Site ID: 232 Lat. 12.9616 Cambodia Kampong Thum
River: Stoung Long. 104.4757
Site name: Phumi Bat Dai Contributing area: 3861 km2 Ratio to Comparison Station: 0.32
Latest measurement: 29-Jul-10 Mean annual runoff: 167 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 25.8 mm
Latest M/C ratio: 1.40 Seven day total: 0.8 mm
Estimated current discharge: 5 m3/sec Percent of mean 7-day total: 77.0 % (today's value compared to mean for same period, 2003-2009)
Ice-cover determination: 5 yr recurrence flood: 255 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 225 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: Calibration to nearby ground station has been accomplished.
Discharge and runoff, based on satellite remote sensing (NASA AMSR-E data) Accuracy Estimate:  Good. Site is near tributary junction.
(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
110 2002 no data no data no data no data no data no data no data 6.1 21.7 67.5 10.5 3.8
50 2003 3.8 3.4 3.8 3.6 3.8 3.6 3.8 3.8 4.0 9.3 3.0 3.8
55 2004 3.8 3.5 3.8 3.6 3.8 5.2 3.8 6.9 6.1 7.3 3.6 3.8
248 2005 3.8 3.4 3.8 3.6 3.8 3.6 5.2 3.8 67.2 97.6 40.1 12.0
206 2006 3.4 2.9 3.8 3.6 3.8 3.5 6.1 33.1 61.5 84.5 0.0 0.0
145 2007 3.8 3.4 3.8 3.6 3.8 3.6 4.3 4.8 13.8 62.9 29.2 8.4
204 2008 4.1 3.5 3.8 3.6 5.4 3.4 3.8 13.1 42.8 71.6 35.3 14.1
264 2009 3.8 3.4 3.8 3.6 3.8 3.6 6.0 9.8 45.3 101.5 68.4 11.1
26 2010 3.8 3.4 3.9 3.6 3.6 3.6 3.8 0.1 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 167 Standard Deviation: 87.2
Trend in Annual Runoff (slope):  32
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.
GoogleEarth View of Measurement Site
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232.jpg
Estimated
Discharge
Date m3/sec
22-Jul-02 5
23-Jul-02 5
24-Jul-02 5
25-Jul-02 5
26-Jul-02 5
27-Jul-02 5
28-Jul-02 5
29-Jul-02 5
30-Jul-02 5
31-Jul-02 5
1-Aug-02 5
2-Aug-02
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 5
10-Aug-02 5
11-Aug-02 5
12-Aug-02 5
13-Aug-02 5
14-Aug-02 5
15-Aug-02 5
16-Aug-02 5
17-Aug-02 5
18-Aug-02 5
19-Aug-02 5
20-Aug-02 5
21-Aug-02 5
22-Aug-02 5
23-Aug-02 5
24-Aug-02 5
25-Aug-02 15
26-Aug-02 22
27-Aug-02 19
28-Aug-02 19
29-Aug-02 26
30-Aug-02 33
31-Aug-02 48
1-Sep-02 40
2-Sep-02 38
3-Sep-02 13
4-Sep-02 13
5-Sep-02 12
6-Sep-02 22
7-Sep-02 39
8-Sep-02 31
9-Sep-02 33
10-Sep-02 26
