This article presents an analysis over concept of sustainability and suggests indexes to agro-hydrometeorology variables in the State of the Ceará. The analyzed variables had been total annuals average precipitation in the State, of affluent outflows in the dams that supply Fortaleza and Orós Dam and annual totals annuals of production and yield of grains (maize and beans). The results had shown that the indices of sustainability in all the variables, in accordance with the used methodology, are strong dependents of the factor of confiability, resilience and vulnerability of these variables throughout the years, principally agriculture variables. The vulnerability and confiability in general are out phase with the sustainability. Bigger indices of sustainability had been observed for beans production, yield and precipitation and minors to affluent outflow for dams of the region Metropolitan of Fortaleza and maize production. However, analysis of decadal indices of sustainability of these variables had shown a reduction of the magnitude of these variables with time. The results had shown, also, that the sustainability of all the variables, more evident in the agricultural variables is dependents of the great climatic variability of the Northeast region. New studies are necessary to evaluate which threshold of these indices of sustainable and its defining parameters are associates with better (worse) conditions of welfare state and economic in the State of the Ceará.
Reliability; vulnerability; resilience; agricultural variables
