Site ID: 227 Lat. 14.0019 Cambodia Preah Vihear
River: Mekong Long. 105.8704
Site name: Phumi Kampong Sralau Contributing area: 555843 km2 Ratio to Comparison Station: 1.04
Latest measurement: 29-Jul-10 Mean annual runoff: 85 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 58.2 mm
Latest M/C ratio: 1.48 Seven day total: 1.3 mm
Estimated current discharge: 1581 m3/sec Percent of mean 7-day total: 62.4 % (today's value compared to mean for same period, 2003-2009)
Ice-cover determination: 5 yr recurrence flood: 4018 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 3913 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
20 2002 no data no data no data no data no data no data no data 4.0 2.9 5.3 4.0 4.2
57 2003 4.8 5.0 4.6 5.0 5.6 6.1 5.8 5.4 4.7 3.7 3.0 3.6
39 2004 3.5 3.7 4.0 2.3 3.3 4.2 4.9 3.9 3.5 1.6 1.9 1.7
94 2005 2.1 4.1 7.0 8.4 9.5 7.5 8.7 11.0 9.6 9.5 8.3 8.1
86 2006 8.0 6.6 8.1 7.0 8.4 9.7 11.2 9.2 7.9 9.6 0.0 0.0
106 2007 7.8 8.4 8.6 7.3 10.9 9.1 11.4 8.5 8.1 9.1 9.0 7.9
106 2008 8.8 8.0 8.2 7.8 10.2 11.7 10.5 8.7 8.2 6.6 9.2 8.0
105 2009 8.5 8.2 7.3 8.3 10.0 12.1 10.6 8.2 6.5 7.7 8.8 9.0
58 2010 7.8 8.1 8.6 9.0 8.7 8.4 7.3 0.3 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 85 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 3183
23-Jul-02 3183
24-Jul-02 3142
25-Jul-02 3612
26-Jul-02 2565
27-Jul-02 2565
28-Jul-02 1504
29-Jul-02 937
30-Jul-02 446
31-Jul-02 446
1-Aug-02 233
2-Aug-02 370
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 2179
10-Aug-02 2179
11-Aug-02 1181
12-Aug-02 1181
13-Aug-02 15
14-Aug-02 10
15-Aug-02 239
16-Aug-02 647
17-Aug-02 985
18-Aug-02 1400
19-Aug-02 1511
20-Aug-02 737
21-Aug-02 803
22-Aug-02 1013
23-Aug-02 1085
24-Aug-02 1272
25-Aug-02 1542
26-Aug-02 1638
27-Aug-02 1202
28-Aug-02 1202
29-Aug-02 392
30-Aug-02 1155
31-Aug-02 1373
1-Sep-02 1457
2-Sep-02 1879
3-Sep-02 1396
4-Sep-02 1602
5-Sep-02 450
6-Sep-02 450
7-Sep-02 48
8-Sep-02 187
9-Sep-02 502
10-Sep-02 775
11-Sep-02 912
12-Sep-02 1097
13-Sep-02 1097
14-Sep-02 835
15-Sep-02 835
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 3
22-Sep-02 3
23-Sep-02 392
24-Sep-02 393
25-Sep-02 632
26-Sep-02 673
27-Sep-02 570
28-Sep-02 824
29-Sep-02 824
30-Sep-02 672
1-Oct-02 1200
2-Oct-02 1056
3-Oct-02 1044
4-Oct-02 1252
5-Oct-02 672
6-Oct-02 775
7-Oct-02 782
