Site ID: 243 Lat. 15.9573 Thailand Roi
River: Chi Long. 103.9257
Site name: Selaphum Contributing area: 41568 km2 Ratio to Comparison Station: 0.08
Latest measurement: 29-Jul-10 Mean annual runoff: 288 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 103.8 mm
Latest M/C ratio: 1.10 Seven day total: 0.0 mm
Estimated current discharge: 3 m3/sec Percent of mean 7-day total: 1.4 % (today's value compared to mean for same period, 2003-2009)
Ice-cover determination: 5 yr recurrence flood: 2084 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 2058 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
297 2002 no data no data no data no data no data no data no data 4.8 47.5 107.2 83.5 54.4
291 2003 44.5 30.3 6.8 0.8 21.4 9.6 7.8 3.0 66.4 48.6 25.3 26.5
328 2004 33.6 29.9 10.8 0.3 23.3 9.0 5.3 50.3 48.2 48.1 36.2 33.3
237 2005 38.5 24.5 6.0 4.6 8.0 19.7 2.2 5.8 28.7 32.9 46.6 19.9
262 2006 34.8 31.9 14.0 0.6 4.3 71.3 34.4 12.6 0.9 57.5 0.0 0.0
286 2007 37.6 46.5 6.6 2.6 12.2 12.8 1.2 5.2 12.9 63.3 60.1 25.4
305 2008 43.6 50.5 14.6 3.4 2.1 17.5 16.3 10.6 6.9 32.2 57.2 50.5
304 2009 84.8 72.5 7.9 0.5 17.6 41.3 19.4 6.3 1.5 11.8 21.7 18.2
104 2010 62.7 31.6 1.2 0.2 3.9 2.8 1.4 0.0 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 288 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 3
25-Jul-02 3
26-Jul-02 3
27-Jul-02 3
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 3
10-Aug-02 3
11-Aug-02 3
12-Aug-02 3
13-Aug-02 3
14-Aug-02 3
15-Aug-02 3
16-Aug-02 3
17-Aug-02 3
18-Aug-02 3
19-Aug-02 3
20-Aug-02 3
21-Aug-02 3
22-Aug-02 3
23-Aug-02 3
24-Aug-02 3
25-Aug-02 126
26-Aug-02 126
27-Aug-02 349
28-Aug-02 337
29-Aug-02 406
30-Aug-02 439
31-Aug-02 463
1-Sep-02 248
2-Sep-02 114
3-Sep-02 47
4-Sep-02 47
5-Sep-02 818
6-Sep-02 435
7-Sep-02 470
8-Sep-02 691
9-Sep-02 425
10-Sep-02 626
11-Sep-02 626
12-Sep-02 1049
13-Sep-02 1049
14-Sep-02 2220
15-Sep-02 2220
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 1429
22-Sep-02 1579
23-Sep-02 1579
24-Sep-02 1343
25-Sep-02 1302
26-Sep-02 866
27-Sep-02 866
28-Sep-02 743
29-Sep-02 933
30-Sep-02 1124
1-Oct-02 1081
2-Oct-02 1229
3-Oct-02 1363
4-Oct-02 1344
5-Oct-02 2150
6-Oct-02 2150
7-Oct-02 2096
8-Oct-02 2034
9-Oct-02 1797
10-Oct-02 2444
11-Oct-02 2891
12-Oct-02 2724
13-Oct-02 2546
14-Oct-02 1414
15-Oct-02 1450
16-Oct-02 1502
17-Oct-02 1851
18-Oct-02 2072
19-Oct-02 1815
