The Planning System and Flood Risk Management - Offaly County ...
The Planning System and Flood Risk Management - Offaly County ...
The Planning System and Flood Risk Management - Offaly County ...
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54Appendix A - Screening for <strong>and</strong>Carrying out the <strong>Flood</strong> <strong>Risk</strong>Assessment1 FLOOD RISK ASSESSMENT<strong>Planning</strong> Guidelines1.1 Overview<strong>Flood</strong> risk assessments (FRAs) aim to identify, quantify <strong>and</strong> communicate todecision-makers <strong>and</strong> other stakeholders the risk of flooding to l<strong>and</strong>, property<strong>and</strong> people. <strong>The</strong> purpose is to provide sufficient information to determinewhether particular actions (such as zoning of l<strong>and</strong> for development, approvingapplications for proposed development, the construction of a flood protectionscheme or the installation of a flood warning scheme) are appropriate.This Appendix seeks to explain the terminology <strong>and</strong> the methodology offlood risk assessment so that decision-makers can consider such assessmentsin an informed manner. It does not seek to duplicate the abundant guidancethat is available from other sources but makes appropriate reference to suchguidance.A flood risk assessment (FRA) can be undertaken either over a large area orfor a particular site to:• assess whether flood risk is an issue for the area, <strong>and</strong> if so, to whatdegree;• identify flood zones (if not already available);• inform decisions in relation to zoning <strong>and</strong> planning applications;• develop appropriate flood risk mitigation <strong>and</strong> management measuresfor development sited in flood risk areas.FRAs can be undertaken at a range of scales relevant to the planning process,as discussed in more detail in Section 1.4 herein. <strong>The</strong> key scales of FRA are:• Regional for (Regional <strong>Planning</strong> Guidelines);• Strategic for City or <strong>County</strong> Development Plans or Local Area Plans);• Site Specific (for master plans <strong>and</strong> individual site planning applications).FRAs are typically undertaken over a number of stages, with the need forprogression to a more detailed stage dependent on the outcomes of the formerstage.1.2 General Principles of <strong>Flood</strong> <strong>Risk</strong> AssessmentWith all FRAs undertaken for l<strong>and</strong>-use change <strong>and</strong> new developments, thereare some general principles that are applicable <strong>and</strong> should be followed. <strong>The</strong>seare noted below: