3805 resultaten

  • Effect of surge uncertainty on probabilistically computed dune erosion

    Auteurs: Roscoe, K.L.; Diermanse, F.L.M. (2011)

  • Estuary schematisation in behaviour-oriented modelling

    Auteurs: Rossington, S.K.; Nicholls, R.J.; Stive, M.J.F.; Wang, Z.B. (2011)

    ASMITA (Aggregated Scale Morphological Interaction between Tidal basin and the Adjacent coast) is a behaviour-oriented modelling approach which represents estuarine systems schematically. The results in this paper demonstrate a possible generic methodology to test different schematisations using simple models to characterise estuarine morphodynamics as a preliminary stage of estuary assessment.

  • Flood hazard maps in coastal areas

    Auteurs: Boers, M.; Diermanse, F.L.M.; Dongeren, A.R. van (2011)

    This paper describes a methodology for flood hazard maps in coastal areas with dunes. This methodology is applicable for situations where dune erosion and flooding after breaching of a dune row are the important flood hazards that endanger people, buildings and infrastructure. The methodology has been applied for thirteen coastal towns in The Netherlands.

  • Local deepening of large shallow peat lakes : a measure to improve their ecological status

    Auteurs: Penning, W.E.; Uittenbogaard, R.E.; Ouboter, M.R.L.; Donk, E. van (2010)
    Gepubliceerd in: Journal of limnology, volume 69 (2010) nummer 1, pagina 126-137

  • Mixed alluvial and non-alluvial bed topographies : observations, modeling and implications

    Auteur: Sloff, C.J. (2010)

    The presence of mixed alluvial and non-alluvial beds in rivers (for example exposed bedrock, clay layers, riprap or armored beds) highly influences the river orphological behavior and river functions. In many situations these non-alluvial sections only cover a limited area of the river bed (therefore interact closely with the rounding alluvial beds), or have a temporal character (e.g., remobilize during high flows). More detailed monitoring techniques, and new modeling approaches that are deploy.

  • Evaluation of an extended operational boussinesq-type wave model for calculating low-frequency waves in intermediate depths

    Auteurs: Jong, M.P.C. de; Borsboom, M.J.A.; Bont, J.A.M. de; Vossen, B. van (2011)

    As part of the Joint Industry Project Hawai, the operational Boussinesq-type wave model of Deltares, TRITON, was used to investigate whether this type of wave models could predict bound low-frequency waves (setdown waves) at intermediate depths.

  • Intrinsic steady alternate bars in alluvial channels, part 1 : experimental observations and numerical tests

    Auteurs: Crosato, A.; Desta, F.B. (2009)

  • Simulation of subaqueous dunes using detailed hydrodynamics

    Auteurs: Nabi, M.; Vriend, H.J. de; Mosselman, E.; Sloff, C.J.; Shimizu, Y. (2009)

    We are developing a numerical model for simulating the development and migration of dunesin rivers in 3D case. The numerical model consists of three modules: turbulent flow, sediment transport andmorphology.

  • A retrospective analysis to explore the applicability of fish biomarkers and sediment bioassays along contaminated salinity transects

    Auteurs: Schipper, C.A.; Vethaak, A.D. (2009)
    Gepubliceerd in: ICES journal of marine science, volume 66 (2009) nummer 10, pagina 2089-2105

     Biological-effects monitoring in estuarine environments is complex as a result of strong gradients and fluctuations in salinity and other environmental conditions, which may influence contaminant bioavailability and the physiology and metabolism of the organisms. To select the most robust and reliable biological-effect methods for monitoring and assessment programmes, a large-scale field study was conducted in two estuarine transects in the Netherlands.

  • The influence of changes in tidal asymmetry on residual sediment transport in the Western Scheldt

    Auteurs: Bolle, A.; Wang, Z.B.; Ronde, J.G. de (2010)
    Gepubliceerd in: Continental shelf research, volume 30 (2010), pagina 871-882

    This study fits into a wide rresearch program from Rijkswaterstaat, RIKZ concerning the exchange of sediment between the coast and the tidal basins, Western Scheldt and WaddenSea, which are the largest basins along the Dutch Coast, over different time-scales.

307308Page 309 of Array309310311