Site ID:

2166

Lat.

18.7526

Vietnam

Nghe An

River:

Long.

105.3535

Site name:

Yen Thuong

Contributing area:

23230

km2

Ratio to Comparison Station:

1.00

Latest measurement:

9-Jan-10

Mean annual runoff:

630

(2003-2007)

Hydrologic status:

Normal flow

Total runoff this year:

860

Latest M/C ratio:

1.31

Seven day total:

Estimated current discharge:

498

m3/sec

Percent of mean 7-day total:

109.6

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

Ice-cover determination:

5 yr recurrence flood:

2606

m3/sec

(from Log Pearson III analysis)

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

2537

m3/sec

(from Gumbel Extreme Value analysis)

Comparison Station Information:

Tokwe Confluence D/s C/s (1495240)

Contributing Area:

7280

sq mi

23237

sq km

(Data from this gaging station are used for the calibration to discharge, with an adjustment for different contributing areas)

Notes:

Comparison station is placeholder, only; this site is not yet calibrated to actual discharge

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

271

2002

no data

11.7

66.5

56.2

59.2

76.9

526

2003

131.4

100.8

19.4

2.0

32.2

66.6

0.4

2.1

52.9

59.8

13.0

45.7

508

2004

72.3

124.4

48.6

1.9

4.7

81.6

22.2

3.2

23.6

30.6

29.9

64.7

723

2005

77.3

77.5

19.4

0.9

10.4

81.1

21.3

24.9

131.2

149.9

72.0

56.7

590

2006

93.3

104.2

33.4

3.5

29.3

85.7

9.5

35.0

82.0

113.8

0.0

803

2007

111.0

113.0

13.0

1.2

53.2

96.6

1.9

29.1

63.0

154.1

106.1

61.1

860

2008

107.1

126.7

126.4

14.2

2.8

62.0

36.0

8.6

46.6

110.1

147.1

72.2

648

2009

124.6

14.0

1.6

39.3

80.3

3.1

12.1

55.9

111.5

40.7

39.8

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