Site ID: 1806 Lat. 54.4917 Canada 0
River: Skeena Long. -128.5986
Site name: 0 Contributing area: 33110 km2 Ratio to Comparison Station: 0.82
Latest measurement: 8-Jan-10 Mean annual runoff: 693 mm (2003-2007)
Hydrologic status: 1 Ice-covered Total runoff this year: 707 mm
Latest M/C ratio: 0.85 Seven day total: 1 mm
Estimated current discharge: 180 m3/sec Percent of mean 7-day total: 100.0 % (today's value compared to mean for same period, 2003-2007)
Ice-cover determination: M<-9000 5 yr recurrence flood: 2107 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow, 2 = Normal flow, 3 = Flood, 4 = Major Flood 2090 m3/sec (from Gumbel Extreme Value analysis)
Comparison Station Information:  Usk (4206250)           Contributing Area:   sq mi 40322 sq km
(Data from this gaging station are used for the calibration to discharge, with an adjustment for different contributing areas)
Notes: Rating equation is based on comparison of summer monthly means
Discharge and runoff, based on satellite remote sensing (NASA AMSR-E data)
(For U.S, sites, nearby ground station discharge may also be shown)
2008-Present
2002-Present
Annual  Monthly Total Runoff (mm), computed from above satellite-based discharge data
Runoff
(mm) Jan Feb Mar April May June July Aug Sept Oct Nov Dec
408 2002 no data no data no data no data no data no data no data 102.9 104.6 106.7 60.2 33.2
747 2003 20.9 13.2 15.6 31.4 45.4 105.7 127.9 123.9 110.4 110.2 28.1 14.6
772 2004 20.2 13.6 16.7 38.2 62.7 107.6 122.0 117.5 104.6 111.6 30.5 26.3
627 2005 36.7 23.5 25.2 28.8 71.7 107.2 15.1 102.2 106.4 78.6 15.0 16.6
664 2006 14.7 13.2 14.6 12.5 51.0 109.8 123.6 117.8 102.0 104.7 0.0 0.0
656 2007 14.6 13.2 16.5 24.3 35.5 106.4 103.8 132.1 126.4 55.5 13.8 14.0
707 2008 14.6 13.6 14.9 13.8 53.0 109.5 121.1 119.2 122.5 88.8 22.4 14.2
690 2009 13.8 12.0 14.6 17.2 47.3 103.7 119.4 122.1 121.5 86.2 17.3 14.6
Mean Annual Runoff: 696 Standard Deviation: 56
Trend in Annual Runoff (slope):  -13.8
Discharge is estimated directly via a rating equation from the remote sensing data (M/C ratio) shown below.
Explanation:   Green line records upwelling microwave emission from a land parcel (ca 10 km x 10 km) near the river; blue line from a parcel centered over the river.
Brown line is their ratio (M/C; scale on right) and is used to estimate river discharge via a rating equation.
Rating equations are being developed and applied on an individual basis. For calibration status, see "notes" entry, above.
When data above show calibration site values lower than for the measurement site, discharge estimation may not be possible.
GoogleEarth View of Measurement Site
1806.jpg
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