Mapping hydrological drought hazard

N/A

Monthly temperature and precipitation. Information on the water-holding capacity of soils can be used, but defaults are also available. A serially complete record of temperature and precipitation data is required.

eng

Not relevant

Not relevant

Mapping hydrological drought hazard

Data requirements to use: Monthly temperature and precipitation. Information on the water-holding capacity of soils can be used, but defaults are also available. A serially complete record of temperature and precipitation data is required.;

Data used: N/A;

Data format: N/A;

Data access: N/A;

Concise description:

Based on the original PDSI and modified to take into account longer-term dryness that will affect water storage, streamflow and groundwater. PHDI has the ability to calculate when a drought will end based on precipitation needed by using a ratio of moisture received to moisture required to end a drought. There are four drought categories: near normal, which occurs approximately 28%–50% percent of the time; mild to moderate, which occurs approximately 11%–27% percent of the time; severe, which occurs approximately 5%–10% percent of the time; and extreme, which will occur approximately 4% of the time.

eng

Palmer Hydrological Drought Index (PHDI)

ISO 19115:2003/19139

1.0

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