Which month has the highest streamflow? I used retrospective estimates of streamflow from the national water model for 18,495 U.S. streams spanning 1979-2020 to visualize this question. Since modeled streamflow was used, I calculated all circular statistics based on total monthly streamflow instead of using daily estimates.
If you are interested in this kind of analysis using observed data, I would highly suggest reading Villarini (2016).
