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Guttman Guttman, Hosking Hosking, Wallis Wallis (1993)
Regional Precipitation Quantile Values for the Continental U.S. Computed from L‐MomentsJ. Clim., 6
G. Kite (1977)
Frequency and risk analyses in hydrology
T. Karl (1986)
The Sensitivity of the Palmer Drought Severity Index and Palmer's Z-Index to their Calibration Coefficients Including Potential EvapotranspirationJournal of Applied Meteorology, 25
D. Preston (1983)
Spectral Analysis and Time SeriesTechnometrics, 25
Guttman Guttman, Wallis Wallis, Hosking Hosking (1992)
Spatial Comparability of the Palmer Drought Severity IndexWater Resources Bulletin, 28
N. Guttman (1991)
A SENSITIVITY ANALYSIS OF THE PALMER HYDROLOGIC DROUGHT INDEXJournal of The American Water Resources Association, 27
N. Guttman, J. Hosking, J. Wallis (1993)
Regional Precipitation Quantile Values for the Continental United States Computed from L-MomentsJournal of Climate, 6
(1991)
A Review of the Palmer Drought Severity Index and Where Do We Go from Here?
Alley Alley (1984)
The Palmer Drought Severity Index: Limitations and AssumptionsJ. Clim. Appi. Meteor, 23
T. Mckee, N. Doesken, J. Kleist (1993)
THE RELATIONSHIP OF DROUGHT FREQUENCY AND DURATION TO TIME SCALES
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
T. Mckee (1995)
Drought monitoring with multiple time scales
N. Guttman (1993)
The Use of L-Moments in the Determination of Regional Precipitation ClimatesJournal of Climate, 6
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
Guttman Guttman (1991)
Sensitivity of the Palmer Hydrologic Drought IndexWater Resources Bulletin, 27
N. Guttman, J. Wallis, J. Hosking (1992)
Spatial Comparability of the Palmer Drought Severity IndexJournal of The American Water Resources Association, 28
(1988)
SAS/ETS User's Guide (Version 6). SAS Institute, Cary, North Carolina
ABSTRACT: The Palmer Drought Index (PDI) is used as an indicator of drought severity, and a particular index value is often the signal to begin or discontinue elements of a drought contingency plan. The Standardized Precipitation Index (SPI) was recently developed to quantify a precipitation deficit for different time scales. It was designed to be an indicator of drought that recognizes the importance of time scales in the analysis of water availability and water use. This study compares historical time series of the PDI with time series of the corresponding SPI through spectral analysis. Results show that the spectral characteristics of the PDI vary from site to site throughout the U.S., while those of the SPI do not vary from site to site. They also show that the PDI has a complex structure with an exceptionally long memory, while the SPI is an easily interpreted, simple moving average process.
Journal of the American Water Resources Association – Wiley
Published: Feb 1, 1998
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