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Vegetation modelling to assess the development and performance of nature-based flood defences
The assessment of the performance and development of nature-based flood defences and natural/semi-natural systems requires efficient quantitative tools. Drawing on experience with these systems and software, we developed an open source tool for biophysical modelling based on Python, Delft Flexible Mesh and XBeach.
Widely supported guidelines for nature-based solutions in flood risk management
In collaboration with over twenty-five international institutions, Deltares developed guidelines for the effective implementation of nature-based solutions for flood risk management. The guidelines highlight process steps and principles that aim to optimise projects for the reduction of flood risks by introducing nature-based elements. The guidelines will be tested in practice in next year by both bilateral donors and international organisations.
Hurricane Irma : impact-based forecasting put to the test
Deltares is working on new capabilities for impact-based forecasting, one of the requirements of the Sustainable Development Goals of the United Nations. We can now forecast water levels on coasts and discharges for rivers all over the world, but are we ready to warn people on the basis of the impacts on vital infrastructure? We conducted a real-time experiment to find out.
BASE Platform : portal for satellite-derived bathymetry
BASE Platform provides satellite-derived bathymetry data on a global scale using tidal modelling and crowdsourced data collection techniques to enhance accuracy. The main products are optical, SAR and altimeter bathymetry. Data are merged with crowdsourced bathymetry. Tidal information is provided via the Global Tide and Surge Model (GTSM).
Ecosystem-based adaptation using Building with Nature : towards resilient coasts in Indonesia
This project involves the restoration of tropical muddy mangrove coasts linking up coasts and catchments and work on technical coastal measures in combination with alternative livelihoods, with strong support from local communities.
Tubifex worms improve densification rates and the strengthening of soft sediments and mine tailings
Laboratory tests on oil-sand fluid fine tailings proved that Tubifex worms improve densification by up to 60%. This nature-based technology represents a potential alternative to chemical additives such as flocculants. The potential applications of Tubifex augmentation include tailings basin closure, land reclamation and flood defence projects.
The interplay between rivers and riparian vegetation
To study the development of river landscapes as a result of plant-river interaction, a new model was developed that included dynamic interactions between river hydro-morphodynamics and riparian vegetation. This model was used to study the effects of invasive species, climate change, dam construction and river restoration on riparian vegetation patterns, river morphology and habitats of fluvial species.
Salt intrusion and temperature dynamics in San Fransisco Bay
Deltares and USGS developed and validated a Delft3D Flexible Mesh model for the San Francisco Bay-Delta System. The large amounts of data available allowed for a detailed calibration of water levels, velocities and flows. The community model structure enhances third-party involvement and the continuous development of the model.
Ecological modelling for the environmental impact assessment of sand extraction in the North Sea
Deltares provided support for an Environmental Impact Assessment procedure for two large-scale sand extraction initiatives. We conducted an innovative model study to explore the possible effects of increased fine sediment concentrations in the North Sea and the Wadden Sea.
The iFlow model : a simplified model for the study of complex estuarine sediment transport
The iFlow model is an idealised, width-averaged model for the simulation of suspended sediment transport in estuaries. The focus is on assessing the risk of a transition to high sediment concentrations (hyperturbidity) in the Scheldt of the kind seen in the Ems.