Site ID: 235 Lat. 13.6109 Cambodia Batdambang
River: O Rontens Banb Long. 103.3365
Site name: Phumi Srah Chhuk Contributing area: 307 km2 Ratio to Comparison Station: 0.00
Latest measurement: 29-Jul-10 Mean annual runoff: 124 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 40.1 mm
Latest M/C ratio: 1.12 Seven day total: 1.7 mm
Estimated current discharge: 1 m3/sec Percent of mean 7-day total: 146.7 % (today's value compared to mean for same period, 2003-2009)
Ice-cover determination: 5 yr recurrence flood: 10 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 9 m3/sec (from Gumbel Extreme Value analysis)
Comparison Station Information:  Pakse (2469260)           Contributing Area:   sq mi 536010 sq km
(Data from this gaging station are used for the calibration to discharge, with an adjustment for different contributing areas)
Notes: Calibration to nearby ground station has not yet been accomplished.
Discharge and runoff, based on satellite remote sensing (NASA AMSR-E data)
(For U.S, sites, nearby ground station discharge may also be shown)
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
122 2002 no data no data no data no data no data no data no data 6.0 42.9 58.3 12.2 2.5
111 2003 1.1 0.9 2.9 11.1 18.1 5.8 20.5 12.3 13.3 25.4 -0.9 1.0
134 2004 1.3 1.8 1.7 9.1 8.0 26.8 12.8 35.9 31.8 7.4 -1.8 -1.1
87 2005 -1.3 -1.8 0.4 7.2 11.3 25.1 5.5 6.6 4.2 19.0 8.1 3.0
118 2006 0.8 0.5 0.1 4.7 8.3 10.9 21.0 13.0 12.3 46.2 0.0 0.0
128 2007 3.6 -0.2 1.0 2.1 36.4 23.5 15.7 0.8 5.2 19.2 17.6 3.2
154 2008 2.5 1.1 1.5 3.3 15.1 12.5 3.0 4.6 26.5 52.5 20.9 10.6
137 2009 5.5 0.5 2.0 5.9 9.5 5.3 2.4 0.7 23.2 52.1 23.0 6.9
40 2010 2.6 0.7 0.6 1.6 4.7 18.4 11.5 0.1 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 124 Standard Deviation: 6.4
Trend in Annual Runoff (slope):  5.9
Discharge is estimated via a rating equation directly from the remote sensing data (M/C ratio) shown below.
Explanation:   Green line records upwelling microwave emission from within 5 km radius of a calbration land target; blue line is emission from within 5 km radious of the measurement target centered over the river.
Brown line is their ratio (M/C; scale on right) and is used to estimate river discharge via a rating equation.
Rating equations are being developed and applied on an individual basis. For calibration status, see "notes" entry, above.
GoogleEarth View of Measurement Site
Return
Estimated
Disharge
Data
Date m3/sec
22-Jul-02 0
23-Jul-02 0
24-Jul-02 0
25-Jul-02 1
26-Jul-02 1
27-Jul-02 0
28-Jul-02 0
29-Jul-02 0
30-Jul-02 0
31-Jul-02 0
1-Aug-02 0
2-Aug-02
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 0
