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To: janetjanet998; meyer
Projected Reservoir Graph - Based on 8 days of Spillway flow - Visual on "projection rate" to Feet & Days

Hi janetjanet998, Yes, at the current rate of discharge and inflow, the reservoir spill could take a number of days longer than the originally estimated 10-14 days stated by DWR. Assuming that this slope follows, of the last 8 days, it could take close to 30 days to get to the last "turn-off" elevation at 836.28 ft. This would push the date to May 14.

note: this graph projection will vary based on Hyatt power plant discharge augmentation & future precipitation inflow (including snowmelt).

Another point of interest: Note the slope angle change in the last "run off". DWR started the spillway at 50,000 cfs, back then, and later reduced the rate to 40,000 cfs. This is reflected in the slope angle change. Again, it could have been related to a noticing of a "shift" in the optical targets, initiating a "slowing" to try to stabilize the movement of the damaged section. DWR has not revealed any information regarding this matter. IT may be the reason why DWR is limiting the outflow to 35,000 cfs in this current spill. Perhaps, because of a "time squeeze", DWR may take a risk and up the spillway flow?

At the current rate of discharge, the reservoir spill could require 30 days to reach 836.29 ft, placing a "turn-off" date at May 14.



3,238 posted on 04/22/2017 2:18:42 AM PDT by EarthResearcher333
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To: EarthResearcher333; All

with part of the power plant online and less rain the pace(and slope of your graph) of should indicated faster rate drop...

IMO the updated target of May 6th(aka through the last week of May) looks decent for the next stop

looks like a weak-moderate system mon-weds with 1/3 inch of rain at the DAM and 1-2 in the mts at this point

after that the pattern look drier as high pressure builds in....which is typical for this time of year as the dry season looms


I assume that there is still some slippage of that wall even at these lower levels...the longer it runs the more it slips.


3,239 posted on 04/22/2017 3:06:15 AM PDT by janetjanet998
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To: janetjanet998; meyer
Hi janetjanet998, Here is NWS modeled 72hr snow melt for basins draining to Oroville Dam. I may be off on the basin ridges (circled)... Are you familiar enough with this snow melt model if it is additive to the values of rainfall you mentioned? (post 3,241: "after mon-weds light-mod rain event(1/4 inch at DAM and 1-2 in mts)")

Note: Map of Snow melt has numbers in the 4 color ranges - 0.79" to 1.4" green, 1.4" to 2.0" darker green, 2.0" to 3.0" light blue, 3.0" to 3.9" dark blue. (see NWS map below).



3,261 posted on 04/23/2017 2:03:28 PM PDT by EarthResearcher333
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