Site ID: 251 Lat. 19.5472 Thailand Chiang Rai
River: Nam Ing Long. 100.1637
Site name: Thoeng Contributing area: 3250 km2 Ratio to Comparison Station: 0.01
Latest measurement: 30-Jul-10 Mean annual runoff: 1232 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 1237.4 mm
Latest M/C ratio: 1.11 Seven day total: 19.1 mm
Estimated current discharge: 37 m3/sec Percent of mean 7-day total: 30.2 % (today's value compared to mean for same period, 2003-2009)
Ice-cover determination: 5 yr recurrence flood: 1693 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 1701 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
215 2002 no data no data no data no data no data no data no data 20.3 166.3 2.7 6.3 19.0
856 2003 2.7 2.5 3.0 2.6 3.1 37.9 419.2 233.7 139.4 6.6 2.2 2.7
1438 2004 2.7 2.6 7.2 90.1 194.4 659.7 289.7 155.5 28.3 2.7 2.6 2.7
781 2005 2.7 2.5 2.7 24.8 43.6 80.4 163.8 342.5 18.7 93.6 2.6 2.7
703 2006 8.8 2.9 3.8 27.6 148.9 349.7 94.1 53.4 11.4 2.7 0.0 0.0
1740 2007 6.0 2.5 71.0 78.4 840.3 359.1 296.5 3.1 74.6 2.7 2.6 3.1
1646 2008 8.2 3.9 2.7 4.4 138.8 716.3 581.8 125.4 56.7 2.7 2.6 2.7
1459 2009 24.5 18.7 31.8 8.6 432.4 447.6 361.9 10.6 2.6 2.7 2.6 114.3
1237 2010 240.1 136.9 9.4 22.2 108.6 441.8 272.9 5.6 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 1232 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-02 139
23-Jul-02 139
24-Jul-02 701
25-Jul-02 729
26-Jul-02 891
27-Jul-02 721
28-Jul-02 591
29-Jul-02 3
30-Jul-02 15
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-02 170
10-Aug-02 113
11-Aug-02 79
12-Aug-02 33
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-02 117
23-Aug-02 48
24-Aug-02 48
25-Aug-02 3
26-Aug-02 22
27-Aug-02 81
28-Aug-02 3
29-Aug-02 3
30-Aug-02 3
31-Aug-02 3
1-Sep-02 173
2-Sep-02 108
3-Sep-02 3
4-Sep-02 3
5-Sep-02 3
6-Sep-02 3
7-Sep-02 28
8-Sep-02 3
9-Sep-02 3
10-Sep-02 3
11-Sep-02 16
12-Sep-02 95
13-Sep-02 95
14-Sep-02 323
15-Sep-02
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02
22-Sep-02 1483
23-Sep-02 1483
24-Sep-02 868
25-Sep-02 868
26-Sep-02 3
27-Sep-02 107
28-Sep-02 7
29-Sep-02 121
30-Sep-02 454
1-Oct-02 3
2-Oct-02 3
3-Oct-02 3
4-Oct-02 3
5-Oct-02 3
6-Oct-02 3
7-Oct-02 3
8-Oct-02 3
9-Oct-02 3
10-Oct-02 3
11-Oct-02 3
12-Oct-02 3
13-Oct-02 3
14-Oct-02 3
15-Oct-02 3
16-Oct-02 3
17-Oct-02 3
18-Oct-02 3
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20-Oct-02 3
21-Oct-02 3
22-Oct-02 3
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24-Oct-02 3
25-Oct-02 3
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27-Oct-02 3
28-Oct-02 3
29-Oct-02 3
30-Oct-02 3
31-Oct-02 3
1-Nov-02 3
2-Nov-02 3
3-Nov-02 3
4-Nov-02 3
5-Nov-02 3
6-Nov-02 3
7-Nov-02 3
8-Nov-02 3
9-Nov-02 22
10-Nov-02 123
11-Nov-02 3
12-Nov-02 3
13-Nov-02 3
14-Nov-02 3
15-Nov-02 3
16-Nov-02 3
17-Nov-02 3
18-Nov-02 3
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20-Nov-02 3
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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
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5-Dec-02 3
6-Dec-02 3
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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 6
28-Dec-02 137
29-Dec-02 240
30-Dec-02 240
31-Dec-02 3
1-Jan-03 3
2-Jan-03 3
3-Jan-03 3
4-Jan-03 3
5-Jan-03 3
6-Jan-03 3
7-Jan-03 3
8-Jan-03 3
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1-Feb-03 3
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1-Mar-03 3
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16-Mar-03 12
17-Mar-03 3
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1-May-03 3
2-May-03 3
3-May-03 3
4-May-03 3
5-May-03 17
6-May-03 3
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13-May-03 3