Guidelines for basic statistical analysis of hydrological time series

The present document proposes a methodological standard for the characterization of hydrological time series. A set of statistical parameters, tests and procedures are identified and described in order to standardize, at national level, the minimum set of essential information for an effective elaboration, a correct interpretation and uniform dissemination of hydrological data and results.

The need of a national standard for hydrological data elaboration and presentation comes not only from normative requirements, but also from a real demand of a standardized hydrological analysis, because of huge amount of hydrological information widely available nowadays.

The standardization of the statistical analysis procedures allows data and the elaboration results to be easily comparable, as well.