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The sound flood risk management needs more and more effective information systems. In addition to flood risk management planning, the past floods in Finland have proved that up-to-date risk information is essential in emergencies. Therefore in addition to the water system forecasts and flood warnings, the information on potential exposed elements and flood damages are playing a significant role in maintaining an overview of the national flood situation. The national flood information system of Finland, established in 2006 and extended since 2010, brings together the essential information on floods under a single user interface. At the Finnish Environment Institute SYKE, environmental information systems are developed according to a common internal framework HERTTA. The framework is web based and relies on the Microsoft .NET framework, the C# programming language and SQL Server databases. The map service is based on ESRI’s ArcGIS Server technology. The extensions include flood information that serves the EU Floods Directive (2007/60/EC), as well as, national requirements. It includes three steps: preliminary flood risk assessment, flood mapping and flood risk management planning. The EU reporting should be made after each step every six years. The new flood information types of the system are also used for reporting flood damage information about the past floods, potential future floods and areas of potential significant flood risk. In this paper we introduce the new parts and information types of the Finnish flood information system. It is written both from a substance and a technical point of view. The main focus is on flood risk mapping: how to manage different kinds of risk information in the system taking into account the INSPIRE directive (2007/2/EC) and how the information can be used in different kinds of applications. The Ministry of Agriculture and Forestry has funded the development of the flood information system.


Session R38, Decision Support and Information Systems for Flood Events



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