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Terminology

FANFAR uses a terminology based on the United Nations Sendai Framework for Disaster Risk Reduction. (United Nations, 2016, Report A/71/644). Below is an adapted version of the key concepts utilized by FANFAR. See from https://www.undrr.org/terminology for full definitions.

Term (English)MeaningTerme (français)
Sens
Hazard

A phenomenon that may cause loss of life, injury, property damage, social and economic disruption or environmental degradation.

Example: flood

Aléa

Phénomène pouvant faire des pertes de vie, des blessures, des dégâts matériels, des perturbations socioéconomiques ou une dégradation de l’environnement

Exemple: inondation

Exposure

Key assets that may be impacted by the hazard.

Examples: people, infrastructure, housing

Exposition

Actifs clés qui peuvent être affectés par l'aléa.

Examples: personnes, infrastructures, logements

Vulnerability

The susceptibility of the exposed asset to be damaged.

Example: move car or house

Vulnérabilité

La susceptibilité de l'actif exposé à être endommagé.

Example: déplacer une voiture ou une maison

Severity

How serious/large the situation is.

Examples: happens every year vs. highest on record, 1€ vs. 1000 000€ damage

Sévérité

L'ampleur / la gravité de la situation.

Examples: arrive chaque année vs jamais arrivé auparavant, 1 € vs 1000 000 € de dégâts

Disaster riskSum of hazard, exposure & vulnerability: the potential problem to societyRisque du catastropheSomme de l’aléas, de l'exposition et de la vulnérabilité: le problème potentiel pour la société

Variables

Variable nameName in HYPE model (see here for full details)Brief description
StreamflowCOUTSimulated streamflow at each model catchment (sub-basin).

Flood hazard threshold methods

MethodDescriptionDefinition of severity levels
Return-periods based on simulations

Thresholds are defined by analyzing a long historic simulation with the model (normally at least 30 years). A generalized extreme value model is fitted to the data, and used to predict the streamflow magnitude/water level (etc.) expected to be obtained with a certain frequency (return period, normally expressed in years).  More details on the approach can be found in: http://dx.doi.org/10.1016/j.pce.2017.02.010

  • "High" means that the variable exeeds the 30-year return period threshold
  • "Medium" means that the variable exceeds the 5-year return period threshold, but is lower than the threshold for "High"
  • "Low" means that the variable exceeds the 2-year return period threshold, and that it is lower than the threshold for "Medium"
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