Site ID: 246 Lat. 17.2822 Laos Khammouan
River: Mekong Long. 104.8114
Site name: Muang Khammouan Contributing area: 371217 km2 Ratio to Comparison Station: 0.69
Latest measurement: 29-Jul-10 Mean annual runoff: 40 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 35.4 mm
Latest M/C ratio: 1.20 Seven day total: 1.0 mm
Estimated current discharge: 375 m3/sec Percent of mean 7-day total: 109.9 % (today's value compared to mean for same period, 2003-2009)
Ice-cover determination: 5 yr recurrence flood: 1916 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 1915 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
6 2002 no data no data no data no data no data no data no data 2.9 1.0 0.3 1.4 0.2
16 2003 0.2 1.0 1.8 1.7 1.3 1.9 3.0 2.4 1.7 0.2 0.3 0.5
10 2004 0.1 1.2 0.6 1.2 0.9 1.1 2.8 1.4 0.4 0.2 0.1 0.0
44 2005 0.1 0.0 1.9 4.9 5.2 2.7 2.7 4.3 5.5 5.4 5.0 5.9
46 2006 4.2 3.4 4.4 4.9 5.7 6.6 4.6 3.1 3.8 5.0 0.0 0.0
54 2007 4.4 3.8 3.1 3.9 3.8 10.1 5.8 2.2 3.9 3.6 4.6 4.4
62 2008 3.8 3.7 5.1 3.8 6.9 8.2 7.1 5.7 4.9 2.8 5.0 5.1
50 2009 4.5 4.6 4.8 3.8 4.8 5.1 5.4 2.7 2.2 3.3 4.1 4.8
35 2010 3.7 4.0 3.7 4.1 5.5 8.5 5.6 0.2 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 40 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-02 624
23-Jul-02 624
24-Jul-02 797
25-Jul-02 914
26-Jul-02 712
27-Jul-02 712
28-Jul-02 372
29-Jul-02 256
30-Jul-02 96
31-Jul-02 96
1-Aug-02 55
2-Aug-02
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 1354
10-Aug-02 1354
11-Aug-02 813
12-Aug-02 1062
13-Aug-02 565
14-Aug-02 555
15-Aug-02 606
16-Aug-02 177
17-Aug-02 256
18-Aug-02 3
19-Aug-02 3
20-Aug-02 131
21-Aug-02 159
22-Aug-02 167
23-Aug-02 414
24-Aug-02 417
25-Aug-02 538
26-Aug-02 882
27-Aug-02 251
28-Aug-02 570
29-Aug-02 635
30-Aug-02 554
31-Aug-02 808
1-Sep-02 599
2-Sep-02 576
3-Sep-02 393
4-Sep-02 393
5-Sep-02 157
6-Sep-02 286
7-Sep-02 51
8-Sep-02 122
9-Sep-02 59
10-Sep-02 3
11-Sep-02 143
12-Sep-02 27
13-Sep-02 27
14-Sep-02 120
15-Sep-02 120
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 3
24-Sep-02 3
25-Sep-02 194
26-Sep-02 113
27-Sep-02 376
28-Sep-02 234
29-Sep-02 234
30-Sep-02 3
1-Oct-02 3
2-Oct-02 3
3-Oct-02 3
4-Oct-02 3
5-Oct-02 46
6-Oct-02 46
7-Oct-02 3
8-Oct-02 82
9-Oct-02 68
10-Oct-02 65
11-Oct-02 175
