ORRAA - Coastal Risk Index

Yes, the complete methodology for the Coastal Risk Index can be found here: Link

The flood impact maps include coral reefs and mangroves.

The tool does not currently differentiate between the impacts on different coastal habitats.

Loss of coral reefs refers to the removal of the top 1m of coral reefs. Loss of mangroves refers to the loss of frictional drag that is provided by stems and trunks of mangrove.

Future time horizons include sea level rise and changing wave conditions caused by progression of climate change, as well as projected changes in population.

The depth of flooding in a structure influences the amount of damage the structure sustains. This relationship is described as a depth-damage function. The CRI uses widely accepted depth-damage functions to determine the economic impacts of a flood scenario.

A storm return period is the frequency with which a given event is likely to occur, which is related to the probability of the event. For example, a 100-year storm is likely to occur once every 100 years, meaning it has a 1% chance of occurring in a given year.

The economic flood damage estimates are determined by population density and GDP. The population impact estimates are determined by population only.