Site ID: 100 Lat. 62.1430 USA Alaska
River: Yukon Long. -159.7474
Site name: Holy Cross Contributing area: 772930 km2 Ratio to Comparison Station: 1.44
Latest measurement: 31-Jul-10 Mean annual runoff: 20 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 8.8 mm
Latest M/C ratio: 1.27 Seven day total: 0.6 mm
Estimated current discharge: 664 m3/sec Percent of mean 7-day total: 75.7 % (today's value compared to mean for same period, 2003-2009)
Ice-cover determination: 5 yr recurrence flood: 3568 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 3390 m3/sec (from Gumbel Extreme Value analysis)
Comparison Station Information:  Pakse (2469260)           Contributing Area:   sq mi 536010 sq km
(Data from this gaging station are used for the calibration to discharge, with an adjustment for different contributing areas)
Notes: Calibration to nearby ground station 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
6 2002 no data no data no data no data no data no data no data 1.9 2.0 1.6 0.2 0.0
14 2003 0.0 0.0 0.0 0.0 1.5 3.5 2.5 2.3 2.3 1.3 0.3 0.0
17 2004 0.1 0.0 0.4 0.0 2.4 6.1 2.9 2.4 1.5 1.2 0.0 0.0
29 2005 0.0 0.2 0.0 0.0 5.1 10.4 4.3 3.4 3.1 2.0 0.2 0.3
23 2006 0.1 0.2 0.0 0.0 2.0 7.5 3.8 3.0 3.4 2.7 0.0 0.0
15 2007 0.1 0.0 0.0 0.0 1.6 3.1 3.0 3.2 3.0 0.9 0.0 0.0
17 2008 0.0 0.0 0.1 0.0 2.4 4.4 3.1 3.3 2.8 0.3 0.0 0.0
28 2009 0.0 0.0 0.1 0.2 3.2 10.3 4.8 3.2 3.0 1.9 0.9 0.1
9 2010 0.0 0.1 0.0 0.1 1.9 3.2 3.3 0.2 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 20 Standard Deviation: 6.4
Trend in Annual Runoff (slope):  5.9
Discharge is estimated via a rating equation directly from the remote sensing data (M/C ratio) shown below.
Explanation:   Green line records upwelling microwave emission from within 5 km radius of a calbration land target; blue line is emission from within 5 km radious of the measurement target 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.
GoogleEarth View of Measurement Site
Return
Estimated
Disharge
Data
Date m3/sec
22-Jul-02 976
23-Jul-02 976
24-Jul-02 1038
25-Jul-02 885
26-Jul-02 824
27-Jul-02 845
28-Jul-02 733
29-Jul-02 862
30-Jul-02 872
31-Jul-02 848
1-Aug-02 943
2-Aug-02 770
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 831
10-Aug-02 760
11-Aug-02 796
12-Aug-02 756
13-Aug-02 722
14-Aug-02 810
15-Aug-02 757
16-Aug-02 857
17-Aug-02 841
18-Aug-02 679
19-Aug-02 625
20-Aug-02 547
21-Aug-02 552
22-Aug-02 542
23-Aug-02 523
24-Aug-02 535
25-Aug-02 455
26-Aug-02 498
27-Aug-02 614
28-Aug-02 647
29-Aug-02 697
30-Aug-02 756
31-Aug-02 690
1-Sep-02 806
2-Sep-02 712
3-Sep-02 618
4-Sep-02 780
5-Sep-02 695
6-Sep-02 655
7-Sep-02 718
8-Sep-02 559
9-Sep-02 523
10-Sep-02 681
11-Sep-02 685
12-Sep-02 661
13-Sep-02 672
14-Sep-02 676
15-Sep-02 615
16-Sep-02 617
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 730
22-Sep-02 571
23-Sep-02 600
24-Sep-02 585
25-Sep-02 726
26-Sep-02 888
27-Sep-02 912
28-Sep-02 898
29-Sep-02 791
30-Sep-02 677
1-Oct-02 590
2-Oct-02 566
3-Oct-02 655
4-Oct-02 731
5-Oct-02 833
6-Oct-02 864
7-Oct-02 788
8-Oct-02 671
9-Oct-02 676
10-Oct-02 686
11-Oct-02 607
12-Oct-02 675
13-Oct-02 732
14-Oct-02 652
15-Oct-02 706
16-Oct-02 716
17-Oct-02 653
18-Oct-02 566
19-Oct-02 391
20-Oct-02 212
21-Oct-02 165
22-Oct-02 3
23-Oct-02 3
24-Oct-02 3
25-Oct-02 3
26-Oct-02 22
27-Oct-02 61
28-Oct-02 189
29-Oct-02 279
30-Oct-02 201
31-Oct-02 249
1-Nov-02 245
2-Nov-02 223
3-Nov-02 288
4-Nov-02 211
5-Nov-02 282
6-Nov-02 193
7-Nov-02 63
8-Nov-02 52
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