ACCU                    Obtain the accumulation of monthly
                        hydro-climatic variables
BiEmp                   Compute the bivariate empirical joint
                        probability
ESPPred                 Drought prediction with ESP method
JDSI                    Compute Joint Drought Severity Index with joint
                        distribution
MSDI                    Compute the Multivariate Standardized Drought
                        Index (MSDI)
PropagationMCC          Compute drought propagation based on maximum
                        correlation
RunDS                   Compute drought duration and severity based on
                        run theory
SDI                     Compute the standardized drought index
UMFreq                  Univariate and multivariate return period
UniEmp                  Compute the univariate empirical joint
                        probability (EMP)
drought-package         Statistical Modeling and Assessment of Drought
