The Water Environment (Floods Directive) Regulations (Northern Ireland) 2009

Flood hazard mapsN.I.

11.—(1) Subject to paragraphs (2) and (3), a flood hazard map (or more than one such map taken together) shall show—

(a)the geographical areas which could be flooded according to the following scenarios—

(i)floods with a low probability (or extreme event scenarios);

(ii)floods with a medium probability (likely return period of 100 years or more); and

(iii)floods with a high probability; and

(b)the following elements for each of those scenarios—

(i)the flood extent;

(ii)water depths or water level, whichever is appropriate; and

(iii)where appropriate, the flow velocity or the relevant water flow.

(2) But a flood hazard map need not show information referred to in paragraph (1) as respects a flood with a high probability where the Department considers such a flood would be unlikely to have significant adverse consequences for the area which could be flooded by it.

(3) The Department may decide that for a coastal area which, in its opinion, is adequately protected from coastal floods, the preparation of a flood hazard map (or more than one such map taken together) may be limited to the scenario referred to in paragraph (1)(a)(i).