the right places to build up coastal protection and ecological systems, providing an environment for recreational use (De Vlieger, 2017).
Developing a nature-based coastal defence strategy for Australia
Published in Australian Journal of Civil Engineering, 2019
RebeccaL. Morris, Elisabeth M. A. Strain, Teresa M. Konlechner, Benedikt J. Fest, David M. Kennedy, Stefan K. Arndt, Stephen E. Swearer
Pilot projects have been cited as key to the success of the wider implementation of nature-based solutions (Borsje et al. 2017). As the scientific understanding of many nature-based approaches is still in its infancy (Bouma et al. 2014; Morris et al. 2018), pilot projects can facilitate large interdisciplinary research programmes to increase the predictability of these systems. For instance, accompanying the mega sand-nourishment pilot (21 million m3 sand across 128 ha) known as the ‘Sand Engine’ in the Netherlands are extensive research programmes across six different disciplines: coastal safety; marine and terrestrial ecology; hydrology; geochemistry; and governance (Borsje et al. 2017). These strong knowledge alliances among different disciplines, research institutes, government and industry are supported by an organisational platform (Dutch network of coastal science) that co-ordinate yearly conferences to facilitate collaboration (Borsje et al. 2017). Interdisciplinary teams are essential to the evaluation of nature-based coastal defence (Morris et al. 2019b). This is not only from the ecological and engineering perspectives of understanding how to design nature-based solutions but also from economic and socio-political perspectives to understand their cost-effectiveness compared to traditional structures, social acceptance and regulation. Even where there is enough scientific information to implement a particular nature-based solution more broadly, social acceptance can be a barrier, especially where large areas of the foreshore are privately owned (Wowk and Yoskowitz 2017).
Developments in the management of flood defences and hydraulic infrastructure in the Netherlands
Published in Structure and Infrastructure Engineering, 2018
Sebastiaan N. Jonkman, Hessel G. Voortman, Wouter Jan Klerk, Saskia van Vuren
The challenges for implementation include the reinforcement of a large number of dikes based on the new probabilistic requirements. Additionally, new strategies, such as nature-based solutions are gaining increasing attention. Examples are large-scale nourishments along the coast (e.g. the sand engine) and the room for rivers programme. These nature-based solutions are more dynamic with respect to their performance and development over time and are thereby characterised by larger uncertainties than typical structural solutions. This may hamper acceptance amongst end users and therefore hinder inclusion of nature-based solutions in the national flood protection programme, therefore, it is important to assess and incorporate these types of solutions in the new probabilistic framework for flood risk management. See Sections 3 and 4 for a further discussion of challenges and examples.
Optimum use of dredged materials for sustainable shoreline management in Nile Delta
Published in Water Science, 2018
The placement of dredged materials directly at shoreline gives better results than dumping at contour depth of (−3.00 m). Moreover, increasing dumping rate or increasing the quantity of dredged materials placed at shoreline will reduce the sediment transport rate, which means increase the time needed for bed material movements, and as a results achieve more shoreline stability. The results of dumping almost the quantities of dredged materials updraft the eroded area of Izbat-Alburj (scenario of sand-engine) has a small effect in reducing the erosion problem or rehabilitating shoreline at the vicinity of Izbat-Alburj comparing with the directly placement of dredged materials at the shoreline facing Izbat-Alburj vicinity. While, improving the results of using sand-engine method need more investigation.