Preliminary flood risk assessment in Finland

The EU Floods Directive (2007/60/EC) and the national legislation for its implementation include preliminary flood risk assessment, flood mapping and flood risk management planning. Areas of potential significant flood risk (APSFRs) are identified from the whole member state on the grounds of preliminary flood risk assessment (PFRA). The assessment is based on existing information, or data that can be derived from it, such as experiential flood information, hydrological records and different kinds of geographic data (GI-data). The flood risk management plans (FRMPs) of fluvial floods should be established for those river basins that include at least one APSFR. Thus, preliminary flood risk assessment forms an important basis for flood risk management.

Centres for Economic Development, Transport and the Environment (ELY Centres) have during 2018 reviewed the risk of fluvial and sea water flooding in Finland. During the hearing, municipalities as well as interest groups and the public had a possibility to give feedback. The proposals were revised by the ELY Centres based on feedback received. After that the Ministry of Agriculture and Forestry named the areas of significant flood risk and set up flood risk management groups for these areas. The flood risk has been assessed as significant in 22 areas. 17 are alongside inland water bodies, and 5 are on the coast. The greatest risk of fluvial flooding is assessed to be in the City of Pori, located on the coast of the Gulf of Bothnia and at the mouth of Kokemäenjoki river. More than 20.000 citizens are living within the flood-prone area in Pori.

In addition, municipalities are responsible for the flood risk management related to pluvial floods. They have assessed the risk of pluvial flooding in urban areas.

 

 

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Background information on the proposals (preliminary flood risk assessments etc.) is available in Finnish and in Swedish:

Assessing the significance of a flood risk

In the preliminary flood risk assessment, both the probability of flooding and the possible damage caused by floods were taken into account. Several criteria were considered when evaluating the possible damage. These criteria include:

  1. Adverse consequences to human health and safety
  2. Long-term interruption of necessaries such as water supply and sewerage, energy supply, telecommunications, road traffic etc.
  3. Long-term interruption of economic activity which ensures essential functions of community
  4. Long-term or extensive adverse consequences to the environment
  5. Irretrievable adverse consequences to cultural heritage
Published 2014-09-29 at 12:53, updated 2019-03-05 at 12:43