Avaliação de índices de seca meteorológica e hidrológica em relação ao impacto de acumulação de água em reservatório: um estudo de caso para o reservatório de Jucazinho-PE

Abstract

This work aims to analyze the dry state in a water accumulation reservoir and assess the severity classification difference in different time horizons over the years in order to determine what the best drought indices that can be used as triggers for shooting drought mitigation actions. For this, we used the SPI index (Standardized Precipitation Index), SPEI (Standardized Precipitation‐Evapotranspiration Index), SRI (Standardized Runoff Index), IE (State Index), IS (Synthetic Index) and NM (Target levels), where such indices were compared by a qualitative and quantitative analysis. The results showed that the drought afflicting Jucazinho reservoir or dry severity level of the same, it is not always occur due to natural conditions which the reservoir is exposed. Another important finding is that content such as SPI, SPEI and SRI cannot keep the fluctuation of the water stock in the same speed as do occur.