Site ID: 230 Lat. 12.1050 Cambodia Kampong Chhnang
River: Tonle Sap Long. 104.7954
Site name: Kampong Chnang Contributing area: 83034 km2 Ratio to Comparison Station: 0.15
Latest measurement: 29-Jul-10 Mean annual runoff: 1101 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 239.6 mm
Latest M/C ratio: 1.23 Seven day total: 3.4 mm
Estimated current discharge: 489 m3/sec Percent of mean 7-day total: 20.6 % (today's value compared to mean for same period, 2003-2009)
Ice-cover determination: 5 yr recurrence flood: 9479 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 9423 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
603 2002 no data no data no data no data no data no data no data 96.9 28.6 113.3 151.0 213.4
1113 2003 165.4 69.4 21.5 16.2 19.6 33.2 31.9 92.5 173.9 211.1 143.2 134.9
908 2004 54.4 19.4 2.6 1.1 0.3 18.7 35.4 158.6 146.8 149.1 184.7 137.3
1118 2005 60.9 19.9 27.4 18.1 21.6 21.4 42.9 174.3 177.4 181.2 161.5 211.2
826 2006 129.6 50.9 39.7 22.1 15.5 13.3 54.2 176.6 203.3 121.2 0.0 0.0
1178 2007 132.9 59.1 31.6 19.2 35.2 22.2 45.3 131.0 185.5 163.3 165.2 187.2
1222 2008 130.5 57.3 33.3 18.7 30.9 32.4 73.0 162.2 173.4 195.9 164.2 150.6
1343 2009 151.0 54.6 35.2 21.4 18.5 35.1 65.5 201.1 167.5 187.1 188.5 217.8
240 2010 112.3 47.3 28.2 19.2 14.3 5.8 12.1 0.3 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 1101 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 6872
23-Jul-02 6872
24-Jul-02 7142
25-Jul-02 7166
26-Jul-02 8231
27-Jul-02 8231
28-Jul-02 7687
29-Jul-02 7508
30-Jul-02 6741
31-Jul-02 6741
1-Aug-02 7167
2-Aug-02
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 6130
10-Aug-02 6130
11-Aug-02 6464
12-Aug-02 6464
13-Aug-02 3762
14-Aug-02 4899
15-Aug-02 4058
16-Aug-02 4182
17-Aug-02 5893
18-Aug-02 4313
19-Aug-02 4313
20-Aug-02 4124
21-Aug-02 4393
22-Aug-02 4844
23-Aug-02 4845
24-Aug-02 5292
25-Aug-02 5826
26-Aug-02
27-Aug-02
28-Aug-02
29-Aug-02
30-Aug-02
31-Aug-02
1-Sep-02 647
2-Sep-02 580
3-Sep-02 675
4-Sep-02 675
5-Sep-02
6-Sep-02
7-Sep-02 6438
8-Sep-02 6267
9-Sep-02 6283
10-Sep-02 5935
11-Sep-02
12-Sep-02
13-Sep-02
14-Sep-02
15-Sep-02
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02
22-Sep-02
23-Sep-02
24-Sep-02
25-Sep-02
26-Sep-02
27-Sep-02
28-Sep-02
29-Sep-02
30-Sep-02
1-Oct-02
2-Oct-02
3-Oct-02 2417
4-Oct-02 2402
5-Oct-02 3615
6-Oct-02 3615
7-Oct-02 4538
8-Oct-02 4620
9-Oct-02 6717
10-Oct-02 6483