8-Oct-02 782
9-Oct-02 573
10-Oct-02 1214
11-Oct-02 1313
12-Oct-02 1516
13-Oct-02 2292
14-Oct-02 1607
15-Oct-02 1607
16-Oct-02 899
17-Oct-02 841
18-Oct-02 604
19-Oct-02 785
20-Oct-02 882
21-Oct-02 1233
22-Oct-02 1601
23-Oct-02 1758
24-Oct-02 1758
25-Oct-02 533
26-Oct-02 1417
27-Oct-02 1390
28-Oct-02 1061
29-Oct-02 1354
30-Oct-02 203
31-Oct-02 203
1-Nov-02 395
2-Nov-02 301
3-Nov-02 483
4-Nov-02 642
5-Nov-02 567
6-Nov-02 873
7-Nov-02 1069
8-Nov-02 955
9-Nov-02 955
10-Nov-02 777
11-Nov-02 995
12-Nov-02 1037
13-Nov-02 1183
14-Nov-02 1471
15-Nov-02 1004
16-Nov-02 1004
17-Nov-02 322
18-Nov-02 434
19-Nov-02 341
20-Nov-02 811
21-Nov-02 1070
22-Nov-02 1409
23-Nov-02 2061
24-Nov-02 753
25-Nov-02 753
26-Nov-02 541
27-Nov-02 609
28-Nov-02 966
29-Nov-02 1076
30-Nov-02 1018
1-Dec-02 883
2-Dec-02 883
3-Dec-02 514
4-Dec-02 1083
5-Dec-02 1170
6-Dec-02 1369
7-Dec-02 1680
8-Dec-02 1435
9-Dec-02 1822
10-Dec-02 784
11-Dec-02 784
12-Dec-02 72
13-Dec-02 300
14-Dec-02 425
15-Dec-02 533
16-Dec-02 777
17-Dec-02 812
18-Dec-02 812
19-Dec-02 750
20-Dec-02 779
21-Dec-02 535
22-Dec-02 777
23-Dec-02 824
24-Dec-02 635
25-Dec-02 896
26-Dec-02 613
27-Dec-02 613
28-Dec-02 917
29-Dec-02 1195
30-Dec-02 1315
31-Dec-02 945
1-Jan-03 977
2-Jan-03 657
3-Jan-03 657
4-Jan-03 814
5-Jan-03 711
6-Jan-03 494
7-Jan-03 681
8-Jan-03 725
9-Jan-03 1169
10-Jan-03 1559
11-Jan-03 1299
12-Jan-03 1299
13-Jan-03 844
14-Jan-03 1076
15-Jan-03 1221
16-Jan-03 1339
17-Jan-03 1583
18-Jan-03 774
19-Jan-03 774
20-Jan-03 492
21-Jan-03 698
22-Jan-03 937
23-Jan-03 1207
24-Jan-03 1293
25-Jan-03 1500
26-Jan-03 1938
27-Jan-03 1259
28-Jan-03 1259
29-Jan-03 381
30-Jan-03 759
31-Jan-03 736
1-Feb-03 801
2-Feb-03 1255
3-Feb-03 1409
4-Feb-03 1409
5-Feb-03 1386
6-Feb-03 1443
7-Feb-03 1236
8-Feb-03 1036
9-Feb-03 1092
10-Feb-03 1072
11-Feb-03 1072
12-Feb-03 1035
13-Feb-03 1035
14-Feb-03 785
15-Feb-03 1089
16-Feb-03 1389
17-Feb-03 1292
18-Feb-03 1422
19-Feb-03 987
20-Feb-03 987
21-Feb-03 882
22-Feb-03 1197
23-Feb-03 1019
24-Feb-03 1064
25-Feb-03 1125
26-Feb-03 1030
27-Feb-03 1390
28-Feb-03 984
1-Mar-03 984
2-Mar-03 345
3-Mar-03 577
4-Mar-03 642
5-Mar-03 1029
6-Mar-03 1466
7-Mar-03 1892
8-Mar-03 1892
9-Mar-03 913
10-Mar-03 1113
11-Mar-03 951
12-Mar-03 938
13-Mar-03 947
14-Mar-03 820
15-Mar-03 915
16-Mar-03 665
17-Mar-03 665
18-Mar-03