Site ID: 535 Lat. 64.2807 USA Alaska
River: Yukon Long. -158.6767
Site name: Kaltag Contributing area: 723219 km2 Ratio to Comparison Station: 25.61
Latest measurement: 17-Jul-10 Mean annual runoff: 277 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 135.9 mm
Latest M/C ratio: 1.25 Seven day total: 10.5 mm
Estimated current discharge: 15688 m3/sec Percent of mean 7-day total: 73.7 % (today's value compared to mean for same period, 2003-2009)
5 yr recurrence flood: 25338 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 25342 m3/sec (from Gumbel Extreme Value analysis)
Comparison Station Information:  Boluo (2186950)           Contributing Area:   sq mi 28239 sq km
(Data from this gaging station are used for the calibration to discharge, with an adjustment for different contributing areas)
Notes: Final calibration to discharge has not yet been accomplished.
Discharge and runoff, based on satellite remote sensing (NASA AMSR-E data)
(For U.S, sites, nearby ground station discharge may also be shown)
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
78 2002 no data no data no data no data no data no data no data 31.7 23.8 9.8 6.1 6.3
223 2003 5.9 4.1 1.8 5.5 8.8 59.2 44.8 36.9 31.1 13.4 5.1 6.3
216 2004 6.3 5.9 6.3 5.9 36.3 54.5 41.5 26.7 13.9 6.3 6.1 6.3
300 2005 6.3 5.7 6.3 6.1 42.5 62.8 53.7 47.0 36.3 20.3 6.2 6.3
331 2006 4.5 4.3 3.5 6.1 21.7 81.3 73.8 56.8 57.9 20.7 0.0 0.0
265 2007 6.3 3.9 0.4 6.7 22.4 58.2 53.3 45.9 39.2 17.2 6.1 5.1
276 2008 5.9 3.5 5.7 3.9 24.9 54.0 53.5 55.6 42.4 13.7 6.1 6.3
326 2009 6.1 4.5 6.3 6.1 36.1 80.8 72.5 52.9 41.6 6.3 6.1 6.3
136 2010 6.3 5.7 3.5 6.1 24.3 57.1 32.7 0.0 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 277 Standard Deviation: 6.4
Trend in Annual Runoff (slope):  -73
Discharge is estimated via a rating equation directly from the remote sensing data (M/C ratio) shown below.
Green line records upwelling microwave emission from within 5 km radius of a calbration land target. 
Explanation:   Blue line is emission from within 5 km radius of the measurement target centered over the river.
Brown line is their ratio (M/C; "HR" in Brakenridge et al 2007; 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 using available ground-based discharge information.
GoogleEarth View of Measurement Site
Return
Estimated
Disharge
Data
Date m3/sec
22-Jul-02 16089
23-Jul-02 16089
24-Jul-02 17956
25-Jul-02 13454
26-Jul-02 12524
27-Jul-02 9958
28-Jul-02 9436
29-Jul-02 11163
30-Jul-02 9356
31-Jul-02 9809
1-Aug-02 8759
2-Aug-02 6168
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 19279
10-Aug-02 12670
11-Aug-02 14262
12-Aug-02 12632
13-Aug-02 10464
14-Aug-02 12218
15-Aug-02 12316
16-Aug-02 14414
17-Aug-02 14164
18-Aug-02 14123
19-Aug-02 7965
20-Aug-02 9100
21-Aug-02 9482
22-Aug-02 7661
23-Aug-02 10124
24-Aug-02 7733
25-Aug-02 8877
26-Aug-02 8777
27-Aug-02 10442
28-Aug-02 8749
29-Aug-02 7940
30-Aug-02 9426
31-Aug-02 7668
1-Sep-02 10409
2-Sep-02 11238
3-Sep-02 10758
4-Sep-02 12185
5-Sep-02 11079
6-Sep-02 7583
7-Sep-02 7971
8-Sep-02 8010
9-Sep-02 8600
10-Sep-02 12127
11-Sep-02 10744
12-Sep-02 10727
13-Sep-02 8549
14-Sep-02 5173
15-Sep-02 3558
16-Sep-02 1714
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 6204
22-Sep-02 4579
23-Sep-02 4290
24-Sep-02 3398
25-Sep-02 6046
26-Sep-02 7309
27-Sep-02 7586
28-Sep-02 6369
29-Sep-02 5604
30-Sep-02 7215
1-Oct-02 8624
2-Oct-02 6419
3-Oct-02 5472
4-Oct-02 4877
5-Oct-02 4336
6-Oct-02 4856
7-Oct-02 4295
8-Oct-02 3272
9-Oct-02 1714
10-Oct-02 2377
11-Oct-02 1714
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