Hübner, Christoph ; Winterscheid, Axel ; Horchler, P. ; Rosenzweig, S. ; Iersel, Piet van ; Slikker, J. (2007)
nofdp IDSS ? A planning software for assessing and communicating effectiveness of flood damage prevention measures.
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Kurzbeschreibung (Abstract)

The INTERREG IIIB NWE project nofdp promotes a nature-oriented approach towards flood damage prevention. It addresses a combination of both technical and non-technical measures to reduce the risk of flood damage and to improve nature at the same time. The acronym IDSS stands for Information and Decision Support System. The IDSS is designed to assist water managers in developing flood risk management strategies, which keep track with a balanced view on the often conflicting issues of spatial planning, water management and ecological develop-ment. The IDSS will be applied in the preliminary phase of planning and strategy development. It is designed to support an interactive and iterative planning procedure that stimulates and later incorporates the stakeholder?s feedback. The IDSS can be applied to small and medium scale river basins. The overall objective is to develop software that is modularly structured, open source and free of charge for the user. In that way, it is a strong foundation for further development and enhancement by the later user community. A focus is set on the effect assessment and evaluation of physical measures and policy changes in flood plain management. The IDSS user is able to position different types of measures of nature development and flood damage prevention within a GIS environment. A flood routing model enables rough estimations of the effects on water levels. If more accurate or a different sort of calculation is needed new software technology like the Open Modelling Interface & Environment (OpenMI ) enables coupling the IDSS to external simulation models, which are also equipped with the OpenMI interface. This interface enables to use the synergies of already existing and well validated modelling software. A free version of the Sobek hydraulic model (1-D instationary, licence limited to the calculation of 500 knots) will be delivered together with the IDSS. Sobek will independently be launched by the IDSS. Calculated time series are returned to the IDSS via the Published Interface. Taking good decisions needs a broad knowledge base. Therefore several multidisciplinary modules like ?Conflict Detection?, ?Vegetation Suitability?, ?Water Storage Suitability? and the ?ISAR Application ? are included in the IDSS. Their main purpose is to provide spatial information about restriction areas and areas where placing of measures of flood damage prevention and nature development is recommended. Prior to the evaluation procedure an automated value assessment assists the users in allocating values to the selected evaluation criteria. Planning is considered as an interactive process including debate, feedback and improved planning proposals. Therefore, three methods of evaluation and several communicational functionalities are implemented into the IDSS. At present many Decision Support Systems for catchment management are developed, but in most cases they are not transferable to other catchments. This contribution presents a planning software that is transferable to other catchments. The modular structure provides the flexibility to enhance the system according to one?s individual needs. Existing and therefore validated models can be incorporated into the iterative decision process making use of OpenMI and other interfaces. Structuring and integrating unsorted feedback and information from experts and the public into the planning procedure is possible. The intended purpose of the IDSS is to arrive at better informed decision through interaction with relevant data and information. The IDSS architecture is a first step to a flexible decision support system which is open source, free of charge for the user and applicable for every catchment.

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