20-Oct-02 1852
21-Oct-02 958
22-Oct-02 958
23-Oct-02 891
24-Oct-02 1249
25-Oct-02 1281
26-Oct-02 1426
27-Oct-02 1834
28-Oct-02 1421
29-Oct-02 1359
30-Oct-02 981
31-Oct-02 1434
1-Nov-02 1374
2-Nov-02 1577
3-Nov-02 1835
4-Nov-02 1545
5-Nov-02 1856
6-Nov-02 1995
7-Nov-02 1995
8-Nov-02 1826
9-Nov-02 1525
10-Nov-02 1077
11-Nov-02 1054
12-Nov-02 987
13-Nov-02 1184
14-Nov-02 1184
15-Nov-02 1388
16-Nov-02 1379
17-Nov-02 1368
18-Nov-02 1498
19-Nov-02 1531
20-Nov-02 1574
21-Nov-02 1683
22-Nov-02 1516
23-Nov-02 1516
24-Nov-02 1060
25-Nov-02 985
26-Nov-02 706
27-Nov-02 736
28-Nov-02 832
29-Nov-02 721
30-Nov-02 686
1-Dec-02 845
2-Dec-02 1098
3-Dec-02 1230
4-Dec-02 1226
5-Dec-02 1266
6-Dec-02 1131
7-Dec-02 1228
8-Dec-02 995
9-Dec-02 995
10-Dec-02 525
11-Dec-02 676
12-Dec-02 641
13-Dec-02 629
14-Dec-02 790
15-Dec-02 741
16-Dec-02 741
17-Dec-02 669
18-Dec-02 654
19-Dec-02 624
20-Dec-02 727
21-Dec-02 822
22-Dec-02 915
23-Dec-02 973
24-Dec-02 835
25-Dec-02 835
26-Dec-02 614
27-Dec-02 765
28-Dec-02 684
29-Dec-02 725
30-Dec-02 908
31-Dec-02 655
1-Jan-03 707
2-Jan-03 659
3-Jan-03 573
4-Jan-03 492
5-Jan-03 590
6-Jan-03 556
7-Jan-03 609
8-Jan-03 723
9-Jan-03 540
10-Jan-03 540
11-Jan-03 622
12-Jan-03 662
13-Jan-03 711
14-Jan-03 704
15-Jan-03 702
16-Jan-03 534
17-Jan-03 575
18-Jan-03 731
19-Jan-03 684
20-Jan-03 830
21-Jan-03 722
22-Jan-03 624
23-Jan-03 783
24-Jan-03 735
25-Jan-03 733
26-Jan-03 733
27-Jan-03 609
28-Jan-03 769
29-Jan-03 896
30-Jan-03 972
31-Jan-03 1072
1-Feb-03 838
2-Feb-03 853
3-Feb-03 610
4-Feb-03 754
5-Feb-03 614
6-Feb-03 616
7-Feb-03 619
8-Feb-03 627
9-Feb-03 834
10-Feb-03 941
11-Feb-03 941
12-Feb-03 717
13-Feb-03 603
14-Feb-03 472
15-Feb-03 619
16-Feb-03 622
17-Feb-03 436
18-Feb-03 409
19-Feb-03 70
20-Feb-03 205
21-Feb-03 300
22-Feb-03 316
23-Feb-03 351
24-Feb-03 288
25-Feb-03 330
26-Feb-03 209
27-Feb-03 209
28-Feb-03 180
1-Mar-03 136
2-Mar-03 146
3-Mar-03 169
4-Mar-03 134
5-Mar-03 184
6-Mar-03 223
7-Mar-03 175
8-Mar-03 15
9-Mar-03 3
10-Mar-03 3
11-Mar-03 3
12-Mar-03 3
13-Mar-03 74
14-Mar-03 156
15-Mar-03 156
16-Mar-03 132
17-Mar-03 103
18-Mar-03 71
19-Mar-03 86
20-Mar-03 80
21-Mar-03 76
22-Mar-03 76
23-Mar-03 65
24-Mar-03 50
25-Mar-03 261
26-Mar-03 216
27-Mar-03 260
28-Mar-03 221
29-Mar-03 3
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 3
8-Apr-03 3
9-Apr-03 3
10-Apr-03 3
11-Apr-03 3
12-Apr-03 3
13-Apr-03 3
14-Apr-03 3