Coastal Erosion Risk assesses hazard of coastline degradation and retreat. The methodology integrates two main components: intrinsic vulnerability of a specific coastline and impact of climate factors (sea level rise and wave intensity) on it. This risk is calculated only for sites within 2 km of sea.
To calculate risk, the following variables are used:
Calculation process is based on combining a static coast vulnerability score and a dynamic score measuring 'force' of climate agents.
Coastal Susceptibility Score (CSS) This static score assesses how intrinsically vulnerable a coast is to erosion. CSS is normalized value between 0 and 1, where 1 indicates maximum susceptibility.
Climate Forcing Score (CFS) This dynamic score quantifies stress exerted by climate on coast. It is weighted average between SLR Score and Wave Score.
SLR Score (SLRS) - normalized score (0 to 1) reflecting sea level rise. Wave Score (WS) - compares future wave intensity with historical, using Wave Power Index ().
Erosion Score This approach ensures risk is high only when vulnerable coast (high CSS) is exposed to significant climate change (high CFS).
The methodology is an approach reflecting state of art in coastal risk modeling.
Its strength is structure, based on fundamental principle: Risk = Vulnerability x Hazard.
The multiplicative formula correctly reflects physical reality: risk becomes significant only when both vulnerability and hazard are present.
In conclusion, our methodology is structured according to standard risk framework (CVI type), correctly quantifies intrinsic vulnerability and two main physical hazard drivers (SLR and wave energy), and combines them in logically robust way.
The methodology is an approach reflecting state of art in coastal risk modeling.
Its strength is structure, based on fundamental principle: Risk = Vulnerability x Hazard.
• A COASTAL HAZARDS DATA BASE FOR THE U.S. EAST COAST — introduced Coastal Vulnerability Index (CVI). • Global coastal hazards from future sea level rise — proposed classifying coasts based on coastal geomorphology and coastal slope. • National Assessment of Coastal Vulnerability to Sea-Level Rise (USGS) — explicit vulnerability classification. • Introduction to Coastal Engineering and Management — coastal slope is key variable in all CVI models. • Sea-Level Rise as a Cause of Shore Erosion — introduced the 'Bruun Rule', validating SLR as erosion driver. • U.S. Army Corps of Engineers, Coastal Engineering Manual — Wave Power Index () is standard representation.
The multiplicative formula correctly reflects physical reality: risk becomes significant only when both vulnerability and hazard are present.
In conclusion, our methodology is structured according to standard risk framework (CVI type), correctly quantifies intrinsic vulnerability and two main physical hazard drivers (SLR and wave energy), and combines them in logically robust way.