Difference between revisions of "Hydrology"

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Revision as of 13:40, 25 November 2020
Hydrology.jpg

Upper Colorado River Basin Hydrology

The 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

Updates

Upper Colorado Region Homepage

USBR Weekly Water Reports

  1. Reservoir inflows (forecast and observed)
  2. Reservoir releases
  3. SNOTEL
  1. Water use

USBR Monthly/Annual Reports

Snow Pack Reports

U.S. Drought Monitor

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. [2]


https://usea.org/sites/default/files/event-/Final_Colorado_Overview.pdf
http://www.lakepowell.org/page_two/what_s_new/what_s_new.html

Inflow and Release Volumes

Water Year Unregulated Inflow (maf) Release Volume (maf)
2021 06.79 (Nov forecast) 8.234
2020 05.85 8.23
2019 12.95 xx
2018 04.62 xx
2017 11.92 xx
2016 09.62 xx
2015 10.20 xx
2014 10.40 xx
2013 05.12 xx
2012 04.91 xx
2011 15.98 xx
2010 08.43 xx
2009 10.22 xx
2008 12.09 08.98
2007 08.77 08.25
2006 08.65 08.24
2005 12.81 08.25
2004 05.91 08.23
2003 06.17 08.26
2002 02.64 08.24
2001 07.01 08.25
2000 06.97 09.38
1999 12.81 11.24
1998 13.57 13.55
1997 17.07 13.85
1996 10.40 11.52
1995 15.91 09.25
1994 06.80 08.31
1993 14.44 08.13
1992 07.35 08.00
1991 08.82 08.13
1990 05.31 08.16
1989 05.95 08.03
1988 08.00 08.14
1987 13.41 13.48
1986 18.56 16.89
1985 17.53 19.14
1984 20.86 20.50
1983 20.38 17.51
1982 12.78 08.33
1981 05.65 08.32
1980 13.68 10.91
1979 14.20 08.32
1978 11.07 08.39
1977 03.55 08.30
1976 08.43 08.48
1975 13.10 09.28
1974 09.98 08.27
1973 15.99 10.14
1972 09.33 09.31
1971 11.82 08.62
1970 12.01 08.70
1969 11.53 08.84
1968 10.32 08.33
1967 08.99 07.82
1966 08.72 07.88
1965 15.05 10.83
1964 07.49 02.41


Water Flow Gages

Presentations and Papers

2020

2019

2018

2017

2016

2015

2014

2013

2012

2011

2010

2009

2003

Other Stuff
Retrieved from "http://gcdamp.com/index.php?title=Hydrology&oldid=9329"