Site ID: 91 Lat. 16.9343 Thailand Nakhon Phanom
River: Mekong Long. 104.7379
Site name: 0 Contributing area: 387047 km2 Ratio to Comparison Station: 0.72
Latest measurement: 29-Jul-10 Mean annual runoff: 26 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 17.5 mm
Latest M/C ratio: 1.10 Seven day total: 0.3 mm
Estimated current discharge: 3 m3/sec Percent of mean 7-day total: 93.6 % (today's value compared to mean for same period, 2003-2009)
Ice-cover determination: 5 yr recurrence flood: 1508 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 1529 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
12 2002 no data no data no data no data no data no data no data 4.0 3.3 2.0 1.3 1.7
12 2003 2.0 2.5 0.7 1.2 0.6 0.0 0.0 1.3 0.9 1.1 0.5 1.3
12 2004 1.8 0.8 0.2 0.6 0.1 0.0 1.3 0.9 3.9 1.9 0.1 0.2
33 2005 0.4 0.6 1.6 1.6 0.7 0.0 1.2 6.2 7.1 6.9 3.4 3.2
21 2006 3.3 2.8 3.1 1.9 2.1 0.0 0.5 1.2 2.8 3.3 0.0 0.0
32 2007 3.6 3.0 4.3 3.7 1.6 2.3 1.4 0.6 1.8 3.8 3.1 3.1
38 2008 3.7 3.5 3.4 2.0 5.4 0.5 0.4 4.3 3.9 4.0 3.9 3.1
33 2009 3.9 3.6 3.0 2.9 1.3 0.5 0.3 2.8 3.1 4.3 3.4 3.9
18 2010 4.3 2.2 3.4 2.6 2.3 1.0 1.8 0.0 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 26 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-02 141
25-Jul-02 318
26-Jul-02 568
27-Jul-02 587
28-Jul-02 3
29-Jul-02 3
30-Jul-02 3
31-Jul-02 3
1-Aug-02 134
2-Aug-02
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 809
10-Aug-02 809
11-Aug-02 1089
12-Aug-02 1067
13-Aug-02 1055
14-Aug-02 1178
15-Aug-02 1111
16-Aug-02 929
17-Aug-02 987
18-Aug-02 523
19-Aug-02 523
20-Aug-02 249
21-Aug-02 95
22-Aug-02 3
23-Aug-02 261
24-Aug-02 345
25-Aug-02 921
26-Aug-02 1442
27-Aug-02 1377
28-Aug-02 1157
29-Aug-02 666
30-Aug-02 754
31-Aug-02 615
1-Sep-02 449
2-Sep-02 633
3-Sep-02 353
4-Sep-02 353
5-Sep-02 672
6-Sep-02 587
7-Sep-02 589
8-Sep-02 724
9-Sep-02 654
10-Sep-02 631
11-Sep-02 660
12-Sep-02 598
13-Sep-02 598
14-Sep-02 932
15-Sep-02 932
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 333
22-Sep-02 406
23-Sep-02 247
24-Sep-02 353
25-Sep-02 345
26-Sep-02 590
27-Sep-02 881
28-Sep-02 905
29-Sep-02 950
30-Sep-02 344
1-Oct-02 417
2-Oct-02 259
3-Oct-02 362
4-Oct-02 585
5-Oct-02 588
6-Oct-02 588
7-Oct-02 340
8-Oct-02 384
9-Oct-02 314
10-Oct-02 327
11-Oct-02 343
12-Oct-02 253
13-Oct-02 326
14-Oct-02 405
15-Oct-02 537
