Publications

4209 results

  • Linking habitat suitability and seed dispersal models in order to the effectiveness of hydrological fen restoration strategies

    Authors: Loon, A.H. van; Bierkens, M.F.P.; Griffioen, J. (2011)

     A model is constructed that adresses seed dispersal in tens, in order to investigate restoration strategies.

  • Adapting soil properties by pore space engineering

    Authors: Harkes, M.P.; Star, W.R.L. van der; Rozing, A.P.C.; Meurs, G.A.M. van (2010)

  • The ability of a GCM-forced hydrological model to reproduce global discharge variability

    Authors: Sperna Weiland, F.C.; Kwadijk, J.C.J.; Bierkens, M.F.P. (2010)
    Published in: Hydrology and earth system sciences, volume 14 (2010), page 1595-1621

    In this study the usefulness ofGCM data for hydrological studies, with focus on discharge variability and extremes, was tested by using bias-corrected daily climate data of the 20CM3 control experiment from a selection of twelve GCMs as input to the global hydrological model PCR-GLOBWB.

  • Bed-load transport in obliquely dune-covered riverbeds

    Authors: Sieben, J.; Talmon, A.M. (2011)
    Published in: Journal of hydraulic research, volume 49 (2011) issue 3, page 317-324

    In rivers, dune crest patterns are not always perpendicular to the main flow direction, because deviations up to around 20 degrees have been observed. These can affect the direction of sediment transport, but the available predictors for models do not account for this effect. Therefore, laboratory tests on sediment transport over artificial dunes oblique to the flow direction were conducted. The largest effect is due to helical flow at the lee side of a dune and from flow near the reattachment point. These three-dimensional features are lumped into a preliminary predictor to account for the direction of bed-load in models for two-dimensional river morphology with depth-averaged flow. To include dynamic bed-form orientation, an additional model for bed-form orientation is proposed. These concepts require further validation with mobile-bed observations and subsequent tests with numerical simulations.

  • Perceived effectiveness of environmental decision support systems in participatory planning : evidence from small groups of end-users

    Authors: Inman, D.; Blind, M.W. (2010)
    Published in: Environmental modelling and software, volume 26 (2010) issue 3, page 302-309

  • The Dutch design guideline for piled embankment

    Author: Eekelen, S.J.M. van (2010)

  • Simple physics-based predictor for the number of river bars and the transition between meandering and braiding

    Authors: Crosato, A.; Mosselman, E. (2009)

    The classical approachdefines separators between ranges in which river planform styles with certain numbers ofbars are linearly stable and linearly unstable.

  • Morphodynamic upscaling with the MORFAC approach : dependencies and sensitivities

    Authors: Ranasinghe, R.; Swinkels, C.M.; Luijendijk, A.P.; Roelvink, J.A.; Walstra, D.J.R. (2011)
    Published in: Coastal engineering : an international journal for coastal, harbour and offshore engineers, volume 58 (2011) issue 8, page 806-811

    The recently developed Morphological Acceleration Factor (MORFAC) approach for morphodynamic upscaling enables numerical model simulations of coastal evolution at decadal to millennial time scales. However, the general validity of the MORFAC concept for coastal applications has not yet been comprehensively investigated. This communication presents some initial results of an ongoing study that attempts to rigorously and methodically investigate the limitations and stregths of this approach.

  • Variatie in achtergrondbelasting van fosfaat op oppervlaktewater in een polder

    Authors: Griffioen, J.; Louw, P.G.B. de (2010)
    Published in: H2O : tijdschrift voor drinkwatervoorziening en afvalwaterbehandeling, volume 43 (2010) issue 7, page 35-38

    Regionale en landelijke studies besteden al geruime tijd aandacht aan diffuse achtergrondbelasting, waarbij verondersteld wordt dat sprake is van een uniforme belasting van het oppervlaktewatersysteem. Het is echter bekend dat kwel niet ruimtelijk uniform is. De kwelintensiteit in polders hangt sterk af van de doorlatendheid van de deklaag die op lokale schaal zeer variabel kan zijn door de aanwezigheid van zandbanen en wellen met kortstluitstroming tussen het eerste watervoerende pakket en het oppervlak. De vraag doet zich vervolgens voor wat de invloed hiervan is op de fosfaatbelasting. Daarom is een veldstudie verricht naar de hydrogeologische en -geochemische controles op de achtergrondbelasting voor een diepe polder.

  • Wateroverlast en onzekerheid : een integraal perspectief

    Authors: Riel, W.A.P. van; Tollenaar, D.; Ven, F.H.M. van de (2011)
    Published in: H2O : tijdschrift voor drinkwatervoorziening en afvalwaterbehandeling, volume 44 (2011) issue 13, page 39-42

    Het optreden van water-op-straat wordt in Nederland berekend met rioleringsmodellen om bestuurders of beheerders te assisteren in besluitvorming, wat betreft maatregelen ter reductie van regenwateroverlast. Het is daarom belangrijk resultaten van rioleringsmodellen te vertalen naar voor bestuurders en beheers relevante informatie. De onzekerheid in deze vertaling van water-op-straat naar schaderisico's is zo groot dat deze informatie voor bestuurders wellicht beperkt bruikbaar is.

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