Glossary

AEP               

Annual Exceedence Probability; this represents the probability of an event being exceeded in any one year and is an alternative method of defining flood probability to ‘return periods’. The 10%, 1% and 0.1% AEP events are equivalent to 10-year, 100-year and 1000-year return period events respectively.

AFA               

Area for Further Assessment – Areas where, based on the Preliminary Flood Risk Assessment and the CFRAMS Flood Risk Review, the risks associated with flooding are potentially significant, and where further, more detailed assessment is required to determine the degree of flood risk, and develop measures to manage and reduce the flood risk.

ARR              

Area for Risk Review

CAR              

Community at Risk

CFRAM         

Catchment Flood Risk Assessment and Management – The ‘CFRAM’ Studies will develop more detailed flood mapping and measures to manage and reduce the flood risk for the AFAs.

DAD              

Defence Asset Database

DAS               

Defence Asset Survey

DTM               

Digital Terrain Model (often referred to as ‘Bare Earth Model’)

EPA               

Environmental Protection Agency

FRI                 

Flood Risk Index – a metric that allows the risk to different types of assets (e.g., home, business, monument, utility asset, etc.) to be expressed numerically, but without attempting to assign monetary values to all types of damage.

FRMP            

Flood Risk Management Plan. This is the final output of the CFRAM study. It will contain measures to mitigate flood risk in the AFAs.

FRR               

Area for Flood Risk Review – an appraisal of the output from the PFRA involving on site verification of the predictive flood extent mapping, the receptors and historic information.

HA                 

Hydrometric Area, Ireland is divided up into 40 Hydrometric Areas.

HPW              

High Priority Watercourses. A watercourse within an AFA.

IRR                

Individual Risk Receptors

MPW             

Medium Priority Watercourses. A watercourse between  AFAs and between an AFA and the sea.

NTCG                        

National Technical Coordination Group

PFRA            

Preliminary Flood Risk Assessment – A national screening exercise, based on available and readily-derivable information, to identify areas where there may be a significant risk associated with flooding.

SEA               

Strategic Environmental Assessment. A high level assessment of the potential of the FRMPs to have an impact on the Environment within a UoM.

UoM               

Unit of Management. The divisions into which the RBD is split in order to study flood risk. In this case a HA.

WFD              

Water Framework Directive. A European Directive for the protection of water bodies that aims to, prevent further deterioration of our waters, to enhance the quality of our waters, to promote sustainable water use, and to reduce chemical pollution of our waters.

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