11-Sep-02 20
12-Sep-02 21
13-Sep-02 21
14-Sep-02 17
15-Sep-02 17
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 5
22-Sep-02 16
23-Sep-02 14
24-Sep-02 42
25-Sep-02 73
26-Sep-02 59
27-Sep-02 99
28-Sep-02 86
29-Sep-02 86
30-Sep-02 126
1-Oct-02 153
2-Oct-02 135
3-Oct-02 159
4-Oct-02 215
5-Oct-02 166
6-Oct-02 166
7-Oct-02 96
8-Oct-02 107
9-Oct-02 86
10-Oct-02 105
11-Oct-02 116
12-Oct-02 116
13-Oct-02 149
14-Oct-02 151
15-Oct-02 151
16-Oct-02 125
17-Oct-02 106
18-Oct-02 74
19-Oct-02 65
20-Oct-02 60
21-Oct-02 41
22-Oct-02 41
23-Oct-02 31
24-Oct-02 55
25-Oct-02 55
26-Oct-02 33
27-Oct-02 34
28-Oct-02 25
29-Oct-02 21
30-Oct-02 89
31-Oct-02 89
1-Nov-02 5
2-Nov-02 25
3-Nov-02 7
4-Nov-02 16
5-Nov-02 87
6-Nov-02 48
7-Nov-02 48
8-Nov-02 20
9-Nov-02 17
10-Nov-02 5
11-Nov-02 5
12-Nov-02 5
13-Nov-02 12
14-Nov-02 25
15-Nov-02 29
16-Nov-02 29
17-Nov-02 10
18-Nov-02 5
19-Nov-02 5
20-Nov-02 5
21-Nov-02 5
22-Nov-02 5
23-Nov-02 5
24-Nov-02 9
25-Nov-02 5
26-Nov-02 5
27-Nov-02 5
28-Nov-02 5
29-Nov-02 5
30-Nov-02 5
1-Dec-02 5
2-Dec-02 5
3-Dec-02 5
4-Dec-02 5
5-Dec-02 5
6-Dec-02 5
7-Dec-02 5
8-Dec-02 5
9-Dec-02 5
10-Dec-02 5
11-Dec-02 5
12-Dec-02 5
13-Dec-02 5
14-Dec-02 5
15-Dec-02 5
16-Dec-02 5
17-Dec-02 5
18-Dec-02 5
19-Dec-02 5
20-Dec-02 5
21-Dec-02 5
22-Dec-02 5
23-Dec-02 5
24-Dec-02 5
25-Dec-02 5
26-Dec-02 5
27-Dec-02 5
28-Dec-02 5
29-Dec-02 5
30-Dec-02 5
31-Dec-02 5
1-Jan-03 5
2-Jan-03 5
3-Jan-03 5
4-Jan-03 5
5-Jan-03 5
6-Jan-03 5
7-Jan-03 5
8-Jan-03 5
9-Jan-03 5
10-Jan-03 5
11-Jan-03 5
12-Jan-03 5
13-Jan-03 5
14-Jan-03 5
15-Jan-03 5
16-Jan-03 5
17-Jan-03 5
18-Jan-03 5
19-Jan-03 5
20-Jan-03 5
21-Jan-03 5
22-Jan-03 5
23-Jan-03 5
24-Jan-03 5
25-Jan-03 5
26-Jan-03 5
27-Jan-03 5
28-Jan-03 5
29-Jan-03 5
30-Jan-03 5
31-Jan-03 5
1-Feb-03 5
2-Feb-03 5
3-Feb-03 5
4-Feb-03 5
5-Feb-03 5
6-Feb-03 5
7-Feb-03 5
8-Feb-03 5
9-Feb-03 5
10-Feb-03 5
11-Feb-03 5
12-Feb-03 5
13-Feb-03 5
14-Feb-03 5
15-Feb-03 5
16-Feb-03 5
17-Feb-03 5
18-Feb-03 5
19-Feb-03 5
20-Feb-03 5
21-Feb-03 5
22-Feb-03 5
23-Feb-03 5
24-Feb-03 5
25-Feb-03 5
26-Feb-03 5
27-Feb-03 5
28-Feb-03 5
1-Mar-03 5
2-Mar-03 5
3-Mar-03 5
4-Mar-03 5
5-Mar-03 5
6-Mar-03 5
7-Mar-03 5
8-Mar-03 5
9-Mar-03 5
10-Mar-03 5
11-Mar-03 5
12-Mar-03 5
13-Mar-03 5
14-Mar-03 5
15-Mar-03 5
16-Mar-03 5
17-Mar-03 5
18-Mar-03 5
19-Mar-03 5
20-Mar-03 5
21-Mar-03 5
22-Mar-03 5