Site ID:

259

Lat.

14.4554

Thailand

Ang Thong

River:

Chao Phraya

Long.

100.4510

Site name:

Pa Mok

Contributing area:

131692

km2

Ratio to Comparison Station:

5.67

Latest measurement:

9-Nov-09

Mean annual runoff:

179

(2003-2007)

Hydrologic status:

Flood

Total runoff this year:

251

Latest M/C ratio:

1.69

Seven day total:

Estimated current discharge:

2636

m3/sec

Percent of mean 7-day total:

110.1

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

Ice-cover determination:

5 yr recurrence flood:

4834

m3/sec

(from Log Pearson III analysis)

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

4685

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

180

2002

no data

0.7

8.1

63.7

60.3

47.4

2003

23.4

13.3

9.6

4.5

2.4

7.6

0.4

0.1

2.7

9.1

9.7

12.2

2004

9.0

10.5

11.0

7.1

4.6

7.3

1.5

0.5

3.8

11.4

7.4

11.5

272

2005

13.5

11.9

13.1

8.8

3.8

0.8

4.7

7.1

4.5

23.0

100.8

79.6

158

2006

17.4

7.7

12.5

9.4

7.1

10.2

9.6

5.7

15.2

62.6

0.0

285

2007

49.1

23.7

14.7

4.4

7.2

3.2

2.9

2.2

23.4

51.2

58.6

44.2

251

2008

39.0

15.6

11.7

18.7

15.5

0.7

0.1

0.2

18.2

52.6

37.1

41.3

204

2009

39.2

23.8

13.6

14.9

13.3

0.1

1.8

7.0

27.3

43.7

19.7

0.0

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