Site ID:

234

Lat.

13.5545

Cambodia

Batdambang

River:

Mongkol Borey

Long.

103.1258

Site name:

Sisophon

Contributing area:

7801

km2

Ratio to Comparison Station:

0.66

Latest measurement:

10-Nov-09

Mean annual runoff:

149

(2003-2008)

Hydrologic status:

Normal flow

Total runoff this year:

141

Latest M/C ratio:

1.28

Seven day total:

Estimated current discharge:

m3/sec

Percent of mean 7-day total:

141.3

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

Ice-cover determination:

5 yr recurrence flood:

130

m3/sec

(from Log Pearson III analysis)

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

132

m3/sec

(from Gumbel Extreme Value analysis)

Comparison Station Information:

Ban Chot (2969082)

Contributing Area:

sq mi

11886

sq km

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

Notes:

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

109

2002

no data

6.9

31.9

40.2

19.6

10.3

110

2003

8.0

6.5

7.2

7.1

9.9

7.2

7.5

8.7

9.3

24.2

7.6

7.2

118

2004

7.3

6.7

7.2

8.5

7.2

13.8

11.3

11.0

15.2

14.5

7.7

7.2

107

2005

7.2

6.5

7.2

6.9

11.5

13.4

7.3

7.4

9.2

12.3

9.8

8.5

119

2006

7.2

5.1

7.3

7.1

6.9

15.7

22.6

14.9

24.9

0.0

231

2007

7.8

6.5

7.2

7.0

31.7

35.5

30.5

20.4

13.2

24.2

24.9

21.8

141

2008

10.5

6.7

7.3

7.0

9.4

7.7

7.2

13.7

29.2

18.5

16.3

121

2009

11.9

7.2

7.6

7.7

9.8

9.7

7.2

11.7

32.8

8.5

0.0

2010

0.0

Mean Annual Runoff (mm):

149

Standard Deviation:

Trend in Annual Runoff (slope)

4.4

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