Mapping hydrological drought hazard

N/A

Reservoir storage, streamflow, snowpack and precipitation.

eng

Not relevant

Not relevant

Mapping hydrological drought hazard

Data requirements to use: Reservoir storage, streamflow, snowpack and precipitation.;

Data used: N/A;

Data format: N/A;

Data access: N/A;

Concise description:

Takes into account the work done by Palmer with PDSI but adds additional information including water supply data (snow accumulation, snowmelt and runoff, and reservoir data), and is calculated at the basin level. SWSI identifies the approximate frequency of mild drought occurrence at 26%–50%, moderate drought occurrence at 14%–26%, and severe drought occurrence at 2%–14%. Extreme drought occurs approximately less than 2% of the time.

eng

Surface Water Supply Index (SWSI)

ISO 19115:2003/19139

1.0

http://www.droughtmanagement.info/indices/