Site ID:

251

Lat.

19.5472

Thailand

Chiang Rai

River:

Nam Ing

Long.

100.1637

Site name:

Thoeng

Contributing area:

3250

km2

Ratio to Comparison Station:

0.14

Latest measurement:

9-Nov-09

Mean annual runoff:

1109

(2003-2007)

Hydrologic status:

Normal flow

Total runoff this year:

1646

Latest M/C ratio:

1.10

Seven day total:

Estimated current discharge:

m3/sec

Percent of mean 7-day total:

19.2

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

Ice-cover determination:

5 yr recurrence flood:

1734

m3/sec

(from Log Pearson III analysis)

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

1740

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

215

2002

no data

20.3

166.3

2.7

6.3

19.0

856

2003

2.7

2.5

3.0

2.6

3.1

37.9

419.2

233.7

139.4

6.6

2.2

2.7

1438

2004

2.7

2.6

7.2

90.1

194.4

659.7

289.7

155.5

28.3

2.7

2.6

2.7

807

2005

2.7

2.5

2.7

24.8

43.6

80.4

163.8

342.5

18.7

119.9

2.6

2.7

703

2006

8.8

2.9

3.8

27.6

148.9

349.7

94.1

53.4

11.4

2.7

0.0

1740

2007

6.0

2.5

71.0

78.4

840.3

359.1

296.5

3.1

74.6

2.7

2.6

3.1

1646

2008

8.2

3.9

2.7

4.4

138.8

716.3

581.8

125.4

56.7

2.7

2.6

2.7

1343

2009

24.5

18.7

31.8

8.6

432.4

447.6

361.9

10.6

2.6

2.7

1.1

0.0

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