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Storm surge propagation in Galveston Bay during hurricane Ike
Study of Hurricane Ikes storm surge along the Texas-Louisiana coast using the fully nonlinear Finite-Volume Coastal Ocean Model (FVCOM) with a high-resolution unstructured mesh. .
Levee failure due to piping : a full-scale experiment
Piping is considered as an important failure mechanism for water retainingstructures in the Netherlands. A recently performed study on the safety of Dutchlevees raised some doubts with respect to the validity of the current calculation model.A large research program has therefore been started to investigate the process of piping in more detail.
OpenEarth : inter-company management of data, models, tools and knowledge
Load distribution on the geosynthetic reinforcement within a piled embankment
This paper considers the load distribution on the geosynthetic reinforcement (GR) in an embankment support with piles. The paper describes the test set-up and test procedure of a test series of twelve 3D piled embankment tests. The measured strains show that the tensile forces concentrate within the GR strips between adjacent piles. The measured shape of a deformed GR strip shows that its net load must have been an approximately inverse triangular-shaped load. This means that most of the load worked on the GR part close to the piles. This differs from the assumptions for the load on the GR strips in BS8006 (2010, equally distributed load) and EBGEO (triangular shaped load). When assuming an inverse triangular load in stead of a triangular load, a saving of 15 to 25 % of the required GR strength will be gained for a realistic geometry of a piled embankment.
(Im)mobilization of organic pollutants by soil constituents in the soil/ground water system : strategies for innovative management
Understanding and managing the morphology of Rhine delta branches incising into sand-clay deposits
In the Rhine-Meuse delta the morphology of the river branches is highly dependent on the erodibility of the subsoil. In this study is shown how the geological information can be used to create 3D maps of the erodibility of the sub-soil, and how this information can be used to schematize the sub-soil in computational models for morphological simulations. Local incisement of sand patches between areas with poorly erodible bed causes deep scour holes, hence increasing the risk on river-bank instability (flow slides) and damage to constructions. Different types of mathematical models, ranging from 1D (SOBEK) to quasi-3D (Delft3D) have been applied to study the future development of the river bed and possible management options.
Active wave absorption system arch
Effects of climate change on coastal groundwater systems : a modeling study in the Netherlands
Climate change in combination with increased anthropogenic activities will affect coastal groundwater systems throughout the world. In this paper, we focus on a coastal groundwater system that is already threatened by a relatively high seawater level: the low-lying Dutch Delta. Our findings on hydrogeological effects can be scaled up since the problems the Dutch face now will very likely be the problems encountered in other delta areas in the future. We calculated the possible impacts of future sea level rise, land subsidence, changes in recharge, autonomous salinization, and the effects of two mitigation countermeasures with a three-dimensional numerical model for variable density groundwater flow and coupled solute transport. We considered the effects on hydraulic heads, seepage fluxes, salt loads to surface waters, and changes in fresh groundwater resources as a function of time and for seven scenarios.
Sustainable development of nourished shorelines : innovations in project design and realisation
Recent years have shown an ongoing need for marine infrastructure, however the development of large-scale infrastructure projects is associated with uncertainties and delays, increased awareness ofthe environmental effects and extensive demands on environmental management plans and monitoring programs.
Versterkte baggerspecie, een nieuwe innovatieve bouwstof
Dit artikel beschrijft hoe de bouwstof wordt gemaakt, gaat in op reeds verricht onderzoek en G11geeft een doorkijk naar aankomende pilot-projecten.