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Scale model of Indian Ocean island allows scientists to assess the impact of rising sea levels

Scientists have built a 50-metre scale replica of a coral reef island to explore how its real-life counterparts might be impacted by rising sea levels. The model has been designed to mimic atoll islands in the Maldives and the Pacific Ocean, thought to be among the most vulnerable parts of the planet as the climate changes. Over the coming two months, it will be subjected to varying wave and sea-level conditions, with its response being intensely monitored using wave sensors, current meters, video cameras and laser scanners. Researchers hope the experiment, combined with fieldwork and numerical modelling, will give them an indication of precisely how the islands might respond if sea levels and the frequency of extreme weather events continue to increase. The experiment forms part of the ARISE project, a five-year £2.8million project led by the University of Plymouth and funded through UK Research and Innovation’s Horizon Europe Guarantee programme. With partners across the world, including organisations in the Maldives and the Pacific, the project is exploring the potential for the world’s low-lying coral atoll islands to survive predicted rises in sea level through natural flooding processes. Professor Gerd Masselink, Professor of Coastal Geomorphology at the University of Plymouth and lead of the ARISE project, said: “ It is virtually impossible to record waves washing over a real atoll island, because the chances of an extreme event occurring on an instrumented island is very rare – you’d have to be instrumenting at least tens of islands spread across the Maldives and the Pacific to ‘catch’ it. This scale model will give us the opportunity to run a controlled series of scenarios and monitor with a range of instruments how the island might respond in a variety of present and future sea conditions. Combined with other measurements from the field, we hope it will give us a clear understanding of if – and how – these communities can survive in future. ” DELFT - Deltares. Koraal tests in de Deltagoot The experiment is a collaboration between the University of Plymouth, Delft University of Technology, and Deltares. It will take place in the Deltares’ Delta Flume, the world’s largest wave flume. Measuring 300m long, 9m deep and 5m wide, and with the ability to generate waves up to 2m high, the flume is the perfect place for this particular experiment. It will also enable the researchers to evaluate the impact of artificial reef structures in reducing the energy of the waves reaching the island shoreline. Such structures are increasingly being used as eco-friendly coastal defences that provide habitats for marine life as well as protecting island shorelines. Dr Marion Tissier, Assistant Professor of Coastal Waves at Delft University of Technology, said: “ Coral reefs naturally protect atoll islands from wave-driven flooding, but unfortunately, they are degrading worldwide. This experiment provides a unique opportunity to investigate the efficiency of reef restoration for coastal protection. Up to 150 eco-friendly, complex-shaped artificial reef structures will be installed on the reef of the scale model, and their effect on the waves will be systematically analysed. The large scale of this experiment is essential, as it allows us to get a realistic picture of how water moves through these complex structures, and thus of how the structures influence the wave field and ultimately flooding at the island. ” Marion Tissier of TU Delft is leading the ‘Coral reef RESToration to reduce island flooding’ (CREST) project. This project is embedded into the experimental program ARISE, led by the University of Plymouth. CREST is funded by the Top consortium Knowledge and Innovation (TKI) Delta Technology. In this project she works together with Deltares, Boskalis and the reef 3D printing startup Coastruction. Read the news article about CREST DELFT - Deltares. Koraal tests in de Deltagoot. Suzanna Zwanenburg, project leader of the Deltares Delta Flume, added: “ We have built a scale model of a reef platform with an atoll island in the Deltares Delta Flume. With this unique, experimental facility, we can generate the largest artificial waves in the world, which makes it the perfect place to assess the effect of waves washing over an atoll island. The model is equipped with numerous sensors, which gives us detailed information about the wave heights, velocities and pressures along the reef platform and the overwash over the atoll island. ” The new experiment is being launched weeks after scientists returned from the Maldives, where they deployed more than 80 individual instruments on the island of Dighelaabadhoo as they seek to capture in-depth information about the energetic wave conditions during southwest monsoon season in the Indian Ocean. The measurements generated by the instrumentation will constitute the largest field campaign ever to be staged on an atoll island, and the instruments will remain deployed until August.

SURF Education awards 2023

This year, the SURF Education Awards were presented again, to three professionals who have made a major contribution to IT innovation in Dutch education. Quite rightly, Leon Sprooten (VISTA College), Timon Idema (TU Delft) and Diana Molenschot (Thomas More University of applied sciences) received the SURF Education Awards 2023 . Timon was one of the first to recognize the importance of open educational resources and to put this into practice. In 2018, he published his first open textbook for the Nanobiology program (TU Delft & Erasmus University). With the support of a grant from the SURF incentive scheme, Timon, with the help of colleagues, subsequently developed a series of open educational materials for the Bachelor's and Master's programs in Nanobiology. But it didn’t stop there. Timon also made a significant contribution to the development of a publishing service for open textbooks. Through this service at TU Delft, instructors can publish their own open educational literature using Jupyter Books. The catalog now includes more than thirty open textbooks, both classic and interactive. Under Timon’s leadership, extensive manuals, examples, and templates have been published, enabling anyone to create their own interactive open textbooks with Jupyter Books. Since 2020, Timon has been the program director of the Master’s program in Nanobiology. Colleagues say: "Timon is a shining example of an educator who encourages teachers to innovate their educational materials and share them openly. He understands that educators value tools developed by those who are teachers themselves. Additionally, he actively involves both teachers and students in his projects. Everything he develops is presented to colleagues and students, for example, in workshops or conference presentations. This way, he receives valuable feedback that helps him better align the results with the needs of his target audience, ensuring that both teachers and students find it valuable for their work or studies."

