Site ID: 233 Lat. 13.0890 Cambodia Siemreab-Otdar Meanchey
River: Chikreng Long. 104.3116
Site name: Phumi Spean Tnot Contributing area: 1887 km2 Ratio to Comparison Station: 0.00
Latest measurement: 29-Jul-10 Mean annual runoff: 13498 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 1345.1 mm
Latest M/C ratio: 1.11 Seven day total: 1.6 mm
Estimated current discharge: 16 m3/sec Percent of mean 7-day total: 0.4 % (today's value compared to mean for same period, 2003-2009)
Ice-cover determination: 5 yr recurrence flood: 5786 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 5601 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
7791 2002 no data no data no data no data no data no data no data 1168.8 2416.7 3237.9 853.9 114.1
5559 2003 6.2 4.3 4.7 26.1 38.2 43.5 680.4 880.1 2093.0 1728.7 48.8 4.7
8678 2004 4.7 4.4 253.8 10.6 210.1 2120.4 935.9 2535.8 1682.3 894.0 19.9 5.6
17190 2005 4.7 5.4 5.2 77.8 685.9 972.1 1713.1 1367.1 4113.1 5565.7 2232.3 447.3
16609 2006 13.3 14.5 9.3 87.5 5.8 321.9 3382.3 3781.9 4828.4 4164.2 0.0 0.0
14682 2007 159.6 4.5 155.9 493.6 1398.3 464.0 3140.9 1245.2 2317.1 2987.6 1826.7 488.2
14834 2008 205.5 6.8 4.7 40.5 1216.2 394.8 270.0 1523.7 3935.4 3960.0 2175.7 1101.0
16932 2009 218.2 35.8 9.9 4.6 443.4 653.1 2216.9 1863.3 3618.1 4689.4 2298.1 881.4
1345 2010 146.9 5.1 4.9 4.6 791.5 5.5 378.9 7.8 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 13498 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-02 214
27-Jul-02 214
28-Jul-02 419
29-Jul-02 350
30-Jul-02 239
31-Jul-02 239
1-Aug-02 228
2-Aug-02
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 925
10-Aug-02 925
11-Aug-02 449
12-Aug-02 449
13-Aug-02 83
14-Aug-02 279
15-Aug-02 410
16-Aug-02 480
17-Aug-02 651
18-Aug-02 585
19-Aug-02 585
20-Aug-02 792
21-Aug-02 992
22-Aug-02 1071
23-Aug-02 1164
24-Aug-02 1190
25-Aug-02 1644
26-Aug-02 2147
27-Aug-02 2570
28-Aug-02 2570
29-Aug-02 1822
30-Aug-02 1856
31-Aug-02 1656
1-Sep-02 1729
2-Sep-02 1902
3-Sep-02 3010
4-Sep-02 3010
5-Sep-02 4450
6-Sep-02 4613
7-Sep-02 4371
8-Sep-02 3433
9-Sep-02 3028
10-Sep-02 1554
11-Sep-02 735
12-Sep-02 525
13-Sep-02 525
14-Sep-02 577
15-Sep-02 577
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 3
22-Sep-02 693
23-Sep-02 1005
24-Sep-02 1589
25-Sep-02 2318
26-Sep-02 2514
27-Sep-02 2907
28-Sep-02 2446
29-Sep-02 2446
30-Sep-02 2807
1-Oct-02 3357
2-Oct-02 3688
3-Oct-02 3419
4-Oct-02 3688
5-Oct-02 2452
6-Oct-02 2452
7-Oct-02 2270
8-Oct-02 2726
9-Oct-02 3352
10-Oct-02 3847
11-Oct-02 4326
12-Oct-02 4255
13-Oct-02 4431
14-Oct-02 2846
15-Oct-02 2846
16-Oct-02 2396
17-Oct-02 1933
18-Oct-02 1768
19-Oct-02 1376
20-Oct-02 853
21-Oct-02 1110
22-Oct-02 1110
23-Oct-02 1331
24-Oct-02 1415
25-Oct-02 1077
26-Oct-02 773
27-Oct-02 680
28-Oct-02 872
29-Oct-02 999
30-Oct-02 1524
31-Oct-02 1524
1-Nov-02 20
2-Nov-02 488
3-Nov-02 350
4-Nov-02 995
5-Nov-02 2331
6-Nov-02 1682
7-Nov-02 1682
8-Nov-02 636
9-Nov-02 532
10-Nov-02 906
11-Nov-02 807
12-Nov-02 878
13-Nov-02 1455
14-Nov-02 1248
15-Nov-02 907
16-Nov-02 907
17-Nov-02 3
18-Nov-02 295
19-Nov-02 496
20-Nov-02 433
21-Nov-02 725
22-Nov-02 185
23-Nov-02 185
24-Nov-02 142
25-Nov-02 11
26-Nov-02 72
27-Nov-02 109
28-Nov-02 76
29-Nov-02 87
30-Nov-02 3
1-Dec-02 67
2-Dec-02 67
3-Dec-02 364
4-Dec-02 299
5-Dec-02 257
6-Dec-02 154
7-Dec-02 57
8-Dec-02 103
9-Dec-02 103
10-Dec-02 348
11-Dec-02 252
12-Dec-02 212
13-Dec-02 106
14-Dec-02 3
15-Dec-02 3
16-Dec-02 3
17-Dec-02 3
18-Dec-02 3
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 45
28-Dec-02 3
29-Dec-02 3
30-Dec-02 3
31-Dec-02 3
1-Jan-03 3
2-Jan-03 11
3-Jan-03 11
4-Jan-03 3
5-Jan-03 3
6-Jan-03 3
7-Jan-03 3
8-Jan-03 21
9-Jan-03 3
10-Jan-03 3
11-Jan-03 3
12-Jan-03 3
13-Jan-03 3
14-Jan-03 3
15-Jan-03 3
16-Jan-03 3
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1-Feb-03 3
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28-Feb-03 3
1-Mar-03 3
2-Mar-03 3
3-Mar-03 3
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27-Mar-03 3
28-Mar-03 3
29-Mar-03 3
30-Mar-03 3
31-Mar-03 3
1-Apr-03 3
2-Apr-03 3
3-Apr-03 102
4-Apr-03 119
5-Apr-03 259
6-Apr-03 3
7-Apr-03 3
8-Apr-03 3
9-Apr-03 3
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24-Apr-03 3