16-Oct-02 319
17-Oct-02 329
18-Oct-02 139
19-Oct-02 366
20-Oct-02 593
21-Oct-02 390
22-Oct-02 390
23-Oct-02 3
24-Oct-02 85
25-Oct-02 69
26-Oct-02 74
27-Oct-02 180
28-Oct-02 26
29-Oct-02 36
30-Oct-02 3
31-Oct-02 3
1-Nov-02 3
2-Nov-02 155
3-Nov-02 331
4-Nov-02 437
5-Nov-02 599
6-Nov-02 551
7-Nov-02 551
8-Nov-02 155
9-Nov-02 285
10-Nov-02 112
11-Nov-02 99
12-Nov-02 153
13-Nov-02 115
14-Nov-02 107
15-Nov-02 151
16-Nov-02 263
17-Nov-02 180
18-Nov-02 82
19-Nov-02 68
20-Nov-02 3
21-Nov-02 9
22-Nov-02 474
23-Nov-02 474
24-Nov-02 264
25-Nov-02 263
26-Nov-02 12
27-Nov-02 3
28-Nov-02 3
29-Nov-02 3
30-Nov-02 3
1-Dec-02 3
2-Dec-02 3
3-Dec-02 3
4-Dec-02 167
5-Dec-02 305
6-Dec-02 240
7-Dec-02 409
8-Dec-02 67
9-Dec-02 67
10-Dec-02 252
11-Dec-02 162
12-Dec-02 76
13-Dec-02 92
14-Dec-02 3
15-Dec-02 181
16-Dec-02 393
17-Dec-02 587
18-Dec-02 633
19-Dec-02 560
20-Dec-02 419
21-Dec-02 320
22-Dec-02 405
23-Dec-02 312
24-Dec-02 261
25-Dec-02 261
26-Dec-02 31
27-Dec-02 159
28-Dec-02 143
29-Dec-02 256
30-Dec-02 310
31-Dec-02 492
1-Jan-03 780
2-Jan-03 695
3-Jan-03 765
4-Jan-03 570
5-Jan-03 487
6-Jan-03 490
7-Jan-03 539
8-Jan-03 580
9-Jan-03 508
10-Jan-03 508
11-Jan-03 89
12-Jan-03 249
13-Jan-03 157
14-Jan-03 154
15-Jan-03 194
16-Jan-03 126
17-Jan-03 182
18-Jan-03 116
19-Jan-03 124
20-Jan-03 3
21-Jan-03 175
22-Jan-03 291
23-Jan-03 195
24-Jan-03 429
25-Jan-03 171
26-Jan-03 171
27-Jan-03 3
28-Jan-03 37
29-Jan-03 3
30-Jan-03 3
31-Jan-03 105
1-Feb-03 225
2-Feb-03 542
3-Feb-03 599
4-Feb-03 553
5-Feb-03 500
6-Feb-03 363
7-Feb-03 292
8-Feb-03 290
9-Feb-03 208
10-Feb-03 516
11-Feb-03 516
12-Feb-03 540
13-Feb-03 325
14-Feb-03 26
15-Feb-03 193
16-Feb-03 127
17-Feb-03 502
18-Feb-03 867
19-Feb-03 785
20-Feb-03 726
21-Feb-03 404
22-Feb-03 538
23-Feb-03 544
24-Feb-03 340
25-Feb-03 307
26-Feb-03 181
27-Feb-03 181
28-Feb-03 155
1-Mar-03 90
2-Mar-03 3
3-Mar-03 3
4-Mar-03 3
5-Mar-03 3
6-Mar-03 11
7-Mar-03 3
8-Mar-03 3
9-Mar-03 3
10-Mar-03 181
11-Mar-03 181
12-Mar-03 142
13-Mar-03 246
14-Mar-03 294
15-Mar-03 294
16-Mar-03 3
17-Mar-03 127
18-Mar-03 3
19-Mar-03 45
20-Mar-03 202
21-Mar-03 3
22-Mar-03 53
23-Mar-03 3
24-Mar-03 3
25-Mar-03 3
26-Mar-03 3
27-Mar-03 3
28-Mar-03 104
29-Mar-03 287
30-Mar-03 347
31-Mar-03 347
1-Apr-03 207
2-Apr-03 202
3-Apr-03 3
4-Apr-03 5
5-Apr-03 6
6-Apr-03 3
7-Apr-03 3
8-Apr-03 81
9-Apr-03 42
10-Apr-03 3