12-Oct-02 3
13-Oct-02 3
14-Oct-02 57
15-Oct-02 57
16-Oct-02 123
17-Oct-02 153
18-Oct-02 9
19-Oct-02 122
20-Oct-02 285
21-Oct-02 23
22-Oct-02 23
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 81
2-Nov-02 173
3-Nov-02 332
4-Nov-02 445
5-Nov-02 514
6-Nov-02 779
7-Nov-02 779
8-Nov-02 387
9-Nov-02 363
10-Nov-02 82
11-Nov-02 16
12-Nov-02 54
13-Nov-02 3
14-Nov-02 3
15-Nov-02 3
16-Nov-02 107
17-Nov-02 149
18-Nov-02 182
19-Nov-02 231
20-Nov-02 42
21-Nov-02 98
22-Nov-02 234
23-Nov-02 234
24-Nov-02 131
25-Nov-02 255
26-Nov-02 3
27-Nov-02 59
28-Nov-02 185
29-Nov-02 3
30-Nov-02 3
1-Dec-02 3
2-Dec-02 3
3-Dec-02 3
4-Dec-02 3
5-Dec-02 19
6-Dec-02 3
7-Dec-02 3
8-Dec-02 3
9-Dec-02 3
10-Dec-02 3
11-Dec-02 3
12-Dec-02 21
13-Dec-02 3
14-Dec-02 3
15-Dec-02 70
16-Dec-02 237
17-Dec-02 309
18-Dec-02 309
19-Dec-02 3
20-Dec-02 3
21-Dec-02 3
22-Dec-02 3
23-Dec-02 3
24-Dec-02 3
25-Dec-02 3
26-Dec-02 3
27-Dec-02 3
28-Dec-02 3
29-Dec-02 3
30-Dec-02 3
31-Dec-02 20
1-Jan-03 217
2-Jan-03 4
3-Jan-03 4
4-Jan-03 3
5-Jan-03 3
6-Jan-03 3
7-Jan-03 57
8-Jan-03 70
9-Jan-03 3
10-Jan-03 3
11-Jan-03 3
12-Jan-03 3
13-Jan-03 3
14-Jan-03 3
15-Jan-03 3
16-Jan-03 3
17-Jan-03 3
18-Jan-03 3
19-Jan-03 3
20-Jan-03 3
21-Jan-03 23
22-Jan-03 189
23-Jan-03 10
24-Jan-03 122
25-Jan-03 3
26-Jan-03 3
27-Jan-03 12
28-Jan-03 3
29-Jan-03 3
30-Jan-03 3
31-Jan-03 3
1-Feb-03 3
2-Feb-03 94
3-Feb-03 153
4-Feb-03 153
5-Feb-03 3
6-Feb-03 3
7-Feb-03 3
8-Feb-03 3
9-Feb-03 3
10-Feb-03 229
11-Feb-03 229
12-Feb-03 335
13-Feb-03 279
14-Feb-03 36
15-Feb-03 147
16-Feb-03 143
17-Feb-03 293
18-Feb-03 564
19-Feb-03 460
20-Feb-03 460
21-Feb-03 3
22-Feb-03 122
23-Feb-03 42
24-Feb-03 210
25-Feb-03 477
26-Feb-03 3
27-Feb-03 3
28-Feb-03 3
1-Mar-03 3
2-Mar-03 3
3-Mar-03 70
4-Mar-03 48
5-Mar-03 93
6-Mar-03 319
7-Mar-03 295
8-Mar-03 295
9-Mar-03 3
10-Mar-03 46
11-Mar-03 46
12-Mar-03 156
13-Mar-03 462
14-Mar-03 377
15-Mar-03 377
16-Mar-03 3
17-Mar-03 102
18-Mar-03 108
19-Mar-03 34
20-Mar-03 168
21-Mar-03 3
22-Mar-03 3
23-Mar-03 683
24-Mar-03 708
25-Mar-03 954
26-Mar-03 718
27-Mar-03 687
28-Mar-03 232
29-Mar-03 252
30-Mar-03 146
31-Mar-03 146
1-Apr-03 101
2-Apr-03 272
3-Apr-03 423
4-Apr-03 484
5-Apr-03 651
6-Apr-03 235
7-Apr-03 3
8-Apr-03 362
9-Apr-03 362
10-Apr-03 381
11-Apr-03 540