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FLOOD DATA COLLECTION

[25 November 2009]

Flood data collection is vital during and following flooding events e.g. photographs, videos, water levels and extents.

Data and information on historic flood events is essential to identify where flood risk management measures are required and to efficiently design the most effective system for mitigating the risk.

We have prepared a brochure containing information on flooding and a form, particularly aimed at Local Authorities, to structure the collection of this data.

Flood Data Collection brochure (pdf)

Flood Data Collection form (pdf, support notes, spreadsheet)

CONSULTATION ON DRAFT PREDICTIVE FLOODMAPS FOR LEE, CO. CORK

[02 June 2009]

Predictive floodmaps are a key output of the Lee CFRAM Study, showing areas likely to be affected during flooding of different probabilities.

The maps have been quality checked by the Project Team, and have been viewed by stakeholders and members of the public during the Public Information Days held throughout the study area in May 2009. However, they will not be finalised until the draft Catchment Flood Risk Management Plan is available for consultation, and the stakeholders are currently seeking feedback on the maps.

These theoretical maps are derived using information from detailed hydrological analysis and numerical hydraulic river/estuary models, which estimate:

  • How much water will flow in watercourses for floods of various extremities or probabilities (i.e. floods that have a 1/10, 1/100 or 1/1000 chance of occurring in any given year);
  • What flood levels will result from that flow at different locations along the watercourses; and
  • Where that water might go when it floods out over the riverbank onto the land adjacent to the watercourse (the “floodplain”).
  • To access the draft Lee Predictive Flood maps please follow the link below: -
    http://www.leecframs.ie/floodmaps/

    NEWCASTLE WEST FLOOD SEVERITY AND IMPACT REPORT

    [5 September 2008]

    In the early hours of 1st August 2008, Newcastle West in Co. Limerick experienced heavy rainfall and serious flooding. A report on the event is now available on the Limerick County Council website.

    Click here for link to the Newcastle West Flood Severity and Impact Report

    FLOOD DATA COLLECTION CONTINUES

    [15 August 2008]

    Recent heavy rainfalls across Ireland have resulted in a number of flood events. Currently, flooding information on these events is being gathered and verified by OPW regional offices. These records will be uploaded to the National Flood Hazard Mapping website in the near future. If you have any relevant flood data that you would be willing to make available to the OPW, please contact the following regional offices:

    Southwest Region - (061) 209113
    East Region Office - (046) 9431352
    West Region - (093) 36354

    PREDICTIVE FLOOD MAPS ARE KEY TO LIMITING DAMAGE

    [14 August 2008]

    Article Published in Evening Herald, Thursday 14/08/08
    Author: - Andrew Phelan
    FLOODING experts are working on a huge project that could hold the key to predicting where future deluges will strike. "Predictive" maps could help minimise the kind of damage done during floods like those that have struck the country the last week. The maps are the next step in an ongoing study being undertaken by the Office of Public Works.

    HAZARD

    The OPW's existing online flood hazard websites have clocked up a massive 1.5 million hits from the public since they were set up less than two years ago. That service, set up under an EU directive, uses a compilation of past events to let users see a flooding history of their own street. Phase Two of the project involves developing maps showing areas expected to be flooded. A pilot project is being carried out on the River Lee in Cork and will be finished next year. Work has also begun on similar projects for the Dodder in Dublin, the Fingal-East Meath catchment areas and the Suir in Waterford. Predictive maps for all catchments will be available by 2015. An OPW spokesman said the maps could be used by local authorities and emergency response agencies in tackling floods. Councils can also use the information when drawing up development plans and to assess planning applications. "What we have been doing is getting all the data together to get the record going back 100 years," he said. "Some areas can be identified as being at higher risk than others. We can then get into predictive maps, with modelling based on what we know already and 'what if scenarios. "Predictive flood hazard maps will be developed as part of an ongoing programme that will produce flood risk assessment and management plans for each catchment where there is significant flood risk". The massive bank of data being drawn up by the OPW aims to make the targeting of flood relief and risk management programmes easier. Predictive maps could become an even more important tool in flood preparation, planning and response. In Phase One, data was collected from more than 40 state bodies and other organisations, including engineering reports, photographs and previously undocumented local knowledge of local authority field staff

    FLOOD MAPPING PRESENTATION AT IAH

    [7th November 2007]

    The OPW delivered a presentation of the OPW flood mapping website at a "Technical Discussion" Meeting of the International Association of Hydrogeologists (Irish Group) at 6pm on Tuesday, 6th November, at the Geological Survey of Ireland, Beggars Bush, Haddington Road, Dublin 4.

    FLOOD MAPPING WEBSITE WILL FACILITATE MEETING EU DIRECTIVE

    [6th November 2007]

    The forthcoming EU directive on the assessment and management of flood risk, published by the European Union on the 6th November 2007, will require that each member state undertakes a Preliminary Flood Risk Assessment, based on available or readily driveable information, to provide an assessment of the potential flood risk nationally. The information collected for, and stored on, the flood mapping database will facilitate this process, and it is intended to use this database extensively in the preparation of the Preliminary Flood Risk Assessment for Ireland.

    PILOT PREDICTIVE FLOOD MAPS UNDERWAY FOR LEE CATCHMENT

    [22nd October 2007]

    The first set of predictive flood maps (i.e. flood maps showing areas that are at risk of inundation for floods of defined magnitude/frequency) are currently being developed for the Lee Catchment in Co. Cork, as part of the pilot Catchment Flood Risk Assessment & Management Study, being undertaken by Halcrow Group Limited (see www.leecframs.ie).

    Sample predictive maps are currently being reviewed at Steering Group level to finalise the formats that these predictive flood maps will take, both for the Lee, and for other catchments around Ireland. It is anticipated that the full predictive mapping for the Lee Catchment will be completed in Spring 2008. Maps for the Dodder and Suir Catchments are also currently being prepared. Once approved by the respective study area stakeholders, these predictive flood maps will be made available on www.floodmaps.ie.

    FLOOD MAPPING WEBSITE KEYNOTE LECTURE AT HYDROLOGY SEMINAR

    [19th October 2007]

    The Project Manager for the development of the Flood Hazard Mapping website, George Peters (DHV Netherlands), will deliver this year's opening lecture at the National Hydrology Seminar on the OPW flood mapping website, floodmaps.ie. The conference, being held in Tullamore on 13th November, will deal with "GIS In Hydrology: Applications - Modelling - Data Issues", and will look at the application of GIS in hydrology, and particularity flood hydrology, in Ireland and abroad.

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