Hyfran Plus Jun 2026

: A built-in DSS helps users select the most appropriate statistical class for their dataset based on tail properties (how the most extreme values behave).

(Hydrological Frequency Analysis PLUS Decision Support System) is a specialized, industry-standard software tool designed to fit statistical distributions to extreme datasets. Developed by the Chair in Statistical Hydrology at INRS-ETE (Institut National de la Recherche Scientifique) in Canada, this interactive Windows application is a mainstay in civil engineering, meteorology, and water resources management.

for specific statistical distributions within the program. Let me know how you'd like to proceed. Share public link

HYFRAN-PLUS is a specialized software tool designed for hydrological frequency analysis hyfran plus

is a specialized software tool primarily used by hydrologists, researchers, and engineers for hydrological frequency analysis . It simplifies the complex task of modeling extreme events—like floods or heavy rainfall—by fitting statistical distributions to historical data to predict future risks. Core Functionalities

: The software includes 18 different probability distributions (such as Gumbel, GEV, Log-Pearson Type III, and Weibull) to fit data samples that are independent and stationary.

Hyfran Plus’s influence extended into the architecture of ordinary places. Libraries began holding "slow hours" where no devices were allowed and where community members read aloud to each other. Cafés hosted evening tables for conversation, with a pour-over discount for those who stayed silent while another person spoke. A city park set aside a bench where strangers could sit and exchange one honest sentence. The rhythm of attention — three minutes, two minutes, five-minute walks — became, for some, a scaffold to reorder an overstimulated life. : A built-in DSS helps users select the

The software was developed by the research team of Professor Bernard Bobée at the in Québec, Canada. It represents a significant evolution of the original HYFRAN software. A key enhancement is the integration of a Decision Support System (DSS) which helps analysts select the most appropriate class of statistical distributions for their specific dataset. While its primary application is in hydrology for analyzing extreme events like floods and heavy rainfall, its robust statistical framework allows it to be used for fitting statistical distributions to any Independent and Identically Distributed (IID) data series, finding applications in environmental science, engineering, meteorology, and even medical sciences.

A food processing plant in a humid climate (e.g., Louisiana or Singapore).

The true value of HYFRAN-PLUS is demonstrated in its wide range of real-world applications. Here are three examples: for specific statistical distributions within the program

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.

The software assumes that data series are . These assumptions must be verified before analysis, as violations can lead to incorrect conclusions.

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