| Site ID: |
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1223 |
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Lat. |
-32.6691 |
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South
Africa |
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Western
Cape |
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| River: |
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Sout |
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Long. |
22.9318 |
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| Site name: |
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Rietbron |
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Contributing
area: |
1516 |
km2 |
Ratio to Comparison
Station: |
0.07 |
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| Latest measurement: |
15-Nov-09 |
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Mean annual
runoff: |
365 |
mm |
(2003-2007) |
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| Hydrologic status: |
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2 |
Normal flow |
Total runoff
this year: |
390 |
mm |
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| Latest M/C ratio: |
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1.10 |
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Seven day
total: |
1 |
mm |
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| Estimated current discharge: |
3 |
m3/sec |
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Percent of
mean 7-day total: |
5.1 |
% |
(today's value compared to
mean for same period, 2003-2007) |
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| Ice-cover determination: |
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5 yr
recurrence flood: |
732 |
m3/sec |
(from Log Pearson III
analysis) |
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| Status Codes: 1 = Low
flow, 2 = Normal flow, 3 = Flood, 4 = Major Flood |
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691 |
m3/sec |
(from Gumbel Extreme Value
analysis) |
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| Comparison Station Information: |
Tokwe
Confluence D/s C/s (1495240) |
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Contributing
Area: |
7280 |
sq mi |
23237 |
sq km |
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| (Data from this gaging station are used for the calibration to
discharge, with an adjustment for different contributing areas) |
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| Notes: |
Comparison station is
placeholder, only; this site is not yet calibrated to actual discharge |
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| Discharge and runoff, based on satellite remote sensing (NASA
AMSR-E data) |
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| (For U.S, sites, nearby ground station discharge may also be
shown) |
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2008-Present |
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2002-Present |
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| Annual |
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|
Monthly Total Runoff (mm),
computed from above satellite-based discharge data |
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| Runoff |
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| (mm) |
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Jan |
Feb |
Mar |
April |
May |
June |
July |
Aug |
Sept |
Oct |
Nov |
Dec |
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| 337 |
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2002 |
no data |
no data |
no data |
no data |
no data |
no data |
no data |
157.3 |
4.7 |
5.9 |
21.9 |
147.2 |
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| 161 |
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2003 |
24.6 |
56.3 |
5.9 |
5.7 |
28.9 |
5.7 |
5.9 |
5.9 |
5.7 |
6.0 |
4.7 |
5.9 |
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| 210 |
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2004 |
5.9 |
11.0 |
11.0 |
18.3 |
5.9 |
27.5 |
15.7 |
5.9 |
26.3 |
7.7 |
22.8 |
52.6 |
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| 713 |
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2005 |
17.7 |
223.5 |
130.6 |
152.5 |
62.6 |
5.7 |
0.6 |
5.9 |
5.7 |
5.9 |
83.4 |
19.2 |
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| 370 |
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2006 |
90.2 |
14.8 |
5.9 |
14.9 |
45.7 |
11.5 |
85.0 |
89.4 |
5.7 |
6.6 |
0.0 |
0.0 |
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| 368 |
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2007 |
5.9 |
19.0 |
72.8 |
34.6 |
11.9 |
5.7 |
9.9 |
5.9 |
5.7 |
31.0 |
106.2 |
59.7 |
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| 390 |
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2008 |
32.8 |
5.5 |
82.1 |
5.7 |
35.2 |
108.9 |
18.3 |
75.8 |
5.7 |
7.9 |
6.0 |
5.9 |
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| 786 |
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2009 |
175.7 |
99.7 |
23.8 |
220.9 |
25.4 |
21.7 |
5.9 |
7.8 |
5.7 |
149.1 |
50.6 |
0.0 |
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| Discharge is estimated directly via a rating equation from
the remote sensing data (M/C ratio) shown below. |
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