Boicatr - I appreciate your work and you got me thinking about a few things so I made up a graph of my own today. I was really curious about a few things: 1 - how 2013 compared to last year, 2 - what things looked like after your graph and finally - where were all the data converging toward (i.e. approximate annual base flow).
I thought I'd share my graph to illustrate variability in flows. And I was intrigued by the spike in late sept 2013, I seem to recall folks talking about it, but was surprised it was that big and prolonged). It really illustrates that recession curve posted by dutchman.
So here is my effort:
I was pleased to see that in general low flow gage height only varies by 0.2-0.3 feet from high to low years. Obviously those tenths of a foot make a huge difference in floatability at those levels. At any rate, I'm feeling a little better about my chances for a late September trip, though not overly optimistic (there's not a lot of room for error).
Oh, last thing. The gage height is back calculated from the 2014 to 2016 shifted ratings curve. I wanted to compare discharge over the years (more accurate comparison given the changes in the ratings curve) but of course everyone discusses Salmon water in terms of gage height... so I presented it that way.