10-Aug-02 0
11-Aug-02 0
12-Aug-02 0
13-Aug-02 0
14-Aug-02 0
15-Aug-02 0
16-Aug-02 0
17-Aug-02 0
18-Aug-02 0
19-Aug-02 0
20-Aug-02 0
21-Aug-02 0
22-Aug-02 0
23-Aug-02 1
24-Aug-02 1
25-Aug-02 2
26-Aug-02 2
27-Aug-02 3
28-Aug-02 3
29-Aug-02 4
30-Aug-02 3
31-Aug-02 3
1-Sep-02 3
2-Sep-02 2
3-Sep-02 5
4-Sep-02 5
5-Sep-02 7
6-Sep-02 6
7-Sep-02 5
8-Sep-02 4
9-Sep-02 3
10-Sep-02 2
11-Sep-02 2
12-Sep-02 3
13-Sep-02 3
14-Sep-02 5
15-Sep-02 5
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 10
22-Sep-02 9
23-Sep-02 9
24-Sep-02 9
25-Sep-02 9
26-Sep-02 9
27-Sep-02 9
28-Sep-02 9
29-Sep-02 9
30-Sep-02 9
1-Oct-02 9
2-Oct-02 9
3-Oct-02 9
4-Oct-02 9
5-Oct-02 9
6-Oct-02 9
7-Oct-02 9
8-Oct-02 8
9-Oct-02 8
10-Oct-02 8
11-Oct-02 8
12-Oct-02 8
13-Oct-02 8
14-Oct-02 8
15-Oct-02 7
16-Oct-02 7
17-Oct-02 7
18-Oct-02 6
19-Oct-02 6
20-Oct-02 6
21-Oct-02 6
22-Oct-02 6
23-Oct-02 4
24-Oct-02 4
25-Oct-02 4
26-Oct-02 4
27-Oct-02 4
28-Oct-02 4
29-Oct-02 4
30-Oct-02 4
31-Oct-02 3
1-Nov-02 3
2-Nov-02 3
3-Nov-02 3
4-Nov-02 3
5-Nov-02 3
6-Nov-02 3
7-Nov-02 3
8-Nov-02 2
9-Nov-02 2
10-Nov-02 2
11-Nov-02 2
12-Nov-02 2
13-Nov-02 1
14-Nov-02 1
15-Nov-02 1
16-Nov-02 1
17-Nov-02 1
18-Nov-02 1
19-Nov-02 1
20-Nov-02 1
21-Nov-02 1
22-Nov-02 1
23-Nov-02 1
24-Nov-02 1
25-Nov-02 1
26-Nov-02 0
27-Nov-02 1
28-Nov-02 1
29-Nov-02 1
30-Nov-02 1
1-Dec-02 0
2-Dec-02 0
3-Dec-02 0
4-Dec-02 0
5-Dec-02 0
6-Dec-02 0
7-Dec-02 0
8-Dec-02 0
9-Dec-02 0
10-Dec-02 0
11-Dec-02 0
12-Dec-02 1
13-Dec-02 1
14-Dec-02 1
15-Dec-02 1
16-Dec-02 1
17-Dec-02 0
18-Dec-02 0
19-Dec-02 0
20-Dec-02 0
21-Dec-02 0
22-Dec-02 0
23-Dec-02 0
24-Dec-02 0
25-Dec-02 0
26-Dec-02 0
27-Dec-02 0
28-Dec-02 0
29-Dec-02 0
30-Dec-02 0
31-Dec-02 0
1-Jan-03 0
2-Jan-03 0
3-Jan-03 0
4-Jan-03 0
5-Jan-03 0
6-Jan-03 0
7-Jan-03 0
8-Jan-03 0
9-Jan-03 0
10-Jan-03 0
11-Jan-03 0
12-Jan-03 0
13-Jan-03 0
14-Jan-03 0
15-Jan-03 0
16-Jan-03 0
17-Jan-03 0
18-Jan-03 0
19-Jan-03 0
20-Jan-03 0
21-Jan-03 0
22-Jan-03 0
23-Jan-03 0
24-Jan-03 0
25-Jan-03 0
26-Jan-03 0
27-Jan-03 0
28-Jan-03 0
29-Jan-03 0
30-Jan-03 0
31-Jan-03 0
1-Feb-03 0
2-Feb-03 0
3-Feb-03 0
4-Feb-03 0
5-Feb-03 0
6-Feb-03 0
7-Feb-03 0
8-Feb-03 0
9-Feb-03 0
10-Feb-03 0
11-Feb-03 0
12-Feb-03 0
13-Feb-03 0
14-Feb-03 0
15-Feb-03 0
16-Feb-03 0
17-Feb-03 0
18-Feb-03 0
19-Feb-03 0
20-Feb-03 0
21-Feb-03 0
22-Feb-03 0
23-Feb-03 0
24-Feb-03 0
25-Feb-03 0
26-Feb-03 0
27-Feb-03 0
28-Feb-03 0
1-Mar-03 0
2-Mar-03 0
3-Mar-03 0
4-Mar-03 0
5-Mar-03 0
6-Mar-03 1
7-Mar-03 1
8-Mar-03 1
9-Mar-03 0
10-Mar-03 0
11-Mar-03 0
12-Mar-03 0
13-Mar-03 0
14-Mar-03 0
15-Mar-03 0
16-Mar-03 0
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