| Site ID: |
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1335 |
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Lat. |
41.6175 |
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USA |
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Iowa |
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| River: |
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Skunk |
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Long. |
-93.0865 |
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| Site name: |
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Colfax |
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Contributing
area: |
3663 |
km2 |
Ratio to Comparison
Station: |
0.02 |
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| Latest measurement: |
2-Nov-09 |
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Mean annual
runoff: |
175 |
mm |
(2003-2008) |
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| Hydrologic status: |
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2 |
Normal flow |
Total runoff
this year: |
193 |
mm |
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| Latest M/C ratio: |
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1.02 |
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Seven day
total: |
1 |
mm |
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| Estimated current discharge: |
25 |
m3/sec |
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Percent of
mean 7-day total: |
104.3 |
% |
(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: |
58 |
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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53 |
m3/sec |
(from Gumbel Extreme Value analysis) |
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| Comparison Station Information: |
Clinton,
Iowa (4119650) |
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Contributing
Area: |
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sq mi |
221704 |
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: |
Discharge calibration is
based on comparision of monthly means, minima, and maxima from an ground
comparision station in the region with adjustment for different contributing
areas |
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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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| 73 |
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2002 |
no data |
no data |
no data |
no data |
no data |
no data |
no data |
11.5 |
13.2 |
16.8 |
15.4 |
16.4 |
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| 175 |
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2003 |
17.2 |
13.6 |
15.1 |
15.4 |
14.1 |
16.2 |
15.1 |
13.5 |
15.7 |
17.1 |
13.0 |
8.7 |
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| 190 |
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2004 |
15.3 |
14.1 |
17.1 |
15.9 |
18.1 |
16.8 |
15.5 |
16.1 |
15.1 |
16.0 |
15.1 |
14.4 |
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| 167 |
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2005 |
14.0 |
12.5 |
16.5 |
16.3 |
16.6 |
16.6 |
1.7 |
11.5 |
13.1 |
15.9 |
16.4 |
16.0 |
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| 154 |
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2006 |
13.2 |
14.0 |
15.8 |
15.6 |
15.5 |
16.1 |
15.6 |
14.8 |
16.1 |
17.1 |
0.0 |
0.0 |
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| 187 |
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2007 |
16.3 |
12.7 |
11.8 |
16.2 |
20.6 |
15.7 |
18.0 |
15.6 |
15.2 |
17.6 |
15.5 |
12.3 |
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| 193 |
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2008 |
12.5 |
10.9 |
12.9 |
18.5 |
17.2 |
24.7 |
17.9 |
15.1 |
16.8 |
17.3 |
16.1 |
12.8 |
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| 158 |
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2009 |
9.0 |
14.6 |
17.6 |
17.3 |
20.2 |
16.5 |
15.2 |
13.0 |
14.9 |
16.8 |
2.9 |
0.0 |
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Mean Annual Runoff: |
28 |
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Standard Deviation: |
15 |
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Trend in Annual Runoff
(slope): |
11.02 |
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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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