Site ID:

535

Lat.

64.2807

USA

Alaska

River:

Yukon

Long.

-158.6767

Site name:

Kaltag

Contributing area:

723219

km2

Ratio to Comparison Station:

14.38

Latest measurement:

12-Nov-09

Mean annual runoff:

192

(2003-2007)

Hydrologic status:

Ice covered

Total runoff this year:

208

Latest M/C ratio:

0.93

Seven day total:

Estimated current discharge:

-13986

m3/sec

Percent of mean 7-day total:

282.2

(today's value compared to mean for same period, 2003-2007)

Ice-cover determination:

5 yr recurrence flood:

23784

m3/sec

(from Log Pearson III analysis)

Status Codes: 1 = Low flow, 2 = Normal flow, 3 = Flood, 4 = Major Flood

24203

m3/sec

(from Gumbel Extreme Value analysis)

Comparison Station Information:

Hughes, Alas. (4103500)

Contributing Area:

sq mi

50305

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 from a station in the region; ice-covered constant discharge of 1714 m3/sec is assumed.

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

-30

2002

no data

31.7

23.6

-27.9

-41.3

-16.3

146

2003

6.3

5.7

6.3

-7.0

-11.9

59.2

44.8

36.9

30.8

-6.2

-19.7

0.4

121

2004

6.3

5.9

6.3

-4.3

25.4

54.5

41.5

26.6

2.5

-53.4

3.4

6.3

209

2005

4.3

5.7

6.3

0.6

19.3

62.8

53.7

47.4

36.6

11.2

-16.7

-21.9

294

2006

6.3

5.7

6.3

6.1

-15.2

81.3

73.8

56.8

57.9

14.8

0.0

175

2007

6.3

5.7

6.3

6.1

-7.5

58.2

53.3

45.9

39.2

5.8

-34.3

-10.5

208

2008

6.3

5.9

6.3

6.1

-2.3

54.0

53.5

55.6

42.4

10.9

-20.3

-10.5

222

2009

6.3

5.7

6.3

-8.0

13.8

80.8

72.5

52.9

38.9

-24.1

-23.2

0.0

Mean Annual Runoff:

192

Standard Deviation:

Trend in Annual Runoff (slope)

15.83

Discharge is estimated directly via a rating equation from the remote sensing data (M/C ratio) shown below.