11-Oct-02 6517
12-Oct-02 6795
13-Oct-02
14-Oct-02
15-Oct-02
16-Oct-02
17-Oct-02
18-Oct-02
19-Oct-02 7748
20-Oct-02 7886
21-Oct-02 7603
22-Oct-02 7603
23-Oct-02
24-Oct-02
25-Oct-02 1248
26-Oct-02 3845
27-Oct-02 3692
28-Oct-02 3600
29-Oct-02 6703
30-Oct-02 5598
31-Oct-02 5598
1-Nov-02 5709
2-Nov-02 5709
3-Nov-02
4-Nov-02
5-Nov-02
6-Nov-02
7-Nov-02
8-Nov-02 3871
9-Nov-02 5462
10-Nov-02 6471
11-Nov-02 5015
12-Nov-02 5180
13-Nov-02 5319
14-Nov-02 4406
15-Nov-02 6221
16-Nov-02 6221
17-Nov-02 6005
18-Nov-02 6822
19-Nov-02 8074
20-Nov-02 8123
21-Nov-02 8398
22-Nov-02 7704
23-Nov-02 7704
24-Nov-02
25-Nov-02
26-Nov-02 6576
27-Nov-02 6580
28-Nov-02 6541
29-Nov-02 6627
30-Nov-02 6400
1-Dec-02 4856
2-Dec-02 4856
3-Dec-02 3827
4-Dec-02 4065
5-Dec-02 4394
6-Dec-02 6124
7-Dec-02 7948
8-Dec-02 7702
9-Dec-02 7702
10-Dec-02 6906
11-Dec-02 6873
12-Dec-02 6251
13-Dec-02 6527
14-Dec-02 6057
15-Dec-02 7276
16-Dec-02 8836
17-Dec-02 8702
18-Dec-02 8702
19-Dec-02 7831
20-Dec-02 7736
21-Dec-02 7156
22-Dec-02 7253
23-Dec-02 7494
24-Dec-02 6802
25-Dec-02 6802
26-Dec-02 6895
27-Dec-02 6694
28-Dec-02 6004
29-Dec-02 5918
30-Dec-02 5364
31-Dec-02 5570
1-Jan-03 6284
2-Jan-03 6579
3-Jan-03 6579
4-Jan-03 6673
5-Jan-03 6949
6-Jan-03 7327
7-Jan-03 7111
8-Jan-03 7099
9-Jan-03 5654
10-Jan-03 5654
11-Jan-03 5576
12-Jan-03 5549
13-Jan-03 4998
14-Jan-03 5168
15-Jan-03 4769
16-Jan-03 4985
17-Jan-03 5941
18-Jan-03 5133
19-Jan-03 5133
20-Jan-03 4309
21-Jan-03 3954
22-Jan-03 3889
23-Jan-03 4272
24-Jan-03 4147
25-Jan-03 4226
26-Jan-03 4226
27-Jan-03 3806
28-Jan-03 3586
29-Jan-03 3338
30-Jan-03 3180
31-Jan-03 2845
1-Feb-03 2886
2-Feb-03 3001
3-Feb-03 3584
4-Feb-03 3584
5-Feb-03 3722
6-Feb-03 3551
7-Feb-03 3409
8-Feb-03 3091
9-Feb-03 2854
10-Feb-03 2677
11-Feb-03 2677
12-Feb-03 2428
13-Feb-03 2584
14-Feb-03 1986
15-Feb-03 2053
16-Feb-03 2086
17-Feb-03 1934
18-Feb-03 2345
19-Feb-03 2340
20-Feb-03 2340
21-Feb-03 1996
22-Feb-03 1854
23-Feb-03 1664
24-Feb-03 1541
25-Feb-03 1439
26-Feb-03 976
27-Feb-03 976
28-Feb-03 1095
1-Mar-03 1275
2-Mar-03 1213
3-Mar-03 1156
4-Mar-03 1025
5-Mar-03 676
6-Mar-03 776
7-Mar-03 570
8-Mar-03 570
9-Mar-03 218
10-Mar-03 3
11-Mar-03 3
12-Mar-03 3
13-Mar-03 3
14-Mar-03 545
15-Mar-03 545
16-Mar-03 1038
17-Mar-03 968
18-Mar-03 549
19-Mar-03 534
20-Mar-03 434
21-Mar-03 298
22-Mar-03 634
23-Mar-03 948
24-Mar-03 948
25-Mar-03 636
26-Mar-03 555
27-Mar-03 437
28-Mar-03 756