Friday, March 21, 2008

Some river gages are out/malfunctioning

There are a few river gages that are not functioning properly, due - most likely - to the major storms running through the area, possibly even tearing our or damaging the discharge sensors. For whatever reason, these USGS discharge gages are showing zero cfs discharge, even though the gage height indicator clearly shows a continued water column height increase after the malfunction of the discharge gage. Check out two of the sets of graphs below.



Unfortunately, due to specific station geometry (the geometry of the river-bottom at the location of the stream gage), it is not easy to directly translate gage height (the right-hand graphs) with the discharge (left-hand graphs). This might make it difficult to easily back-cast the actual discharge based on the gage height, especially if the user of the data is not local to the area.

Of course, the discharge gage could have just shut off due to reaching some pre-programmed maximum recording limit, and will turn back on again as flood waters decrease. Since I'm not in a position to go out and check on it, though, I'll just have to wait and see...

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