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: 29-Jul-10 Mean annual runoff: 120 mm (2003-2009)
Hydrologic status: 1 Low flow Total runoff this year (2010): 28.9 mm
Latest M/C ratio: 1.00 Seven day total: 0.3 mm
Estimated current discharge: 4 m3/sec Percent of mean 7-day total: 10.9 % (today's value compared to mean for same period, 2003-2009)
Ice-cover determination: 5 yr recurrence flood: 135 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 134 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
(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
107 2002 no data no data no data no data no data no data no data 4.6 31.9 40.2 19.6 10.3
94 2003 7.6 5.2 5.4 5.9 9.2 5.0 3.8 7.3 7.7 24.2 7.4 5.8
101 2004 5.8 5.1 3.9 7.6 4.1 12.8 10.3 10.9 15.2 14.5 6.2 4.8
81 2005 4.6 3.8 3.5 1.6 7.9 13.3 3.9 5.4 6.7 11.8 9.7 8.5
103 2006 6.8 3.7 4.8 4.6 1.6 3.2 15.5 22.6 14.9 24.9 0.0 0.0
219 2007 7.1 4.1 3.5 2.6 31.5 35.5 30.5 20.4 13.2 24.2 24.9 21.8
118 2008 10.5 6.0 5.3 3.5 8.2 6.4 1.4 1.5 11.6 29.2 18.5 16.3
123 2009 11.9 6.8 5.8 6.6 8.3 9.0 2.5 2.8 10.7 32.8 16.4 9.4
29 2010 7.8 6.4 5.7 1.5 3.9 1.8 1.8 0.0 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 120 Standard Deviation: 46.0
Trend in Annual Runoff (slope):  9.1
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
234.jpg
Return
Estimated
Discharge
Date m3/sec
22-Jul-02 11
23-Jul-02 11
24-Jul-02 14
25-Jul-02 14
26-Jul-02 13
27-Jul-02 11
28-Jul-02 9
29-Jul-02 10
30-Jul-02 10
31-Jul-02 11
1-Aug-02 12
2-Aug-02
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 15
10-Aug-02 15
11-Aug-02 11
12-Aug-02 11
13-Aug-02 8
14-Aug-02 7
15-Aug-02 7
16-Aug-02 5
17-Aug-02 5
18-Aug-02 4
19-Aug-02 4
20-Aug-02 6
21-Aug-02 4
22-Aug-02 6
23-Aug-02 13
24-Aug-02 14
25-Aug-02 30
26-Aug-02 30
27-Aug-02 40
28-Aug-02 40
29-Aug-02 41
30-Aug-02 45
31-Aug-02 44
1-Sep-02 51
2-Sep-02 58
3-Sep-02 76
4-Sep-02 76
5-Sep-02 95
6-Sep-02 103
7-Sep-02 107
8-Sep-02 101
9-Sep-02 104
10-Sep-02 66
11-Sep-02 66
12-Sep-02 85
13-Sep-02 85
14-Sep-02 128
15-Sep-02 128
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 111
22-Sep-02 132
23-Sep-02 132
24-Sep-02 151
25-Sep-02 174
26-Sep-02 182
27-Sep-02 182
28-Sep-02 160
29-Sep-02 165
30-Sep-02 158
1-Oct-02 156
2-Oct-02 158
3-Oct-02 156
4-Oct-02 159
5-Oct-02 173
6-Oct-02 173
7-Oct-02 165
8-Oct-02 171
9-Oct-02 167
10-Oct-02 172
11-Oct-02 183
12-Oct-02 154
13-Oct-02 154
14-Oct-02 136
15-Oct-02 135
16-Oct-02 127
17-Oct-02 116
18-Oct-02 106
19-Oct-02 84
20-Oct-02 74
21-Oct-02 70
22-Oct-02 70
23-Oct-02 56
24-Oct-02 61
25-Oct-02 55
26-Oct-02 55
27-Oct-02 64
28-Oct-02 67
29-Oct-02 67
30-Oct-02 73
31-Oct-02 72
1-Nov-02 75
2-Nov-02 78
3-Nov-02 81
4-Nov-02 97
5-Nov-02 101
6-Nov-02 88
7-Nov-02 88
8-Nov-02 65
9-Nov-02 67
10-Nov-02 69
11-Nov-02 60
12-Nov-02 56
13-Nov-02 40
14-Nov-02 40
15-Nov-02 38
16-Nov-02 36
17-Nov-02 40
18-Nov-02 42
19-Nov-02 42
20-Nov-02 55
21-Nov-02 58
22-Nov-02 63
23-Nov-02 63
24-Nov-02 43
25-Nov-02 46
26-Nov-02 41
27-Nov-02 42
28-Nov-02 47
29-Nov-02 54
30-Nov-02 54
1-Dec-02 53
2-Dec-02 43
3-Dec-02 34
4-Dec-02 33
5-Dec-02 29
6-Dec-02 30
7-Dec-02 27
8-Dec-02 25
9-Dec-02 25
10-Dec-02 30
11-Dec-02 29
12-Dec-02 31
13-Dec-02 29
14-Dec-02 27
15-Dec-02 29
16-Dec-02 29
17-Dec-02 26
18-Dec-02 29
19-Dec-02 26
20-Dec-02 26
21-Dec-02 28
22-Dec-02 28
23-Dec-02 30
24-Dec-02 35
25-Dec-02 35
26-Dec-02 29
27-Dec-02 29
28-Dec-02 25
29-Dec-02 26
30-Dec-02 28
31-Dec-02 26
1-Jan-03 26
2-Jan-03 26
3-Jan-03 27
4-Jan-03 28
5-Jan-03 26
6-Jan-03 26
7-Jan-03 24
8-Jan-03 21
9-Jan-03 24
10-Jan-03 24
11-Jan-03 25
12-Jan-03 26
13-Jan-03 25
14-Jan-03 26
15-Jan-03 27
16-Jan-03 23
17-Jan-03 23
18-Jan-03 19
19-Jan-03 20
20-Jan-03 19
21-Jan-03 19
22-Jan-03 20
23-Jan-03 20
24-Jan-03 20
25-Jan-03 16
26-Jan-03 16
27-Jan-03 17
28-Jan-03 17
29-Jan-03 18
30-Jan-03 19
31-Jan-03 18
1-Feb-03 19