Site ID: 248 Lat. 18.3430 Laos Borikhamxai
River: Mekong Long. 103.7015
Site name: Ban Thana Contributing area: 336266 km2 Ratio to Comparison Station: 0.63
Latest measurement: 29-Jul-10 Mean annual runoff: 70 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 46.6 mm
Latest M/C ratio: 1.46 Seven day total: 1.9 mm
Estimated current discharge: 1503 m3/sec Percent of mean 7-day total: 135.3 % (today's value compared to mean for same period, 2003-2009)
Ice-cover determination: 5 yr recurrence flood: 3042 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 3024 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
31 2002 no data no data no data no data no data no data no data 13.5 7.8 4.7 2.6 2.1
45 2003 3.0 2.2 2.4 2.7 2.8 7.3 6.7 6.2 4.5 2.6 2.0 2.2
44 2004 2.4 2.3 2.6 2.2 3.5 6.7 6.4 5.6 6.7 1.9 1.7 2.3
73 2005 2.4 1.4 3.2 4.6 5.6 4.6 9.5 8.7 11.7 8.9 6.3 6.3
64 2006 6.3 4.5 5.5 4.5 5.7 9.1 6.4 6.2 8.4 7.5 0.0 0.0
81 2007 5.8 5.1 5.5 4.9 4.6 7.8 9.3 8.1 10.7 7.6 5.9 5.9
105 2008 5.8 5.9 5.6 6.4 6.7 10.7 9.2 17.8 12.7 9.5 7.2 7.1
78 2009 6.5 5.2 4.5 4.6 3.6 8.3 8.0 8.2 8.3 7.3 6.5 7.0
47 2010 5.4 4.7 6.2 8.0 4.3 8.2 9.5 0.3 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 70 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 1280
23-Jul-02 1280
24-Jul-02 1017
25-Jul-02 1017
26-Jul-02 1431
27-Jul-02 1666
28-Jul-02 1059
29-Jul-02 1331
30-Jul-02 1278
31-Jul-02 881
1-Aug-02 2196
2-Aug-02
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 1320
10-Aug-02 1320
11-Aug-02 2049
12-Aug-02 2540
13-Aug-02 3137
14-Aug-02 2764
15-Aug-02 2740
16-Aug-02 2012
17-Aug-02 1577
18-Aug-02 1836
19-Aug-02 1790
20-Aug-02 1008
21-Aug-02 1653
22-Aug-02 1348
23-Aug-02 1769
24-Aug-02 2870
25-Aug-02 2909
26-Aug-02 2909
27-Aug-02 3053
28-Aug-02 2983
29-Aug-02 2206
30-Aug-02 2271
31-Aug-02 2091
1-Sep-02 1595
2-Sep-02 1823
3-Sep-02 1395
4-Sep-02 1378
5-Sep-02 1529
6-Sep-02 1530
7-Sep-02 1504
8-Sep-02 1472
9-Sep-02 1479
10-Sep-02 1681
11-Sep-02 1681
12-Sep-02 1305
13-Sep-02 1305
14-Sep-02 702
15-Sep-02 702
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 356
22-Sep-02 1141
23-Sep-02 1141
24-Sep-02 1180
25-Sep-02 1693
26-Sep-02 987
27-Sep-02 987
28-Sep-02 475
29-Sep-02 666
30-Sep-02 629
1-Oct-02 404
2-Oct-02 452
3-Oct-02 421
4-Oct-02 342
5-Oct-02 1085
6-Oct-02 1085
7-Oct-02 1018
8-Oct-02 1089
9-Oct-02 1032
10-Oct-02 973
11-Oct-02 1037
12-Oct-02 873
13-Oct-02 873
14-Oct-02 651
15-Oct-02 541
16-Oct-02 425
17-Oct-02 416
18-Oct-02 417
19-Oct-02 587
20-Oct-02 605
21-Oct-02 440
22-Oct-02 440
23-Oct-02 423
24-Oct-02 291
25-Oct-02 398
26-Oct-02 403
27-Oct-02 226
28-Oct-02 396
29-Oct-02 396
30-Oct-02 290
31-Oct-02 418
1-Nov-02 416
2-Nov-02 438
3-Nov-02 518
4-Nov-02 293
5-Nov-02 257
6-Nov-02 189
7-Nov-02 189
8-Nov-02 287
9-Nov-02 327
10-Nov-02 322
11-Nov-02 425
12-Nov-02 520
13-Nov-02 464
14-Nov-02 464
15-Nov-02 337
16-Nov-02 365
17-Nov-02 345
18-Nov-02 358
19-Nov-02 344
20-Nov-02 310
21-Nov-02 356
22-Nov-02 247
23-Nov-02 247
24-Nov-02 334
25-Nov-02 392
26-Nov-02 502
27-Nov-02 330
28-Nov-02 249
29-Nov-02 96
30-Nov-02 96
1-Dec-02 238
2-Dec-02 344
3-Dec-02 309
4-Dec-02 308
5-Dec-02 315
6-Dec-02 178
7-Dec-02 221
8-Dec-02 134
9-Dec-02 134
10-Dec-02 133
11-Dec-02 189
12-Dec-02 217
13-Dec-02 278
14-Dec-02 354
15-Dec-02 218
16-Dec-02 218
17-Dec-02 85
18-Dec-02 117
19-Dec-02 270
20-Dec-02 286
21-Dec-02 343
22-Dec-02 313
23-Dec-02 215
24-Dec-02 220
25-Dec-02 220
26-Dec-02 407
27-Dec-02 302
28-Dec-02 282
29-Dec-02 372
30-Dec-02 321
31-Dec-02 454
1-Jan-03 454
2-Jan-03 399
3-Jan-03 377
4-Jan-03 405
5-Jan-03 371
6-Jan-03 347
7-Jan-03 333
8-Jan-03 284
9-Jan-03 221
10-Jan-03 221
11-Jan-03 378
12-Jan-03 374
13-Jan-03 486
14-Jan-03 458
15-Jan-03 384
16-Jan-03 404
17-Jan-03 404
18-Jan-03 349
19-Jan-03 413
20-Jan-03 385
21-Jan-03 429
22-Jan-03 476
23-Jan-03 378
24-Jan-03 405
25-Jan-03 286
26-Jan-03 286
27-Jan-03 410
28-Jan-03 428
29-Jan-03 480
30-Jan-03 387
31-Jan-03 331
1-Feb-03 245
2-Feb-03 245
3-Feb-03 320
4-Feb-03 390
5-Feb-03 440
6-Feb-03 364
7-Feb-03 370
8-Feb-03 308
9-Feb-03 244
10-Feb-03 253
11-Feb-03 253
12-Feb-03 320
13-Feb-03 352
14-Feb-03 457
15-Feb-03 398
16-Feb-03 351
17-Feb-03 209
18-Feb-03 209
19-Feb-03 196
20-Feb-03 295
21-Feb-03 360
22-Feb-03 268
23-Feb-03 271
24-Feb-03 228
25-Feb-03 183
26-Feb-03 316
27-Feb-03 316
28-Feb-03 320
1-Mar-03 317
2-Mar-03 342
3-Mar-03 409
4-Mar-03 427
5-Mar-03 428
6-Mar-03 428
7-Mar-03 319
8-Mar-03 345
9-Mar-03 352
10-Mar-03 429
11-Mar-03 429
12-Mar-03 403
13-Mar-03 438
14-Mar-03 186
15-Mar-03 199
16-Mar-03 313
17-Mar-03 336
18-Mar-03 454