Site ID: 282 Lat. -18.0285 Namibia Chobe
River: Chobe Long. 24.6050
Site name: Kavimba Contributing area: 146424 km2 Ratio to Comparison Station: 0.27
Latest measurement: 2-Sep-11 Mean annual runoff: 108 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 314.9 mm
Latest M/C ratio: 1.17 Seven day total: 1.6 mm
Estimated current discharge: 271 m3/sec Percent of mean 7-day total: 266.8 % (today's value compared to mean for same period, 2003-2009)
Ice-cover determination: 5 yr recurrence flood: 5856 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 5530 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
1 2002 no data no data no data no data no data no data no data 0.0 0.0 0.1 0.7 0.2
31 2003 0.1 0.1 1.7 0.1 16.6 9.6 2.9 0.2 0.1 0.1 0.0 0.1
28 2004 0.1 0.1 0.1 6.1 10.0 8.8 2.4 0.1 0.1 0.1 0.1 0.1
1 2005 0.1 0.1 0.1 0.1 0.1 0.1 0.0 0.1 0.1 0.1 0.1 0.4
17 2006 0.6 0.1 0.1 0.2 7.8 7.3 0.9 0.1 0.1 0.1 0.0 0.0
263 2007 0.1 0.1 74.7 82.5 73.7 27.3 4.2 0.3 0.1 0.1 0.1 0.1
183 2008 0.1 0.3 38.8 56.0 63.4 19.2 4.4 0.1 0.1 0.1 0.8 0.1
235 2009 0.1 0.1 25.0 81.5 76.4 35.3 12.2 2.4 0.2 0.7 0.1 0.6
315 2010 0.1 0.2 32.0 64.3 81.5 64.5 43.3 16.1 6.1 2.3 2.0 2.4
Mean Annual Runoff (mm): 108 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
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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 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 3
2-Sep-02 3
3-Sep-02 3
4-Sep-02 3
5-Sep-02 3
6-Sep-02 3
7-Sep-02 3
8-Sep-02 3
9-Sep-02 3
10-Sep-02 3
11-Sep-02 3
12-Sep-02 3
13-Sep-02 3
14-Sep-02 3
15-Sep-02 3
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 3
22-Sep-02 3
23-Sep-02 3
24-Sep-02 3
25-Sep-02 3
26-Sep-02 3
27-Sep-02 3
28-Sep-02 3
29-Sep-02 3
30-Sep-02 3
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
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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 57
7-Nov-02 360
8-Nov-02 421
9-Nov-02 254
10-Nov-02 3
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1-Dec-02 3
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3-Dec-02 3
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8-Dec-02 3
9-Dec-02 54
10-Dec-02 3
11-Dec-02 169
12-Dec-02 8
13-Dec-02 3
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1-Jan-03 3
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1-Feb-03 3
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9-Feb-03 83
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21-Mar-03 35
22-Mar-03 271
23-Mar-03 306
24-Mar-03 306
25-Mar-03 739
26-Mar-03 395
27-Mar-03 462
28-Mar-03 233
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1-May-03 3
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3-May-03 1304
4-May-03 1251
5-May-03 899
6-May-03 1436
7-May-03 1508