Alt.theory-
Great data pertaining to the level of the lake! Excellent job!:woohoo:
You are correct that water cannot be compressed...but if the dam above (Rock Island) is releasing water, it will create a swell/wave (barely perceptible; but present!) that would have a minimal effect on level.
I personally am not going to crunch the numbers to add/subtract elevation....but be aware that there may be small differences and this would account for them. :waitasec:
I did think about that. And the outlet data for Rock Island Dam, like most dams during Feb. had no water sent over the
spillway, (data comes from same page Wanapum Dam info was on). Any "surge" would have been from the outlet from power generation, (QG = discharge from power generation) Here is that info too for the same time frame as before -- while MC was missing. I also attempted to pick out each surge's
start,
high, and
end), which might have created a type of wave that could have effected water levels at the CB property.
Rock Island Dam (RIS means
Rock Island Dam)
QG="Outflow Discharge from Power Generation (KCFS)"
(
From definitions of abbreviations page)
Units KCFS = (1000 cubic feet per second)
//RIS/QG//IR-MONTH/HRXZZAZD/
09FEB2010, 1500; 89.50 (
Tuesday 3 pm - MC goes missing)
09FEB2010, 1600; 20.20
09FEB2010, 1700; 11.20
09FEB2010, 1800; 54.40
09FEB2010, 1900; 137.30 (
Tuesday 7 pm - start of "surge")
09FEB2010, 2000; 144.80
09FEB2010, 2100; 155.10 (
Tuesday 9 pm - high of "surge")
09FEB2010, 2200; 143.30
09FEB2010, 2300; 109.50 (
Tuesday 11 pm - end of "surge")
09FEB2010, 2400; 50.40
10FEB2010, 0100; 29.70
10FEB2010, 0200; 6.60
10FEB2010, 0300; 10.50
10FEB2010, 0400; 21.70
10FEB2010, 0500; 36.70
10FEB2010, 0600; 45.20
10FEB2010, 0700; 79.90
10FEB2010, 0800; 126.40 (
Wednesday 8 am - start of "surge")
10FEB2010, 0900; 149.60 (
Wednesday 9 am - high of "surge")
10FEB2010, 1000; 141.90
10FEB2010, 1100; 149.00
10FEB2010, 1200; 139.50
10FEB2010, 1300; 139.50
10FEB2010, 1400; 126.90
10FEB2010, 1500; 113.50
10FEB2010, 1600; 112.20
10FEB2010, 1700; 108.20
10FEB2010, 1800; 108.70
10FEB2010, 1900; 102.60
10FEB2010, 2000; 110.90
10FEB2010, 2100; 108.60 (
Wednesday 9 pm - end of "surge")
10FEB2010, 2200; 99.90
10FEB2010, 2300; 90.60
10FEB2010, 2400; 69.20
11FEB2010, 0100; 82.50
11FEB2010, 0200; 63.50
11FEB2010, 0300; 16.70
11FEB2010, 0400; 5.90
11FEB2010, 0500; 11.90
11FEB2010, 0600; 31.00
11FEB2010, 0700; 45.30
11FEB2010, 0800; 91.50 (
Thursday 8 am - start of "surge")
11FEB2010, 0900; 100.00
11FEB2010, 1000; 118.90
11FEB2010, 1100; 122.90
11FEB2010, 1200; 123.40 (
Thursday noon - high of "surge")
11FEB2010, 1300; 118.50
11FEB2010, 1400; 117.30
11FEB2010, 1500; 106.70 (
Thursday 4 pm - end of "surge")
11FEB2010, 1600; 82.00
11FEB2010, 1700; 52.10
11FEB2010, 1800; 55.30
11FEB2010, 1900; 84.60
11FEB2010, 2000; 110.50 (
Thursday 8 pm - start of "surge")
11FEB2010, 2100; 119.20 (
Thursday 9 pm - high of "surge")
11FEB2010, 2200; 105.60 (
Thursday 10 pm - end of "surge")
11FEB2010, 2300; 81.10
11FEB2010, 2400; 34.00
12FEB2010, 0100; 8.50
12FEB2010, 0200; 6.40
12FEB2010, 0300; 12.20
12FEB2010, 0400; 50.30
12FEB2010, 0500; 26.90
12FEB2010, 0600; 23.50
12FEB2010, 0700; 68.40
12FEB2010, 0800; 135.10 (
Friday 8 am - start of "surge")
12FEB2010, 0900; 141.30 (
Friday 9 am - high of "surge")
12FEB2010, 1000; 139.70
12FEB2010, 1100; 133.80
12FEB2010, 1200; 109.70 (
Friday noon - end of "surge")
12FEB2010, 1300; 68.60
12FEB2010, 1400; 42.10
12FEB2010, 1500; 75.30
12FEB2010, 1600; 93.20
12FEB2010, 1700; 98.30
12FEB2010, 1800; 77.30
12FEB2010, 1900; 78.20
12FEB2010, 2000; 61.40
12FEB2010, 2100; 72.50
12FEB2010, 2200; 100.80
12FEB2010, 2300; 40.90
12FEB2010, 2400; 16.40
13FEB2010, 0100; 22.30
13FEB2010, 0200; 75.80
13FEB2010, 0300; 56.30
13FEB2010, 0400; 38.40
13FEB2010, 0500; 39.30
13FEB2010, 0600; 37.50
13FEB2010, 0700; 61.30
13FEB2010, 0800; 64.30
13FEB2010, 0900; 76.10
13FEB2010, 1000; 52.30
13FEB2010, 1100; 82.80
13FEB2010, 1200; 85.80
13FEB2010, 1300; 81.10 (
Saturday 1 pm - body found)
13FEB2010, 1400; 70.20 (
2 pm Douglas County LE arrive at CB)
MOO follows -- When compared side-by-side, the changes/"surges" in outflow at Rock Island Dam seem to coincide consistently with the elevations level from Wanapum Dam which I posted previously.
So, it appears to me MOO that, (at least without use of the spillway), there is not so much a "surge" wave that effects the level of the reservoir, but a constant rising and lower of the entire reservoir level. If the elevation at the lower dam seems to show the effect of the outflow surges, than, I believe, the level in front of the Crescent Bar property would also show the near same effect, (or is that
Affect? I never seem to get it right).
If the Rock Island spillway had been in use, a type of wave "surge" might form depending on how quickly they allowed water over the spillway. But I think the water from generator use doesn't appear to create the necessary quantities rapidly enough to create a "surge" that isn't also immediately shown in measurements at Wanapum Dam. ("Immediately" because water cannot be compressed.)
This data came from
here. After sniffing around
here and
here.
Interpretation of this data is MOO and was ONLY used to further SPECULATE on the potential for a "surge" type wave effecting water levels at the CB property. IMO, the actual fluctuation of reservoir level in front of the Crescent Bar is better shown in the previously posted data of the "
elevation at the forebay to the powerhouse". Of course, feel free to come to your own conclusions and tell me/us what you think.
ETA: Sorry about the yellow... that's hard to read - and no, I'm not going back and fixing it...
Again ETA: I've posted up more data on the potential for a water "surge" off the CB property
here.