Results of initiatives on fossil industry cooperation

TU Delft is committed to supporting the energy transition and seeks to collaborate with partners who endorse this mission. The question how cooperation with the fossil fuel industry contributes to the energy transition is a topic of significant interest both within and outside the university. Last autumn, TU Delft introduced three initiatives which give students and staff the opportunity to actively contribute to this discussion. These initiatives included an online consultation, open dialogue sessions, and a moral deliberation chamber. The TU Delft community responded in large numbers to this invitation. It resulted in four recommendations that the university will be acting upon. These recommendations are summarised below. 1. Be transparent about collaboration All three initiatives revealed a strong desire within TU Delft for transparency about collaborations with the fossil fuel industry. This includes transparency about collaborations and the motivations behind them. In the online consultation, 80% of the nearly 3,000 participants chose to endorse full transparency. It was the most popular measure. 2. Foster and strengthen an open discussion culture The dialogues and meetings of the moral deliberation chamber took place in an open atmosphere and demonstrated that it is possible to have a constructive, substantive conversation in such a setting. There was a desire among participants for more dialogue on this topic. Recent findings from the Inspectorate of Education on social safety also confirm that TU Delft would do well to continue building an open discussion culture. The three initiatives, or variations thereof, can be useful tools in this regard. 3. Set conditions for collaboration with the fossil fuel industry The three initiatives revealed differing opinions on whether collaboration with the fossil fuel industry can help accelerate the energy transition. A majority of participants in the consultation chose to set conditions for collaboration (76%) – either for the partner (54%) or for the collaboration itself (58%). There was no widespread signal given to not enter into new collaborations or stop current ones. 4. Determine TU Delft's role in the energy transition 94% of the participants in the online consultation believe that TU Delft has an important role to play in the energy transition. However, what exactly this role entails and how we want to fulfil it is not yet sufficiently clear. Therefore, the conversation on this topic will continue. What is the ambition of TU Delft, and what responsibilities lie with scientists, other staff members, students, and administrators? How do we translate new insights into action? Can we find new ways to combine our strengths with other universities? The Executive Board of TU Delft adopted these recommendations. The Executive Board has given the green light to develop, among other things, a framework for new collaborations with the fossil fuel industry. A core team specifically established for this purpose will take on this task. More information Below you find the information on which the recommendations are based. ​​​​​​​Advice to the Executive Board on collaboration with the fossil fuel industry Management summary open deliberation chamber Results of the online consultation Report on the open dialogues

Revealing coastal sediment pathways

Stuart Pearson, coastal engineer at TU Delft, receives a NWO Veni grant to investigate sediment pathways. He will specifically focus on tracking individual sand grains. Revealing the interconnected network of sediment pathways that shape our coast will help us to better manage the sediment that builds ecosystems and protects us against flooding. Dunes are important barriers to protect The Netherlands from flooding. To maintain the coastline and its sandy protectors, coastal engineers try to understand the natural system. This way they can better plan effective future coastal adaptations. S.G. (Stuart) Pearson S.G.Pearson@tudelft.nl Chaos The coast is constantly on the move. Sand is chronically being eroded and then accumulated elsewhere. But where? Stuart Pearson is zooming in to an unprecedented scale and wants to find out which paths specific grains of sand follow between different places on the coast. It is extremely challenging to track the grains, and not only because they all look the same. Sediment transport is influenced by waves and currents and moves in all directions. “It looks like one big chaotic mess”, Pearson says. “I consider coasts as an interconnected network of sediment pathways, like a subway map showing how stations are linked. This connectivity reveals the hidden structure underlying chaotic sediment pathways.” Coloured sand in a big pool To discover these pathways, Pearson will start to work on an experiment in a laboratory beach. Since it is nearly impossible to distinguish individual grains, he came up with a colourful idea. In a wave basin the size of an Olympic swimming pool at Deltares, he will construct a beach divided into areas with different colours of sand. “I developed a technique to create a dataset of the grains’ movements. Cameras will follow the basin from above and identify where the different colours end up, and especially via which path they arrive there.” Validating numerical models During his PhD, Pearson worked on a field experiment where he tracked fluorescent green sand at the Wadden islands. “Measuring sand paths in the wild is very difficult”, he explains. “I was able to see where some of the green sand went, but that only tells us about a small part of the coastal system. I want to understand the pathways between every part of the system, and we can only do that in the lab.” Pearson developed numerical models to investigate plausible pathways. He is looking forward to the new opportunities coming on his own path with this grant. “I hope to prove with new lab experiments that the model is physically representing the right processes. And next to that, I hope that other researchers can validate their models of sediment transport through my dataset.”

