Site ID:

2270

Lat.

12.2702

Thailand

Prachuap Khiri Khan

River:

Pran Buri

Long.

99.9106

Site name:

Ban Don Yai Nu

Contributing area:

468

km2

Ratio to Comparison Station:

0.04

Latest measurement:

6-Nov-09

Mean annual runoff:

471

(2003-2008)

Hydrologic status:

Normal flow

Total runoff this year:

474

Latest M/C ratio:

1.40

Seven day total:

Estimated current discharge:

m3/sec

Percent of mean 7-day total:

88.2

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

Ice-cover determination:

5 yr recurrence flood:

m3/sec

(from Log Pearson III analysis)

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

m3/sec

(from Gumbel Extreme Value analysis)

Comparison Station Information:

Srinagarind Dam (2964999)

Contributing Area:

sq mi

11915

sq km

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

Notes:

Discharge calibration is based on comparision of monthly means, minima, and maxima from an ground comparision station in the region with adjustment for different contributing areas

Discharge and runoff, based on satellite remote sensing (NASA AMSR-E data)

UNIDENTIFIED PROBLEMS WITH EARLIER PART OF RECORD

(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

237

2002

no data

45.4

41.6

48.0

47.2

54.4

589

2003

43.7

43.3

49.1

54.2

53.6

47.5

54.9

58.3

51.2

52.9

36.4

43.9

503

2004

43.6

29.5

54.2

35.5

41.3

44.4

50.7

49.0

46.9

40.4

35.6

32.0

519

2005

27.8

25.9

55.2

46.8

42.9

53.9

55.4

49.0

40.1

44.6

38.0

39.9

378

2006

38.4

30.9

50.1

36.1

36.2

40.0

34.6

36.6

36.3

39.0

0.0

514

2007

37.0

32.1

47.4

38.9

55.9

53.1

34.7

44.4

51.8

39.4

40.6

38.9

474

2008

50.3

38.4

44.5

41.9

40.8

31.2

30.3

40.7

32.4

36.6

43.8

43.0

381

2009

48.6

41.0

39.7

36.6

35.2

39.1

30.7

37.5

31.9

29.6

11.1

0.0

Mean Annual Runoff:

Standard Deviation:

Trend in Annual Runoff (slope)

21.53

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