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Litter forecasting for the Rio Olympics
Deltares has contributed to the clean-up efforts in Guanabara Bay, Rio de Janeiro, prior to the 2016 Olympics. The operational forecasting system was handed over to the state authorities in March 2015.The large bay is severely affected by floating litter and this system allows the eco-boats clearing the waste to be more effective.
Levelling in the new IJmuiden lock, the Netherlands
The largest lock in the world will be built at IJmuiden to provide access to the harbour of Amsterdam for larger seagoing vessels. Deltares carried out extensive hydraulic research for the reference design of the levelling system using a 1:40 scale model. The results of the scale-model study and validated numerical simulations resulted in requirements for levelling times.
Lessons from full scale flow slides
There was a large flow slide on the southern edge of the Walsoorden tidal flat in July 2014 during which 850,000 m3 of sediment was deposited in the adjacent navigation channel. Detailed and frequent bathymetry measurements of this flow slide and several smaller induced flow slides produced a unique database of the geomorphodynamic recovery of the system after a large sudden change in the channel-shoal interface.
Marismas Nacionales scoping study : contribution
The Marismas Nacionales, Mexico, is an expansive set of coastal and riverine wetlands and associated communities and farmlands. Its mangroves encompass well over 100,000 hectares of mature and productive mangrove forest. With increasing pressures, the Marismas Nacionales region would benefit from an overarching plan that aims for integrated sustainable use of natural capital while optimizing water use, fisheries and agriculture practices to improve human wellbeing, alleviate poverty, support livelihoods, and conserve ecosystems. Forest Trends has requested Deltares to contribute to a scoping study that focusses on the information needs to support a master planning process aimed at the restoration and conservation of Marismas Nacionales unique values as well as to support future decision making towards its sustainable use. This report distinguishes three steps: 1. Initial reflection on information needs to develop an integrated model ; 2. Follow-up search for altitude and bathymetry data and outline options for a hydrological/hydrodynamic model as basis for a decision support system ; 3. Description of an integrated approach to the master planning process.
Impacts of groundwater conservation on vegetation patterns
One of the tasks of regional water managers is to configure the spatial arrangement of landscape elements in stream valley catchments while optimising biodiversity in the context of a range of scenarios involving climate change and climate adaptation measures. To help them perform this task, a range of effects of groundwater conservation measures were determined by combining greenhouse experiments, database analyses, field work and a new hydrology-vegetation modelling approach. The project focused on a stream valley catchment in the south-east of the Netherlands, the Tungelroyse Beek. The results show that an interdisciplinary model approach is essential to develop climate-robust plans for nature management.
Impact of extreme weather on the Port of Rotterdam
Rainfall, sea levels and storms in the Netherlands are expected to become more extreme, affecting operations in the Port of Rotterdam and its transport connections to the hinterland. CIrcle is an interactive touch-table application used to support risk assessment relating to the impact of extreme weather events and to visualise cascade effects. Extreme weather is expected to have most impact on market position, safety and cost.
Greening flood protection in the Netherlands
The dominant paradigm of ‘building hard structures’ in flood risk management is being challenged by approaches that integrate ecosystem dynamics and are ‘nature-based’. In Greening Flood Protection (GFP) approaches of this kind, natural dynamics contribute to flood risk management, the ecosystem is enhanced, and nature and flood protection are combined. The central focus of the doctorate research that is described here, is on how knowledge about GFP decision-making enables and constrains GFP.
GRADE method for discharge scenarios
In 2014, the Netherlands Meteorological Institute KNMI presented four new climate scenarios for the Netherlands and for the river basins of the Rhine and Meuse for the time horizons 2050 and 2085. Deltares estimated the impact of these climate scenarios on the extreme discharges of the Rhine and Meuse. The GRADE Generator of Rainfall and Discharge Extremes was used to calculate the distribution of high discharges in the Rhine at Lobith and the Meuse at Borgharen.
Geological model for earthquake studies in Groningen
Deltares contributed to the study programme of the NAM by building a geological model of the subsurface of Groningen. This geological model is used as input for site amplification calculations that are part of the Ground Motion Prediction Equation for Groningen.
Flexible Mesh Morphodynamic Modelling
The two-dimensional morphology included in Delft3D 4 was successfully translated to Delft3D Flexible Mesh in 2015. The biggest challenges related to the effect of secondary flow and gravitational pull on the morphology. Furthermore, grid-independent input can be specified in a format similar to Delft3D 4 and output can be visualised in Quickplot.