3805 resultaten

  • Current and future CO2 emissions from drained peatlands in Southeast Asia

    Auteurs: Hooijer, A.; Kwadijk, J.C.J. (2010)
    Gepubliceerd in: Biogeosciences, volume 7 (2010) nummer 5, pagina 1505-1514

    In this paper we present the first geographically comprehensiveanalysis of CO2 emission from the decompositionof organic matter from drained peatlands in Southeast Asiawith particular reference to lowland peatlands in Indonesia,Malaysia, Papua New Guinea and Brunei.

  • Regression models and uncertainty analysis of coastal state indicators

    Auteurs: Brière, C.D.E.; Boogaard, H.F.P. van den (2009)

    Int. Conf. Coastal Eng., Germany.

  • Variability in transport of fish eggs and larvae (I) : modelling the effects of coastal reclamation

    Auteurs: Erftemeijer, P.L.A.; Beek, J.K.L. van; Bolle, L.J.; Dickey-Collas, M.; Los, H.F.J. (2009)
    Gepubliceerd in: Marine ecology progress series (MEPS), volume 390 (2009), pagina 167-181

    Dispersal of eggs and larvae of herring, plaice and sole in the southern North Sea was studied by modelling using real-time hydrodynamic forcing (with wind, air pressure and river discharge) and species-specific knowledge of larval behaviour (incorporating salinity triggers), temperature-dependent growth and spawning characteristics. Larval transport was simulated using a finitevolume advection-diffusion model (Delft3D-WAQ) coupled to a 3-dimensional hydrodynamic model (Delft3D-FLOW). Model parameter settings were refined following a sensitivity analysis. Validation of modelled hydrodynamics and larval distribution patterns showed broad agreement with field data. Differences in model results for larval distribution, transport success and timing of arrival at nursery grounds between baseline conditions and a scenario that incorporated a proposed 1000 ha coastal reclamation (protruding 6 to 7 km from the Dutch coastline) for the expansion of the Port of Rotterdam (Maasvlakte-2) were insignificant in comparison to the interannual variability in larval dispersal for these species. Results suggest that effects of the proposed coastal reclamation on the transport success of fish larvae (flatfish and herring), an issue over which public stakeholders had expressed concern, will be negligible.

  • Is the jury still out? : toward greater insight in policy learning in participatory decision processes : the case of Dutch citizens' juries on water management in the Rhine Basin

    Auteurs: Huitema, D.; Cornelisse, C.; Ottow, B.T. (2010)
    Gepubliceerd in: Ecology and society, volume 15 (2010) nummer 1, pagina 1-19 (paper 16)

    This article discusses the potential for policy learning offered by participatory processes, specifically so-called citizens' juries. We establish the need for policy learning by pointing to the increased complexity of water management tasks and challenges. A conceptual discussion subsequently distinguishes between cognitive, normative, and relational learning. The public participation literature suggests that participatory processes will contribute to various forms of learning. We assess the truth of this assumption on the basis of three case studies: citizens' juries on water management in the Dutch part of Rhine basin. We analyze whether the three forms of learning have occurred among jurors, and among policy makers. We find high levels of cognitive, normative, and relational levels of learning for the jurors, but relatively low levels of learning for policy makers. We analyze the reason for this divergence.

  • Predicting the consequences of nutrient reduction on the eutrophication status of the North Sea

    Auteurs: Lenhart, H.; Blaas, M.; Desmit, X.; Los, F.J.; Villars, M.T. (2010)
    Gepubliceerd in: Journal of marine systems, volume 81 (2010) nummer 1-2, pagina 148-170

    This paper presents results from the OSPAR Intersessional Correspondence Group on Eutrophication Modelling (Lowestoft in 2007). Results of North Sea ecosystems models under different nutrient reduction scenarios are compared.

  • Avulsion in action : reconstruction and modelling sedimentation pace and upstream flood water levels following a medieval tidal-river diversion catastrophe (Biesbosch, the Netherlands, 1421-1750 AD)

    Auteurs: Kleinhans, M.G.; Weerts, H.J.T.; Cohen, K.M. (2010)

  • Climate change will affect the Asian water towers

    Auteurs: Immerzeel, W.W.; Beek, L.P.H. van; Bierkens, M.F.P. (2010)
    Gepubliceerd in: Science, volume 328 (2010), pagina 1382-1385

  • Quantitative precipitation forecasts and early flood warning: the Hunter Valley flood of June 2007

    Auteurs: Weerts, A.H.; Gouweleeuw, B.T.; Leahy, C.P. (2009)

    Traditionally, flood forecasting and warning systems are a customized user interface around hydrological and hydraulic models. While this model centric approach may represent a system perfectly able to provide forecasts using the model and data it was designed for, it offers disadvantages in the perspective of chaning model and data requirements (Werner et al., 2009).

  • QSPRs for the estimation of subcooled liquid vapor pressure of polycyclic aromatic hydrocarbons, and of polychlorinated benzenes, biphenyls, dibenzo-p-dioxins, and dibenzofurans at environmentally relevant temperatures

    Auteur: Noort, P.C.M. van (2009)

    Chemosphere, Vol 77 (2009), pp. 848 - 853.

  • Modelling storm impacts on beaches, dunes and barrier islands

    Auteurs: Roelvink, J.A.; Dongeren, A.R. van; Thiel de Vries, J.S.M. van; McCall, R.T.; Lescinski, J. (2009)

    A new nearshore numerical model approach to assess the natural coastal response during time-varyingstorm and hurricane conditions, including dune erosion, overwash and breaching, is validated with a seriesof analytical, laboratory and field test cases.

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