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chris
Site Admin
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Posted: Apr 29, 2015 Post Subject: Two Upper Cherry Creek flow sites
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There are now two Upper Cherry Creek flow sites reported by Dreamflows.
The first is a realtime physical gauge, which currently reports only gauge height:
http://www.dreamflows.com/graphs/day.665.php
The second is a daily average virtual gauge, which reports flow:
http://www.dreamflows.com/graphs/day.565.php
It's computed by a lengthy formula that includes reservoir information. So while it's probably surprisingly accurate over the long term, short-term there can be large errors. Consequently this site reports only noon-to-noon daily average.
However correlating the two sites isn't so easy, since the first is instantaneous gauge height, while the second is a 24-hour average flow. Hopefully over time we'll develop some kind of reliable rating table for the first gauge so it reports realtime flow directly. [Then, the second gauge can go away].
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chris
Site Admin
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| Posted: May 2, 2015 |
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Hetch Hetchy Water and Power (bless them) came through with a rating table for the Upper Cherry gauge site
http://www.dreamflows.com/graphs/day.665.php
so Dreamflows is now reporting realtime river flow (not just gauge height) for this site. I've added historical data back to March 1.
I'm leaving
http://www.dreamflows.com/graphs/mon.565.php
on the reports for now, since it shows historical data that you can perhaps relate to. It should generally be in the ballpark.
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Edited twice. Last edited by chris May 2, 2015.
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chris
Site Admin
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| Posted: May 15, 2015 |
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I've added historical data for the Upper Cherry gauge site
http://www.dreamflows.com/graphs/day.665.php
back to January 1, 2014. That's all the gauge data that's available. Remember this is actual real live gauge data (not an estimate).
I'm still leaving
http://www.dreamflows.com/graphs/mon.565.php
on the reports for now, since it shows historical data that might be useful. Remember this is calculated data (in effect an estimate) though it should generally be in the ballpark.
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chris
Site Admin
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The realtime physical gauge now has as much historical data as the old estimated site, so have removed the estimated site from the reports.
Since there's just the one site now, the physical gauge site has been renamed from Cherry Creek - Above Cherry Lake Gage to just Cherry Creek - Above Cherry Lake.
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