Inadequacy of the gamma distribution to calculate the Standardized Precipitation Index

• Published in: Revista brasileira de engenharia agrícola e ambiental Vol. 19; no. 12; pp. 1129 - 1135
• Main Authors: Blain, Gabriel C., Meschiatti, Monica C.
• Format: Journal Article
• Language: English; Portuguese
• Published: Departamento de Engenharia Agrícola - UFCG 01.12.2015
• Subjects: AGRICULTURAL ENGINEERING; ENVIRONMENTAL SCIENCES; teste de normalidade; goodness-of-fit tests; teste de aderência; rainfall departures; desvios de precipitação; normality test

ABSTRACT The Standardized Precipitation Index was developed as a probability-based index able to monitor rainfall deficit in a standardized or normalized way. Thus, the performance of this drought index is affected by the use of a distribution that does not provide an appropriate fit for the rainfal...