Most popular pluviometric indexes used to monitor climate hazards are: Hellman, Criterion, Topor pluviometric index, Rainfall deciles, Angot pluviometric index, Anomaly of standardized precipitation, Bhalme-Mooley drought index, Effective drought index and the Standardized Precipitation Index (SPI). Analysis of rainfall recorded in Oradea, in the period of agricultural years 1971-2011, with SPI
... [Show full abstract] indicates that a series of 4 consecutive years (1995-1999) are rainy and 5 consecutive years (1988-1993) are drought and a trend toward rainy years. Annual SPI values determined in Oradea during 1971-2011 are correlated linearly with rainfall deciles, the correlation was very significant (R2 = 0.9638) because both pluviometric indexes are based for determining on the cumulative probability of precipitation.