3805 resultaten

  • Modelling the new soil improvement method biogrout : extension to 3D

    Auteurs: Wijngaarden, W.K. van; Vermolen, F.J.; Meurs, G.A.M. van; Vuik, C. (2009)
    Gepubliceerd in: Proceedings of the 8th European Conference on Numerical Mathematics and Advanced Applications - ENUMATH 2009 (Uppsala, July 2009) (2010), pagina 893-900

    Biogrout is a new soil improvement method based on microbial inducedcarbonate precipitation. Bacteria and reactants are flushed through the soil, resultingin calcium carbonate precipitation and consequent soil reinforcement. A mathematicalmodel was created to describe the process.

  • Modelling the seasonal dynamics of SPM with a simple algorithm for the buffering of fines in a sandy seabed

    Auteurs: Kessel, T. van; Winterwerp, J.C.; Prooijen, B. van; Ledden, M. van; Borst, W. (2007)

  • Sand transport by surface waves : can streaming explain the onshore transport?

    Auteurs: Kranenburg, W.; Ribberink, J.S.; Uittenbogaard, R.E. (2010)

  • Influence of sand and scale on the piping process : experiments and multivariate analysis

    Auteurs: Beek, V.M. van; Knoeff, J.G.; Rietdijk, J.; Sellmeijer, J.B.; Lopez de la Cruz, J. (2010)

  • Coastal zones and climate change : a sediment perspective on adaptation

    Auteurs: Mulder, J.P.M.; Spek, A.J.F. van der; Meulen, M.J. van der (2009)

    Proceedings International Conference on Coastal Engineering Meeting Coastal Challenges, August 31 - September 5, 2008, Hamburg, Germany. pp. 4053-4064.

  • Variability in transport of fish eggs and larvae (III) : effects of hydrodynamics and larval behaviour on recruitment in plaice

    Auteurs: Bolle, L.J.; Beek, J.K.L. van; Erftemeijer, P.L.A. (2009)
    Gepubliceerd in: Marine ecology progress series (MEPS), volume 390 (2009), pagina 195-211

  • Beyond dry feet? : experiences from a participatory water-management planning case in the Netherlands

    Auteurs: Lamers, M.; Ottow, B.T. (2010)
    Gepubliceerd in: Ecology and society, volume 15 (2010) nummer 1, pagina 1-19 (paper 14)

    This article presents a participatory planning process designed and implemented at Water Board “Hoogheemraadschap De Stichtse Rijnlanden” (HDSR) in the center of The Netherlands. For a period of 2 years, three groups were involved in various ways, participating in different types of meetings and workshops, using a range of participatory tools and techniques. The process and results of the three groups were monitored and evaluated using a tailored evaluation strategy. This paper analyzes the way the design and implementation of the process is perceived by both the conveners and participants and suggests practical lessons for water managers. Based on our case, it is argued that a careful process design, a thorough and continuous stakeholder analysis, building reflective workshops within and after the process, and ensuring experienced and qualified process leaders can greatly enhance the adaptive capacity and successful outcome of the participatory planning process.

  • Complexity, accuracy and practical applicability of different biogeochemical model versions

    Auteurs: Los, F.J.; Blaas, M. (2010)
    Gepubliceerd in: Journal of marine systems, volume 81 (2010) nummer 1-2, pagina 44-74

    The performance of several generations of North Sea model is compared. Present models are most accurate in predicting the annual trends, while there is less agreement with respect to the level of variation.

  • Revealing spatial pattern dynamics in aquatic ecosystem modelling with Multi-Agent Systems in Lake Veluwe

    Auteurs: Li, H.; Mynett, A.E.; Penning, W.E.; Qi, H. (2010)
    Gepubliceerd in: Ecological informatics, volume 5 (2010) nummer 2, pagina 97-107

  • Utility of different strategies in using emergency flood storage basins in the middle Yangtze River, China

    Auteurs: Chen, L.; Werner, M.G.F. (2009)

    Emergency flood storage basins provide a potentially effective measure in the reduction of flood risk. If these are used efficiently and provide sufficient storage in relation to the volume of the flood event, an appreciable reduction in maximum flood levels can be achieved. However, the utility of such basins is dependent on how these are employed in a given flood event. In complex river systems the optimal strategy with which such flood storage basins should be used is difficult to identify, particularly when taking into account that the true shape of the flood hydrograph is typically not known at the time when the decision on the use of the basins needs to be taken. In this paper the utility of four large emergency flood storage basins in the middle Yangtze river is explored. The reach of the Yangtze considered is downstream of the Three Gorges Dam, and upstream of the city of Wuhan, and includes the Dongting lake area. Three of the storage basins considered are in the lake area, while the fourth and largest basin is on the main Yangtze River. Different strategies in using these basins for the 1998 flood event are explored using a hydrodynamic model of the reach in question. Based on the strategy that provides the largest reduction in flood levels at key sections of the river for the flood event tested, as well as considerations on the typical shape of flood hydrographs in this section of the Yangtze, general recommendations on the use of the four basins are made.

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