Basin Hydrology, Reservoir Operations and 2020 Hydrograph October - - PowerPoint PPT Presentation
Basin Hydrology, Reservoir Operations and 2020 Hydrograph October 21, 2019 Upper Basin Storage and Inflow Water Year 2020 Basin Storage Forecasted Unregulated Inflow 76% As of Issued October 2, 2019 10/18/19 90% Forecast Percent of
90% 85% 54% 81%
76%
1 Percent of average based on the period of record from 1981-2010.
Available online at: www.usbr.gov/uc/water/basin/index.html
Basin Storage
As of 10/18/19
Reservoir Forecast (kaf) Percent of Average1
Fontenelle 1,024 95 Flaming Gorge 1,375 95 Blue Mesa 880 92 Navajo 810 75 Powell 9,500 88
Water Year 2020 Forecasted Unregulated Inflow
Issued October 2, 2019
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Operational Tiers for Water/Calendar Year 20201
1 Lake Powell and Lake Mead operational tier determinations were based on August 2019
24-Month Study projections and will be documented in the draft 2020 AOP. 3,618.56 ft Jan 1, 2020 Projection 1,089.40 ft Jan 1, 2020 Projection
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Most Probable End of CY 2019 Projection: 3,609.83 feet (53% full) Min/Max Range: 3,609.8 to 3,610.4 feet Most Probable End of CY 2020 Projection: 3,618.12 feet (56% full) Min/Max Range: 3,585.4 to 3,657.97 feet
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Most Probable End of CY 2019 Projection: 1,088.59 feet (41% full) Min/Max Range: 1,088.4 to 1,088.8 feet Most Probable End of CY 2020 Projection: 1,081.25 feet (39% full) Min/Max Range: 1,081.25 to 1,121.36 feet
Unit Number
Oct 2019 Nov 2019 Dec 2019 Jan 2020 Feb 2020 Mar 2020 Apr 2020 May 2020 Jun 2020 Jul 2020 Aug 2020 Sep 2020
1 2 3 4 5 6 7 8
Units Available 5 5/6 6/8 6 6 6 6 6 6 6 6 6 Capacity (cfs)
16,800 16,800 /22,520 20,500/
28,000
20,500 20,400 20,400 20,400 20,600 20,900 20,900 20,800 20,800
Capacity (kaf/month)
1,060 1,160 1,420 1,330 1,170 1,250 1,220 1,320 1,280 1,330 1,320 1,310
Max (kaf) 1
625 625 750 1,210 1,070 1,130 1,010 1,000 1,050 1,190 1,270 963
Most (kaf) 2
625 625 750 760 675 700 630 630 650 750 835 600
Min (kaf) 1
625 625 750 860 750 800 710 710 750 850 900 670
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Glen Canyon Power Plant Planned Unit Outage Schedule for Water Year 2020
1 Projected release, based on Oct 2019 Min and Max Probable Inflow Projections and 24-Month Study model runs 2 Projected release, based on October 2019 Most Probable Inflow Projections and 24-Month Study model runs
8.23 9.0 11.89
(updated 10-09-2019)
MOST MAX
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Penstock
Penstock Penstock Penstock
5.0 mg/l 5.0 mg/l 5.0 mg/l
10/12/2005 11/2/2005 12/9/2005 5.0 mg/l
2 2 2 2 2 2 2 2 2 2 3 3 3 3 3 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4 5 5 5 5 5 5 5 5 5 5 5 5 5 6 6 6 7 7 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240
Km Upstream from Dam
Lake Powell Dissolved Oxygen, September 2005
3200 3250 3300 3350 3400 3450 3500 3550 3600 1 2 3 4 5 6 7 8 elevation, Ft Penstock mg/L
2 2 4 4 4 4 4 4 4 6 6 6 6 6 8 8 8 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180 190 200 210 220 230 240
Km Upstream from Dam
Lake Powell Dissolved Oxygen, December 2005
3200 3250 3300 3350 3400 3450 3500 3550 3600 1 2 3 4 5 6 7 8 9 10 11 elevation, Ft mg/L Penstock