Site ID: 259 Lat. 14.4554 Thailand Ang Thong
River: Chao Phraya Long. 100.4510
Site name: Pa Mok Contributing area: 131692 km2 Ratio to Comparison Station: 0.25
Latest measurement: 30-Jul-10 Mean annual runoff: 206 mm (2003-2009)
Hydrologic status: 1 Low flow Total runoff this year (2010): 123.4 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: 3.3 % (today's value compared to mean for same period, 2003-2009)
Ice-cover determination: 5 yr recurrence flood: 4979 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 4716 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
180 2002 no data no data no data no data no data no data no data 0.7 8.1 63.7 60.3 47.4
95 2003 23.4 13.3 9.6 4.5 2.4 7.6 0.4 0.1 2.7 9.1 9.7 12.2
86 2004 9.0 10.5 11.0 7.1 4.6 7.3 1.5 0.5 3.8 11.4 7.4 11.5
272 2005 13.5 11.9 13.1 8.8 3.8 0.8 4.7 7.1 4.5 23.0 100.8 79.6
158 2006 17.4 7.7 12.5 9.4 7.1 10.2 9.6 5.7 15.2 62.6 0.0 0.0
285 2007 49.1 23.7 14.7 4.4 7.2 3.2 2.9 2.2 23.4 51.2 58.6 44.2
251 2008 39.0 15.6 11.7 18.7 15.5 0.7 0.1 0.2 18.2 52.6 37.1 41.3
298 2009 39.2 23.8 13.6 14.9 13.3 0.1 1.8 7.0 27.3 43.7 50.5 63.2
123 2010 45.5 24.5 12.4 17.2 17.9 5.8 0.1 0.0 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 206 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-02 226
10-Aug-02 241
11-Aug-02 147
12-Aug-02 90
13-Aug-02 48
14-Aug-02 3
15-Aug-02 16
16-Aug-02 40
17-Aug-02 40
18-Aug-02 20
19-Aug-02 3
20-Aug-02 3
21-Aug-02 56
22-Aug-02 51
23-Aug-02 3
24-Aug-02 3
25-Aug-02 3
26-Aug-02 3
27-Aug-02 3
28-Aug-02 3
29-Aug-02 3
30-Aug-02 3
31-Aug-02 3
1-Sep-02 150
2-Sep-02 150
3-Sep-02 392
4-Sep-02 393
5-Sep-02 360
6-Sep-02 357
7-Sep-02 372
8-Sep-02 402
9-Sep-02 402
10-Sep-02 659
11-Sep-02 521
12-Sep-02 403
13-Sep-02 403
14-Sep-02 198
15-Sep-02 155
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02
22-Sep-02 768
23-Sep-02 768
24-Sep-02 868
25-Sep-02 868
26-Sep-02 865
27-Sep-02 763
28-Sep-02 596
29-Sep-02 750
30-Sep-02 745
1-Oct-02 995
2-Oct-02 1297
3-Oct-02 1716
4-Oct-02 1716
5-Oct-02 2466
6-Oct-02 2460
7-Oct-02 2659
8-Oct-02 2713
9-Oct-02 2632
10-Oct-02 3124
11-Oct-02 3124
12-Oct-02 3563
13-Oct-02 3889
14-Oct-02 3945
15-Oct-02 4037
16-Oct-02 4146
17-Oct-02 4376
18-Oct-02 4910
19-Oct-02 4423
20-Oct-02 4423
21-Oct-02 3639
22-Oct-02 3904
23-Oct-02 4162
24-Oct-02 3116
25-Oct-02 2777
26-Oct-02 2884
