Difference between revisions of "Hydrology"
From Glen Canyon Dam AMP
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==Inflow Volumes to Lake Powell and Release Volumes from Glen Canyon Dam== | ==Inflow Volumes to Lake Powell and Release Volumes from Glen Canyon Dam== | ||
| − | 10-year average natural inflow ( | + | [https://www.usbr.gov/lc/region/g4000/NaturalFlow/provisional.html 10-year average natural inflow (2015-2024)]: 12.60 maf <br> |
| − | 10-year average unregulated inflow (2016-2025): 8.06 maf <br> | + | [https://www.usbr.gov/lc/region/g4000/NaturalFlow/provisional.html 10-year average unregulated inflow (2016-2025)]: 8.06 maf <br> |
| − | 10-year average release (2016-2025): 8.30 maf <br> | + | [https://www.usbr.gov/lc/region/g4000/NaturalFlow/provisional.html 10-year average release (2016-2025)]: 8.30 maf <br> |
| − | 10-year average Lees Ferry Gage (2016-2025): 8.44 maf <br> | + | [https://www.usbr.gov/lc/region/g4000/NaturalFlow/provisional.html 10-year average Lees Ferry Gage (2016-2025)]: 8.44 maf <br> |
{| class="sortable wikitable" style="text-align:center;" | {| class="sortable wikitable" style="text-align:center;" | ||
|- | |- | ||
!Water Year | !Water Year | ||
| − | ! | + | ![https://www.usbr.gov/lc/region/g4000/NaturalFlow/provisional.html Naturalized Flow at Lees Ferry (maf)] |
| − | !Unregulated Inflow (maf) | + | ![https://www.usbr.gov/uc/water/crsp/studies/index.html Unregulated Inflow (maf)] |
| − | !Release Volume (maf) | + | ![https://www.usbr.gov/uc/water/crsp/studies/index.html Release Volume (maf)] |
| − | ! | + | ![https://www.usbr.gov/uc/water/crsp/studies/index.html Lees Ferry Gage (maf)] |
|- | |- | ||
| − | |2026|| | + | |2026||03.40||03.72||06.000||~05.948|| |
|- | |- | ||
| − | |2025|| | + | |2025||08.50||04.688||07.481||07.503|| |
|- | |- | ||
| − | |2024||11. | + | |2024||11.88||07.981||07.480||07.551|| |
|- | |- | ||
| − | |2023||17.41||13.421||08. | + | |2023||17.41||13.421||08.580||08.749|| |
|- | |- | ||
|2022||09.85||06.084||07.000||07.083|| | |2022||09.85||06.084||07.000||07.083|| | ||
| Line 119: | Line 119: | ||
|2019||17.67||12.951||09.001||09.264|| | |2019||17.67||12.951||09.001||09.264|| | ||
|- | |- | ||
| − | |2018|| | + | |2018||08.63|||04.612||09.000||09.171|| |
|- | |- | ||
|2017||16.40||11.905||09.000||09.170|| | |2017||16.40||11.905||09.000||09.170|| | ||
| Line 231: | Line 231: | ||
|} | |} | ||
| − | [[File: | + | [[File:Temp Precip Flows.png|center|600px]] |
| − | |||
| − | [[File: | + | [[File:WaterUse.png|center|600px]] |
|} | |} | ||
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|- | |- | ||
| − | ! <h2 style="margin:0; background:#cedff2; font-size:120%; font-weight:bold; border:1px solid #a3b0bf; text-align:left; color:#000; padding:0.2em 0.4em;"> | + | ! <h2 style="margin:0; background:#cedff2; font-size:120%; font-weight:bold; border:1px solid #a3b0bf; text-align:left; color:#000; padding:0.2em 0.4em;">Presentations and Papers</h2> |
|- | |- | ||
|style="color:#000;"| | |style="color:#000;"| | ||
| − | + | '''2026''' | |
| − | + | *[https://www.usbr.gov/uc/progact/amp/twg/2026-06-10-twg-meeting/uc-gcdamp-twg-basinhydrology-508-20260610.pdf Basin Hydrology and Operations] | |
| − | + | *[https://www.usbr.gov/uc/progact/amp/amwg/2026-05-13-amwg-meeting/uc-gcdamp-amwg-basinhydrology-508-20260513.pdf Basin Hydrology and Operations] | |
| − | + | *[https://www.usbr.gov/uc/progact/amp/twg/2026-04-09-twg-meeting/uc-gcdamp-twg-basinhydrology-508-20260409.pdf Basin Hydrology and Operations] | |
| − | + | *[https://www.usbr.gov/uc/progact/amp/twg/2026-02-05-twg-meeting/uc-gcdamp-twg-basinhydrology-508-20260205.pdf Basin Hydrology and Operations] | |
'''2025''' | '''2025''' | ||
Latest revision as of 10:22, 14 October 2026
 |
Upper Colorado River Basin HydrologyUpper Colorado River Basin regularly experiences significant year to year hydrologic variability. During the 21-year period 2000 to 2020, however, the unregulated inflow to Lake Powell, which is a good measure of hydrologic conditions in the Colorado River Basin, was above average in only 4 out of the past 19 years. The period 2000-2020 is the lowest 21-year period since the closure of Glen Canyon Dam in 1963, with an average unregulated inflow of 8.62 maf, or 80 percent of the 30-year average (1981-2010). (For comparison, the 1981-2010 total water year average is 10.83 maf.) The unregulated inflow during the 2000-2020 period has ranged from a low of 2.64 maf (24 percent of average) in water year 2002 to a high of 15.97 maf (147 percent of average) in water year 2011. In water year 2018 unregulated inflow volume to Lake Powell was 4.6 maf (43 percent of average), the third driest year on record above 2002 and 1977. [1] |
| Current Status |
Current Operations |
Inflow Forecasts and Model Projections |
|---|