Reimagining river cities: The University of São Paulo, TU Delft and Resilient Delta enter 5-year partnership

This April, the University of São Paulo and TU Delft launched a 5-year joint research project on river cities and ports, focusing on the intersections between climate action and health the urban environment The Tietê river makes its start in foothills immediate east of São Paulo, flowing through this expansive metropolis through a series of waterways. Eventually these waters coalesce with the Paraná river, forming an expansive transnational river delta that enters the Atlantic Ocean near Buenos Aires, Argentina. According to Prof. Alexandre Delihaicov, the culture of design for river cities emphasizes the architecture of place, the multiple dimension of water and its civic character, where rivers serve as structuring elements in urban and regional design. Viewing the hydrographic basin as a unit for planning and intersectoral management and governance in public administration transforms the approach to infrastructure and city development. Delihaicov leads the “Laboratório de Projetos” (Design Lab) and the “Architecture Design of Fluvial Urban Infrastructures - Grupo Metrópole Fluvial” at the Faculty of Architecture and Urbansim at the University of São Paulo, which has conducted extensive research-by-design projects on several aspects of urban water, the environment, and liveability in the region. Many of the timely and complex challenges facing this vital urban water system—and its connections throughout South America—resonate with those found here in the Rhine-Meuse-Scheldt delta in Northwest Europe, which culminates in the highly urbanized Greater Rotterdam region. The scale and urgency of these challenges was underscored by historic floods in the state of Rio Grade do Sul in recent weeks. In addition to substantial loss of life, hundreds of thousands have been displaced from their homes, and large parts of cities including Porto Alegre remain underwater. Many communities may be permanently displaced by the events. According to Dr. Taneha K. Bacchin, there is an urgent need for a paradigm shift in urban and regional development, one that is more sensitive and responsive to the unfolding state of criticality, socio-environmental vulnerability, and risk. Bacchin has been invited to join multiple local, state and national crisis management and reconstruction projects in the wake of the events. As an Associate Professor of Urbanism at TU Delft, Bacchin also has extensive academic leadership experience in major research initiatives like Water4Change and Redesigning Deltas . Shared recognition of the need for action and cooperation motivates this five year joint research program, “Network of river port cities: Design at the intersection of climate action and urban-environmental health”. The cooperation focuses on the interrelations among six key areas: water, energy transition, nature-based economy, hybrid green-blue infrastructure, transport infrastructure and mobility, health and wellbeing in the built environment. The exchange will facilitate peer-to-peer learning within the larger geographic context of highly dynamic landwater regions, as Deltas, offering global perspectives and regenerative insights. The international and transdisciplinary cooperation builds on a long history of cooperation between the University of São Paulo and TU Delft , including a visit by the Rector of USP to TU Delft in February 2024. It is also the first joint collaboration to also include as partner the Resilient Delta Initiative. “By expanding this relationship to include Erasmus University Rotterdam and other key stakeholders through the Resilient Delta initiative, we can tap new opportunities to speed up our learning, innovation, and intervention,” says Arjan van Timmeren, Scientific Director of RDi. “This program brings fantastic opportunites to strengthen how our universities work together and with key stakeholders in our home cities and regions.” The program connects researchers and practitioners around five research domains and twinned real-world cases. Innovations in water-based mobility, solutions for safe living in climate-vulnerable areas, and strategies for weaving ecological awarness into everyday urban life are among the focuses of the program. The contours of the partnership were sketched out over the course of a three-day seminar in São Paulo in April 2024. This included reflections on current and ongoing transdisciplinary research programs in Brazil and the Netherlands. More than fifty delegates participated in joint presentations hosted by the Municipality of São Paulo, which aims to feed a new Waterway Plan for São Paulo through research-by-design projects. Pedro Martin Fernandes, President of São Paulo Urbanismo, underscored the city’s aspirations for its water infrastructure: “We need to change the city’s relationship with water. Through the transformation and creation of public spaces, we want to change people’s view of this resource.” Resilient Delta will help to resource and co-design the cooperation process, leveraging insights from a growing team of ‘gluon’ knowledge integration experts and insights from ongoing urban and regional collaborations like the Maasterras redevelopment . “This will be particular important for securing successful joint working across science and practice, but also within and between our two urban regions,” says Zac Taylor, Academic Lead for Deltas at RDi. “The complexity and urgency of the assignment before us demands novel approaches to creating knowledge for action. With these creative approaches, we can and must learn to speed up our learning and action between science and practice, and between our two regions.”