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🌾
CLIMATE HAZARD RISK ASSESSMENT

Drought

Population and Agriculture Risk

The adapted ClimEmpower drought methodology separates drought risk for Population and Agriculture so that exposure and vulnerability are matched to the asset being assessed.

The hazard component uses the Standardized Precipitation Index over 12 months (SPI-12) and the Normalized Difference Moisture Index (NDMI). Risk is calculated as Hazard Γ— Exposure Γ— Vulnerability after the component variables have been processed on a common scale.

2 risk profilesPopulation and Agriculture
R = H Γ— E Γ— VClimEmpower risk calculation
DROUGHT β€” RISK BLUEPRINT CLIMEMPOWER METHODOLOGY
METHOD OVERVIEW

Population and Agriculture Risk

The assessment combines a mapped climate hazard with the people, assets or ecosystems exposed to it and their vulnerability. Sector-specific indicators then produce the final risk result.

HHazardIntensity & extent
Γ—
EExposurePeople & assets
Γ—
VVulnerabilitySensitivity & capacity
=
RRiskPotential impact
Agriculture
Population
Layer structure, input variables and scoring logic for the drought risk maps.
RISK MAPS β€” SECTORS COVERED

🌾 Agriculture

Agricultural exposure is represented by crop type. Vulnerability includes water demand, soil imperviousness and groundwater potential.

πŸ‘₯ Population

Population exposure includes population density and relevant social/economic assets; vulnerability includes water demand, soil imperviousness and groundwater potential.

RISK INDEX

Drought Risk Index

Composite result of Hazard Γ— Exposure Γ— Vulnerability, expressed on a common 1–1,000 scale.

1–1,000
1–200Very Low

Very low risk class.

200–400Low

Low risk class.

400–600Moderate

Moderate risk class.

600–800High

High risk class.

800–1,000Very High

Very high risk class.

RISK FORMULAS BY SECTOR
RISK FORMULA

Drought Γ— Agriculture

R = H Γ— E Γ— V

HHazard

SPI-12

Meteorological drought indicator based on precipitation deficits over a 12-month accumulation period.

JRC Global Drought Observatory
NDMI

Natural drought component representing vegetation water content and soil-moisture conditions.

Sentinel-2 L2A or Landsat 8/9

EExposure

Crop Types

Differentiates agricultural exposure according to crop type and associated water demand.

CORINE Land Cover 2018

VVulnerability

Water Demand

Proxy for sensitivity of sectors dependent on high water volumes.

CORINE Land Cover 2018
Soil Imperviousness

Represents ecosystem sensitivity and capacity for water infiltration.

Copernicus HRL Imperviousness 2018
Groundwater Potential

Represents groundwater availability/potential relevant during drought.

Hydrogeological data specified in AIT methodology
H, E and V are processed on a common scoring scale before multiplication.
RISK FORMULA

Drought Γ— Population

R = H Γ— E Γ— V

HHazard

SPI-12

Meteorological drought indicator based on precipitation deficits over a 12-month accumulation period.

JRC Global Drought Observatory
NDMI

Natural drought component representing vegetation water content and soil-moisture conditions.

Sentinel-2 L2A or Landsat 8/9

EExposure

Population Density

Presence of people in drought-prone areas.

ESTAT Census Grid 2021
Social Facilities / Basic Services

Critical assets such as healthcare and schools that are sensitive to water-supply disruption.

EU Basic Services / Eurostat
Tourist Accommodation

Economic exposure in regions where tourism is a major water consumer.

OpenStreetMap

VVulnerability

Water Demand

Proxy for sensitivity to high water demand.

CORINE Land Cover 2018
Soil Imperviousness

Represents reduced infiltration capacity.

Copernicus HRL Imperviousness 2018
Groundwater Potential

Represents groundwater potential during prolonged rainfall deficits.

Hydrogeological data specified in AIT methodology
H, E and V are processed on a common scoring scale before multiplication.
ALL VARIABLES & DATA SOURCES
HHazard Variables2 variables+
SPI-12

Precipitation-deficit indicator over a 12-month accumulation period.

DATA SOURCEJRC Global Drought Observatory
RESOLUTION200 m in adapted methodology
NDMI

Vegetation water-content / moisture indicator.

DATA SOURCESentinel-2 L2A or Landsat 8/9
RESOLUTION10 m for Sentinel-2
EExposure Variables4 variables+
Population Density

Population exposure driver.

DATA SOURCEESTAT Census Grid 2021
RESOLUTION1 km
Social Facilities / Basic Services

Facilities sensitive to water-supply disruption.

DATA SOURCEEurostat
RESOLUTIONSubnational / NUTS-3
Tourist Accommodation

Tourism-related economic exposure where relevant.

DATA SOURCEOpenStreetMap
RESOLUTIONRegional / Local
Crop Types

Core exposure variable for Agriculture Drought Risk.

DATA SOURCECORINE Land Cover 2018
RESOLUTION100 m
VVulnerability Variables3 variables+
Water Demand

Sectoral sensitivity linked to water requirements.

DATA SOURCECORINE Land Cover 2018
RESOLUTION100 m
Soil Imperviousness

Sensitivity/capacity for infiltration.

DATA SOURCECopernicus HRL Imperviousness 2018
RESOLUTION10 m
Groundwater Potential

Groundwater potential relevant to drought sensitivity.

DATA SOURCEHydrogeological data in AIT methodology
RESOLUTIONAs specified by source dataset