Topographical surveys of watercourses, adjacent lands and property thresholds of residential and commercial premises were collected for Na Dúnaibh in January and February. These works captured the data needed to build an up to date computer model of the Scheme Area. The model will simulate flow scenarios in detail to define flood extent and depth. Model outputs will identify properties at risk from flooding and what may be needed to protect them. If measures are required, the options considered will range from nature based catchment solutions that slow the flow, to localised interventions such as embankments or adapting existing defences, or a combination of these. All measures will be subject to a rigorous environmental assessment.
Murphy Geospatial carried out survey works in Na Dúnaibh on the following dates:
- 18th January – 21st January 2021: River Channel and Coastal Survey (Rosapenna Stream and Downings Bay);
- 25th – 26th January 2021: Land and Property Threshold Survey.
The maps provided indicate the overall survey area and the location of property threshold surveys.
Murphy Geospatial recorded levels at the lowest point on the property which may be susceptible to flood risk, the threshold level. Generally, this is the front door of the property and can be recorded from the public road. However, in some cases, if the lowest point is at the rear of the property, or if there is a shed or secondary building on the property, an additional threshold level may need to be recorded which may not be visible from the public road.
Donegal County Council has obtained necessary safety and bio-security statements from the surveyors demonstrating their protocols and procedures, particularly in relation to Covid 19 and biodiversity.
Donegal County Council thank the public in advance for their co-operation which will greatly inform how flood risk in Na Dúnaibh should be managed.