Difference between revisions of "Hydrology"
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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''' == | ||
Upper 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. [https://www.usbr.gov/uc/water/crsp/cs/gcd.html#:~:text=In%20water%20year%202018%20unregulated,(63%20percent%20of%20average).] | Upper 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. [https://www.usbr.gov/uc/water/crsp/cs/gcd.html#:~:text=In%20water%20year%202018%20unregulated,(63%20percent%20of%20average).] | ||
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[[File:LakePowellInflows1906 2012.JPG|right|400px| https://usea.org/sites/default/files/event-/Final_Colorado_Overview.pdf ]] | [[File:LakePowellInflows1906 2012.JPG|right|400px| https://usea.org/sites/default/files/event-/Final_Colorado_Overview.pdf ]] | ||
Revision as of 11:53, 25 November 2020
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Upper Colorado River Basin HydrologyThe Upper Colorado River Basin regularly experiences significant year to year hydrologic variability. During the 17-year period 2000 to 2015, 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 3 out of the past 17 years. The period 2000-2016 is the lowest 17-year period since the closure of Glen Canyon Dam in 1963, with an average unregulated inflow of 8.57 maf, or 79% 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 2000-2016 period has ranged from a low of 2.64 maf (24% of average) in water year 2002 to a high of 15.97 maf (147% of average) in water year 2011. [1] |
| Current Status |
Current Operations | Inflow Forecasts and Model Projections |
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