| Site ID: |
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1305 |
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Lat. |
-7.1762 |
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Tanzania |
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Iringa |
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| River: |
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Great Ruaha |
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Long. |
35.6838 |
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| Site name: |
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Ilolo |
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Contributing
area: |
37033 |
km2 |
Ratio to Comparison
Station: |
1.59 |
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| Latest measurement: |
16-Nov-09 |
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Mean annual
runoff: |
1511 |
mm |
(2003-2007) |
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| Hydrologic status: |
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2 |
Normal flow |
Total runoff
this year: |
3531 |
mm |
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| Latest M/C ratio: |
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1.69 |
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Seven day
total: |
2 |
mm |
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| Estimated current discharge: |
2642 |
m3/sec |
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Percent of
mean 7-day total: |
62.3 |
% |
(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: |
8172 |
m3/sec |
(from Log Pearson III
analysis) |
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| Status Codes: 1 = Low
flow, 2 = Normal flow, 3 = Flood, 4 = Major Flood |
|
7358 |
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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| 1674 |
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2002 |
no data |
no data |
no data |
no data |
no data |
no data |
no data |
326.2 |
368.5 |
411.6 |
345.4 |
222.3 |
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| 2734 |
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2003 |
188.7 |
168.1 |
244.5 |
229.3 |
343.0 |
285.4 |
341.1 |
280.2 |
244.4 |
243.5 |
83.1 |
82.5 |
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| 918 |
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2004 |
21.1 |
19.7 |
30.5 |
31.5 |
52.8 |
93.7 |
119.9 |
166.4 |
143.7 |
159.7 |
69.8 |
9.2 |
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| 177 |
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2005 |
23.8 |
15.7 |
11.2 |
12.2 |
11.0 |
62.9 |
11.2 |
0.4 |
0.4 |
1.2 |
0.2 |
26.9 |
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| 4 |
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2006 |
0.2 |
0.2 |
2.1 |
0.2 |
0.2 |
0.2 |
0.2 |
0.2 |
0.2 |
0.2 |
0.0 |
0.0 |
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| 3724 |
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2007 |
156.6 |
217.9 |
303.3 |
313.6 |
379.0 |
301.4 |
325.1 |
351.8 |
407.7 |
374.1 |
332.0 |
261.9 |
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| 3531 |
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2008 |
267.6 |
200.2 |
287.4 |
254.5 |
351.7 |
319.4 |
316.2 |
287.4 |
349.1 |
367.0 |
290.5 |
240.4 |
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| 2952 |
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2009 |
297.1 |
251.7 |
278.4 |
270.1 |
299.3 |
263.4 |
277.7 |
344.2 |
273.2 |
285.5 |
111.8 |
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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