| drought-package | Statistical Modeling and Assessment of Drought | 
| ACCU | Obtain the accumulation of monthly hydro-climatic variables | 
| BiEmp | Compute the bivariate empirical joint probability | 
| drought | Statistical Modeling and Assessment of Drought | 
| 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) |