Site ID: 231 Lat. 12.9356 Cambodia Kampong Thum
River: Sen Long. 105.1770
Site name: Phumi Roneam Contributing area: 12440 km2 Ratio to Comparison Station: 0.02
Latest measurement: 29-Jul-10 Mean annual runoff: 599 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 142.0 mm
Latest M/C ratio: 1.24 Seven day total: 17.1 mm
Estimated current discharge: 545 m3/sec Percent of mean 7-day total: 82.5 % (today's value compared to mean for same period, 2003-2009)
Ice-cover determination: 5 yr recurrence flood: 2180 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 2074 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
311 2002 no data no data no data no data no data no data no data 46.6 180.8 82.0 0.7 0.7
157 2003 0.7 0.6 10.8 1.3 17.3 12.8 37.8 30.2 39.3 4.5 0.6 0.7
102 2004 0.7 0.7 0.7 0.7 1.8 48.2 10.0 33.0 3.3 1.6 0.7 0.7
392 2005 0.7 0.6 0.7 0.7 19.4 15.9 123.3 27.3 128.8 64.1 8.4 2.4
692 2006 0.6 0.6 0.7 35.8 38.7 36.0 134.1 128.5 145.6 171.8 0.0 0.0
1086 2007 1.3 2.7 12.2 6.8 126.8 18.7 83.9 302.0 301.2 173.5 49.9 6.7
680 2008 0.7 0.7 0.7 17.2 121.1 59.3 33.9 108.3 171.4 112.6 49.5 4.9
1084 2009 6.4 6.6 15.8 5.9 83.4 68.3 70.7 155.6 237.9 308.9 111.1 13.7
142 2010 4.5 2.3 0.7 14.2 24.4 42.3 51.3 2.3 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 599 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 3
23-Jul-02 3
24-Jul-02 60
25-Jul-02 136
26-Jul-02 14
27-Jul-02 14
28-Jul-02 3
29-Jul-02 3
30-Jul-02 3
31-Jul-02 3
1-Aug-02 3
2-Aug-02
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 175
10-Aug-02 175
11-Aug-02 278
12-Aug-02 278
13-Aug-02 840
14-Aug-02 163
15-Aug-02 238
16-Aug-02 200
17-Aug-02 3
18-Aug-02 113
19-Aug-02 32
20-Aug-02 3
21-Aug-02 3
22-Aug-02 3
23-Aug-02 190
24-Aug-02 363
25-Aug-02 407
26-Aug-02 500
27-Aug-02 686
28-Aug-02 686
29-Aug-02 522
30-Aug-02 558
31-Aug-02 286
1-Sep-02 345
2-Sep-02 581
3-Sep-02 511
4-Sep-02 455
5-Sep-02 183
6-Sep-02 343
7-Sep-02 109
8-Sep-02 966
9-Sep-02 1424
10-Sep-02 1413
11-Sep-02 2412
12-Sep-02 1209
13-Sep-02 1209
14-Sep-02 1606
15-Sep-02 1606
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 1658
22-Sep-02 1459
23-Sep-02 1267
24-Sep-02 1185
25-Sep-02 1021
26-Sep-02 1239
27-Sep-02 1396
28-Sep-02 873
29-Sep-02 873
30-Sep-02 689
1-Oct-02 723
2-Oct-02 1103
3-Oct-02 962
4-Oct-02 767
5-Oct-02 1174
6-Oct-02 1164
7-Oct-02 1306
8-Oct-02 1306
9-Oct-02 364
10-Oct-02 586
11-Oct-02 420
12-Oct-02 248
13-Oct-02 458
14-Oct-02 3
15-Oct-02 3
16-Oct-02 3
17-Oct-02 84
18-Oct-02 139
19-Oct-02 192
20-Oct-02 368
21-Oct-02 172
22-Oct-02 227
23-Oct-02 3
24-Oct-02 3
25-Oct-02 3
26-Oct-02 3
27-Oct-02 3
28-Oct-02 3
29-Oct-02 3
30-Oct-02 3
31-Oct-02 3
1-Nov-02 3
2-Nov-02 3
3-Nov-02 3
4-Nov-02 6
5-Nov-02 9
6-Nov-02 3
7-Nov-02 3
8-Nov-02 3
9-Nov-02 3
10-Nov-02 3
11-Nov-02 3
12-Nov-02 3
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1-Dec-02 3
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30-Dec-02 3
31-Dec-02 3
1-Jan-03 3
2-Jan-03 3
3-Jan-03 3
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5-Jan-03 3
6-Jan-03 3
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1-Mar-03 3
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18-Mar-03 3
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20-Mar-03 3
21-Mar-03 3
22-Mar-03 3
23-Mar-03 3
24-Mar-03 3
25-Mar-03 135
26-Mar-03 238
27-Mar-03 631
28-Mar-03 314
29-Mar-03 156
30-Mar-03 3
31-Mar-03 3
1-Apr-03 3
2-Apr-03 3
3-Apr-03 3
4-Apr-03 3
5-Apr-03 3
6-Apr-03 3
7-Apr-03 88
8-Apr-03 3
9-Apr-03 3
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1-May-03 3
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3-May-03 3