Site ID:

237

Lat.

13.8448

Cambodia

Preah Vihear

River:

Sen

Long.

104.8285

Site name:

Bahal

Contributing area:

4844

km2

Ratio to Comparison Station:

0.41

Latest measurement:

10-Nov-09

Mean annual runoff:

148

(2003-2008)

Hydrologic status:

Normal flow

Total runoff this year:

151

Latest M/C ratio:

1.01

Seven day total:

Estimated current discharge:

m3/sec

Percent of mean 7-day total:

117.0

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

Ice-cover determination:

5 yr recurrence flood:

127

m3/sec

(from Log Pearson III analysis)

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

118

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

2002

no data

9.3

24.5

31.0

10.7

9.3

121

2003

9.3

7.5

11.2

10.1

10.8

11.0

10.9

11.8

10.9

7.6

10.0

123

2004

8.3

8.7

10.5

8.3

9.7

11.1

10.2

17.7

9.4

10.3

8.5

9.9

136

2005

8.9

7.7

12.5

13.2

12.8

10.9

9.7

21.8

11.0

9.8

10.2

141

2006

8.3

7.8

10.1

11.0

9.9

9.2

11.3

13.9

25.0

34.7

0.0

163

2007

9.3

8.4

14.6

12.1

13.5

8.4

9.9

33.6

21.7

12.2

10.1

9.6

151

2008

9.0

7.9

11.8

13.0

11.0

10.4

10.7

15.6

31.2

11.4

9.4

10.2

194

2009

10.4

7.9

10.9

16.7

16.3

10.7

25.2

16.4

37.0

37.8

4.9

0.0

2010

0.0

Mean Annual Runoff (mm):

Standard Deviation:

Trend in Annual Runoff (slope)

76.8

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