Welcome to the U.S. Army Corps of Engineers, Hydrologic Engineering Center's (HEC) Statistical Software Package (HEC-SSP). This software allows users to perform statistical analyses of hydrologic data. The current version of HEC-SSP can perform flood flow frequency analysis based on Bulletin 17B (Interagency Advisory Committee on Water Data, 1982) and Bulletin 17C (England, et al., 2018), a generalized frequency analysis on not only flow data but other hydrologic data as well, a volume frequency analysis on high or low flows, a duration analysis, a coincident frequency analysis, a curve combination analysis, a balanced hydrograph analysis, a distribution fitting analysis, a mixed population analysis, a correlation analysis, and a record extension analysis.
HEC-SSP has been implemented using software guidelines established at HEC. These guidelines will produce more consistent results when using HEC software in water resources studies. Also, the guidelines facilitate a common graphical user interface and "look and feel" for HEC software in the PC environment. Recent HEC software implemented under these guidelines include: rainfall-runoff analysis (HEC-HMS), river hydraulics (HEC-RAS), reservoir system analysis (HEC-ResSim), flood damage analysis (HEC-FDA), flood impact analysis (HEC-FIA), and ecosystem function analysis (HEC-EFM). HEC software implementation is under the guidance of Christopher N. Dunn, Director, Hydrologic Engineering Center.
This chapter discusses the general philosophy of HEC-SSP and gives a brief overview of the capabilities of the software. An overview of this manual is also provided.