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Auflistung nach Autor:in "Knol, Onno M."

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  • Konferenzbeitrag
    Developing the CLEAN Model: a Tool to Evaluate Policy Options for Reduction of Mineral surplus, Ammonia Emissions to Air and Nitrogen and Phosphate Emissions to soil
    (Umweltinformatik ’99 - Umweltinformatik zwischen Theorie und Industrieanwendung, 1999) Knol, Onno M.
    Agriculture in the Netherlands produces high emissions of minerals to soil and ammonia to air, which cause environmental problems. The CLEAN model is a tool to evaluate policy options to reduce these problems. An overview of the model is presented and the difficulties in calculating manure surpluses and manure destinations are highlighted. To fulfil its purpose the model needs to be rather detailed, use large amounts of data, be fast, and produce reliable results. The model concepts and information technology that were chosen to meet these requirements are discussed. Special attention is paid to the position of the model in a larger information system and the use of a relational database. The development of this environmental information system will be evaluated and based on this experience, some remarks will be made on model integration.
  • Konferenzbeitrag
    INIS, an Information System to Support the Calculation of the Natural Capital Index (NCI) in The Netherlands
    (Environmental Communication in the Information Society - Proceedings of the 16th Conference, 2002) Knol, Onno M.; Brink, Ben ten
    A group of experts has calculated a Natural Capital Index (NCI) for the Netherlands, based on the size of the remaining ecosystems and their quality. An NCI was calculated for 27 nature types, using thousands measurements of about 1000 different species, which were aggregated to 2 national indexes, for the natural and agricultural area. To support this complex and extensive task, an information system INIS was build to monitor the process, standardise and speed up data processing and to allow continuous quality-control. INIS consists of a relational database with species-lists, monitoring and baseline data, ecological information on species, availability of models, policy-relevance data and sensitivity to environmental pressures. Simple scorecards can provide instant overview of the quality of the results. A simple and universally applicable framework for cal-culating future NCI’s, also in other countries is the achieved.
  • Konferenzbeitrag
    Sharing Environmental Information at Various Hierarchical Levels of Abstraction – Some Experiences in the Netherlands.
    (Environmental Informatics and Industrial Ecology, 2008) Knol, Onno M.; Brandes, Laurens J.; van der Maas, C. Wim M.
    The Shared Environmental Information System initiative (SEIS) is an important step in sharing environmental information. Experiences with two environmental information systems in the Netherlands, www.prtr.nl and www.milieuennatuurcompendium.nl, have provided insights which may contribute to the development of SEIS. The main question is how to provide the right type of information to the different user groups. A theoretical framework, the pyramid of hierarchical levels of information, is used to structure the different types of information (Figure 1). Each hierarchical level in data aggregation has its own target group. Some levels are less useful to a wider audience and it is questionable whether much effort has to be made to make this kind of information suitable for the group. It would be preferable a) to determine first what kind of information is suitable and needed for each target group and b) to provide each target group with its own information stream, despite the extra costs and efforts involved.
  • Konferenzbeitrag
    The BIOSCORE 2 project:Developing a Model to Compare Biodiversity Effects of European Nature Policy Scenarios
    (EnviroInfo & ICT4S, Adjunct Proceedings, 2015) Knol, Onno M.; van Hinsberg, Arjen; Hendriks, Marjon
    The concept, model framework and first results of BIOSCORE 2 are described. The model allows making projections of future nature quality and biodiversity situations in Europe, based on empirical relations between species occurrence and environmental pressure factors like land use change, intensification, air pollution, water use, fragmentation, climate change and nature management.