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N. Guttman (1991)
A SENSITIVITY ANALYSIS OF THE PALMER HYDROLOGIC DROUGHT INDEXJournal of The American Water Resources Association, 27
Guttman Guttman (1991)
A Sensitivity Analysis of the Palmer Hydrologic Drought IndexWater Resources Bulletin, 27
Hosking Hosking (1990)
L‐Moments: Analysis and Estimation of Distributions Using Linear Combinations of Order StatisticsJ. Royal Statist. Soc. B, 52
Karl Karl (1986)
The Sensitivity of the Palmer Drought Severity Index and Palmer's Z‐Index to Their Calibration Coefficients Including Potential EvapotranspirationJ. Clim. Appl. Meteor., 25
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The Sensitivity of the Palmer Drought Severity Index and Palmer's Z-Index to their Calibration Coefficients Including Potential EvapotranspirationJournal of Applied Meteorology, 25
W. Alley (1984)
The Palmer Drought Severity Index: Limitations and AssumptionsJournal of Applied Meteorology and Climatology, 23
T. Karl (1983)
Some Spatial Characteristics of Drought Duration in the United States, 22
Alley Alley (1984)
The Palmer Drought Severity Index: Limitations and AssumptionsJ. Clim. Appl. Meteor., 23
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ABSTRACT: The Palmer Drought Severity Index, which is intended to be of reasonable comparable local significance both in space and time, has been extensively used as a measure of drought for both agricultural and water resource management. This study examines the spatial comparability of Palmer's (1965) definition of severe and extreme drought. Index values have been computed for 1035 sites with at least 60 years of record that are scattered across the contiguous United States, and quantile values corresponding to a specified index value were calculated for given months and then mapped. The analyses show that severe or extreme droughts, as defined by Palmer (1965), are not spatially comparable in terms of identifying rare events. The wide variation across the country in the frequency of occurrence of Palmer's (1965) extreme droughts reflects the differences in the variability of precipitation, as well as the average amount of precipitation. It is recommended first, that a drought index be developed which considers both variability and averages; and second, that water resource managers and planners define a drought in terms of an index value that corresponds to the expected quantile (return period) of the event.
Journal of the American Water Resources Association – Wiley
Published: Dec 1, 1992
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