The 2.0 version of Global Environmental Flow Calculator is available as a free download on our website. Global Environmental Flow Calculator is included in Education Tools. The following version: 1.0 was the most frequently downloaded one by the program users. ENV_Flow_Calculator.exe is the common file name to indicate the Global Environmental Flow Calculator installer. This free software was originally designed by IWMI.
From the developer:
The Global Environmental Flow Calculator (GEFC) is a software package for desktop rapid assessment of Environmental Flows (EFs). The EF estimation technique in GEFC is using monthly time step series reflecting “natural” / unregulated flow conditions and its corresponding Flow Duration Curve (FDC)- a cumulative distribution function of flows. The FDC is represented by 17 percentage points on the probability (X) axis.
You may want to check out more software, such as Flow Health, Global DO Monitor or Eagle Global Markets MT4, which might be related to Global Environmental Flow Calculator.