








One of the most common applications is flood frequency analysis, where maximum annual flows are analyzed to determine flood risks. Researchers have successfully used HYFRAN-PLUS in combination with HEC-RAS and HEC-HMS software to calculate flood hydrographs, rainfall depths, peak flows, and excess water volumes for return periods ranging from 2 to 100 years.
| Location | Application | Key Findings | |---|---|---| | Al-Adhaim Basin, Iraq | Rainfall distribution testing | Gumbel distribution identified as most appropriate for maximum-likelihood frequency analysis | | Al-Khoser River Basin, Northern Iraq | Frequency analysis of rainfall events | Gumbel distribution provided best fit, followed by log-normal and gamma distributions | | Kerian River Basin, Malaysia | Rainfall data analysis | Statistical values generated for multiple stations to test data independence and stationarity | | Lower Filyos Basin, Türkiye | Flood analysis | Rainfall depth and peak flow rate increased significantly with return period | | Northwestern Algeria | IDF curve modeling | Integration with Hydraccess software for regional rainfall analysis |
Advanced Care. Proven Results. 🩺
Compare different statistical laws (such as Gumbel, Weibull, or Log-Pearson Type III) to see which best fit the local river data. The "Plus" Evolution
Even experienced crews make these errors with Hyfran Plus: hyfran plus
HYFRAN-PLUS is a powerful Windows-based software designed specifically for statistical frequency analysis, with a primary focus on . Its name is an acronym for HY drological F requency AN alysis PLUS Decision Support System (DSS).
Another significant feature of Hyfran Plus is its ability to handle historical and censored data. In many parts of the world, systematic records of river flow only began in the mid-20th century. However, there may be historical evidence of massive floods that occurred prior to instrumental records (paleo-floods). Hyfran Plus allows for the integration of this qualitative historical information into the statistical model, effectively extending the effective record length and reducing uncertainty. This capability is crucial for "low-flow" analysis as well, aiding in the management of droughts and water supply allocation during dry periods. One of the most common applications is flood
While HYFRAN-PLUS is a powerful specialized tool, other software options exist for frequency analysis:
Identify the best fit distribution for extreme rainfall events. Proven Results
Predicting rare but catastrophic weather events requires reliable statistical modeling rather than simple guesswork. HYFRAN-PLUS acts as the analytical engine behind massive public works and safety frameworks in several key fields:
Hyfran Plus can be used in a variety of applications, including: