Purpose: | Statistical analyses of hydrologic data |
Developer: | U.S. Army Corps of Engineers Hydrologic Engineering Center (USACE HEC) |
Key Features: | Performs different types of statistical analysis; Calculates confidence limits |
Latest Release: | Version 2.0, October 2010 |
OS Platform: | Windows |
Cost: | Free |
Related Software: | IH-Floods, Peak-FQ |
Website: | HEC-SSP (summary, features, users manual, downloads, etc) |
The HEC-SSP performs statistical analyses of hydrologic data. The program has separate components to perform the following analyses:
Flow Frequency Analysis (FFA); The FFA component assists in annual peak flow frequency analyses
General Frequency Analysis (GFA): . The GFA component has multiple methods, and assists in frequency analysis of annual peak flows as well as stage and precipitation data.
Volume Frequency Analysis (VFA): The VFA component assists in volume frequency analysis of daily flow or stage data.
Duration Analysis (DA): The DA component can be applied on any variable that has data at regular intervals, and used to estimate percent of time that a variable equals or exceeds a specific value.
Coincident Frequency Analysis (CFA): The CFA component is used to compute exceedance frequency relationship of a variable that is a function of two other variables.
Curve Combination Analysis (CCA): The CCA combines multiple frequency curves into a single frequency curve.
Performing a statistical analysis on any of the components assumes that the samples (discharge data) obtained are representative of the parent distribution. The program uses the following five types of statistical distributions to model the parent distribution: none, normal, log normal, Pearson III, and log Pearson III. HEC-SSP can be employed in a wide variety of applications, from the design of hydraulic structures to basin planning.
The HEC-SSP software has several key software features, including a Graphical User Interface (GUI), confidence intervals, and reporting tools. The HEC-FDA was developed by the Hydrologic Engineering Center of the United States Army Corps of Engineers, and is only supported on the Windows operating system.
Advantages | Limitations |
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Illustrative Screens |
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Africa | East Asia and the Pacific | Europe & Central Asia | Latin America & the Caribbean | Middle East and North Africa | South Asia |
Argentina (Rainfall prediction) Venezuela (Rainfall Analysis) |
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