Flood zones in Cyprus
What the Water Development Department's flood-extent datasets show, how to read a return period, what it means when a point falls inside — or outside — a mapped zone, and why it matters to buyers and owners.
The map's “Flood zones” layer displays the flood-extent data published by the Water Development Department (WDD). These are indicative, modelled extents: areas which hydrological and hydraulic studies estimate would be inundated in floods of a given severity.
What the data show
The map shows four extents: floods with return periods of 20, 100 and 500 years, plus an estimate for the year 2080 incorporating a climate-change scenario. This mapping is part of the implementation of the EU Floods Directive (2007/60/EC) and concentrates on the areas and watercourses assessed as most significant.
A “return period” describes statistical probability, not a calendar. A “100-year” flood is one with roughly a 1% chance of occurring or being exceeded in any given year — not one that happens once every hundred years. A property inside the 20-year extent faces a statistically more frequent hazard than one lying only inside the 500-year extent.
What it means when a point falls inside a zone
It means the point lies within the modelled extent for that return period, as published by the WDD. That is a serious indication worth investigating — but it is not a prediction for a specific property, nor a certificate: the scale of the study, the local terrain and any local works can change the picture considerably at parcel level.
What “outside the zone” does not mean
No indication means “outside the mapped extents of the dataset” — not “no flood risk”. The mapping covers the areas that have been studied; flooding from intense local rainfall, from overloaded stormwater networks, or from smaller watercourses that have not been modelled is not fully captured.
Why it matters to buyers and owners
For a prospective buyer, checking the flood layer is elementary due diligence: protection costs, insurance terms and future development potential are all affected by proximity to a mapped flood extent. For an owner, knowing the zone helps protect the property and anticipate requirements that may attach to future permits — stormwater management studies, for example.
For an assessment at the level of a specific property, the WDD and specialist engineers are the competent sources. The map gives you the starting point: it shows what is published for your area.
How to see the zones on the map
Open the map, switch on the “Flood zones” layer in the layer list (under “Environment & hazards”) and tap any point: you will see which of the four extents cover it. The shades of blue on the map correspond to the four periods.