27-Oct-02 2884
28-Oct-02 3373
29-Oct-02 3216
30-Oct-02 2114
31-Oct-02 2372
1-Nov-02 2380
2-Nov-02 2222
3-Nov-02 2790
4-Nov-02 2485
5-Nov-02 2485
6-Nov-02 2730
7-Nov-02 2778
8-Nov-02 2879
9-Nov-02 3283
10-Nov-02 3497
11-Nov-02 3853
12-Nov-02 3853
13-Nov-02 2577
14-Nov-02 2759
15-Nov-02 2558
16-Nov-02 2736
17-Nov-02 3108
18-Nov-02 3194
19-Nov-02 3354
20-Nov-02 3579
21-Nov-02 3579
22-Nov-02 3386
23-Nov-02 3415
24-Nov-02 3234
25-Nov-02 3072
26-Nov-02 3112
27-Nov-02 3274
28-Nov-02 3274
29-Nov-02 3253
30-Nov-02 3177
1-Dec-02 2967
2-Dec-02 2999
3-Dec-02 3081
4-Dec-02 3086
5-Dec-02 3070
6-Dec-02 2784
7-Dec-02 2784
8-Dec-02 2154
9-Dec-02 1892
10-Dec-02 1573
11-Dec-02 1577
12-Dec-02 1480
13-Dec-02 1714
14-Dec-02 1714
15-Dec-02 2399
16-Dec-02 2173
17-Dec-02 1912
18-Dec-02 1984
19-Dec-02 1680
20-Dec-02 2006
21-Dec-02 2527
22-Dec-02 2904
23-Dec-02 2904
24-Dec-02 2052
25-Dec-02 2264
26-Dec-02 1932
27-Dec-02 2265
28-Dec-02 2898
29-Dec-02 2528
30-Dec-02 2528
31-Dec-02 2340
1-Jan-03 2340
2-Jan-03 1362
3-Jan-03 1484
4-Jan-03 980
5-Jan-03 1208
6-Jan-03 1719
7-Jan-03 1419
8-Jan-03 1419
9-Jan-03 1228
10-Jan-03 1388
11-Jan-03 1499
12-Jan-03 1482
13-Jan-03 1581
14-Jan-03 1165
15-Jan-03 1165
16-Jan-03 805
17-Jan-03 893
18-Jan-03 727
19-Jan-03 809
20-Jan-03 843
21-Jan-03 946
22-Jan-03 1235
23-Jan-03 1250
24-Jan-03 1250
25-Jan-03 730
26-Jan-03 751
27-Jan-03 593
28-Jan-03 672
29-Jan-03 816
30-Jan-03 961
31-Jan-03 961
1-Feb-03 782
2-Feb-03 827
3-Feb-03 738
4-Feb-03 742
5-Feb-03 825
6-Feb-03 906
7-Feb-03 955
8-Feb-03 1019
9-Feb-03 1019
10-Feb-03 635
11-Feb-03 643
12-Feb-03 520
13-Feb-03 626
14-Feb-03 760
15-Feb-03 815
16-Feb-03 815
17-Feb-03 628
18-Feb-03 661
19-Feb-03 452
20-Feb-03 625
21-Feb-03 671
22-Feb-03 685
23-Feb-03 989
24-Feb-03 542
25-Feb-03 542
26-Feb-03 535
27-Feb-03 613
28-Feb-03 769
1-Mar-03 623
2-Mar-03 557
3-Mar-03 316
4-Mar-03 316
5-Mar-03 308
6-Mar-03 474
7-Mar-03 574
8-Mar-03 588
9-Mar-03 720
10-Mar-03 268
11-Mar-03 268
12-Mar-03 278
13-Mar-03 278
14-Mar-03 436
15-Mar-03 429
16-Mar-03 339
17-Mar-03 429
18-Mar-03 513
19-Mar-03 798
20-Mar-03 798
21-Mar-03 960
22-Mar-03 767
23-Mar-03 444
24-Mar-03 430
25-Mar-03 294
26-Mar-03 331
27-Mar-03 381
28-Mar-03 660
29-Mar-03 660
30-Mar-03 149
31-Mar-03 176
1-Apr-03 3
2-Apr-03 3
3-Apr-03 149
4-Apr-03 395
5-Apr-03 395
6-Apr-03 248
7-Apr-03 291