Site ID: 969 Lat. 40.9236 USA Illinois
River: Illinois Long. -89.4516
Site name: Chillicothe Contributing area: 35166 km2 Ratio to Comparison Station: 1.25
Latest measurement: 21-Jul-10 Mean annual runoff: 229 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 141.3 mm
Latest M/C ratio: 1.22 Seven day total: 11.2 mm
Estimated current discharge: 459 m3/sec Percent of mean 7-day total: 263.7 % (today's value compared to mean for same period, 2003-2009)
5 yr recurrence flood: 1327 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 1238 m3/sec (from Gumbel Extreme Value analysis)
Comparison Station Information:  Boluo (2186950)           Contributing Area:   sq mi 28239 sq km
(Data from this gaging station are used for the calibration to discharge, with an adjustment for different contributing areas)
Notes: Final calibration to discharge 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
19 2002 no data no data no data no data no data no data no data 2.0 3.5 9.9 3.0 0.3
37 2003 2.2 0.2 0.3 11.4 2.5 4.3 4.9 1.7 4.1 3.5 1.5 0.6
11 2004 3.4 0.3 0.3 1.7 0.3 2.3 1.0 0.3 0.4 0.3 0.2 0.3
278 2005 0.3 0.2 11.0 43.7 29.7 25.0 8.3 23.3 42.2 46.4 37.1 10.7
261 2006 20.4 15.0 18.3 17.2 17.9 41.4 25.3 22.8 43.9 38.5 0.0 0.0
369 2007 10.2 0.2 13.9 20.5 49.1 41.3 27.1 28.2 68.8 55.4 48.3 5.9
313 2008 18.6 0.2 29.3 36.8 24.1 13.0 32.8 27.4 40.5 57.0 31.2 2.2
337 2009 6.2 8.4 25.5 30.1 26.6 53.7 17.0 27.3 30.8 51.9 45.8 13.4
141 2010 0.3 0.5 18.9 40.3 18.4 19.3 43.6 0.0 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 229 Standard Deviation: 6.4
Trend in Annual Runoff (slope):  -73
Discharge is estimated via a rating equation directly from the remote sensing data (M/C ratio) shown below.
Green line records upwelling microwave emission from within 5 km radius of a calbration land target. 
Explanation:   Blue line is emission from within 5 km radius of the measurement target centered over the river.
Brown line is their ratio (M/C; "HR" in Brakenridge et al 2007; 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 using available ground-based discharge information.
GoogleEarth View of Measurement Site
Return
Estimated
Disharge
Data
Date m3/sec
22-Jul-02 84
23-Jul-02 84
24-Jul-02 57
25-Jul-02 215
26-Jul-02 185
27-Jul-02 17
28-Jul-02 14
29-Jul-02 3
30-Jul-02 3
31-Jul-02 63
1-Aug-02 97
2-Aug-02 428
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02
10-Aug-02 116
11-Aug-02 3
12-Aug-02 90
13-Aug-02 21
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 97
14-Sep-02 97
15-Sep-02 6
16-Sep-02 201
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 551
22-Sep-02 35
23-Sep-02 3
24-Sep-02 3
25-Sep-02 3
26-Sep-02 3
27-Sep-02 149
28-Sep-02 195
29-Sep-02 48
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 17
8-Oct-02 23
9-Oct-02 161
10-Oct-02 259
11-Oct-02 171
12-Oct-02 280
13-Oct-02 292
14-Oct-02 242
15-Oct-02 181
16-Oct-02 303
17-Oct-02 129
18-Oct-02 145
19-Oct-02 293
20-Oct-02 231
21-Oct-02 191
22-Oct-02 279
23-Oct-02 362
24-Oct-02 174
25-Oct-02 183
26-Oct-02 80
27-Oct-02 3
28-Oct-02 3
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 3
7-Nov-02 39
8-Nov-02 3
9-Nov-02 3
10-Nov-02 3
11-Nov-02 19
12-Nov-02 209
13-Nov-02 369
14-Nov-02 226
15-Nov-02 208
16-Nov-02 3
17-Nov-02 19
18-Nov-02 3
19-Nov-02 3
20-Nov-02 3
21-Nov-02 3
22-Nov-02 3
23-Nov-02 3
24-Nov-02 3
25-Nov-02 3
26-Nov-02 3
27-Nov-02 3
28-Nov-02 3
29-Nov-02 3
30-Nov-02 60
1-Dec-02 3
2-Dec-02 3
3-Dec-02 3
4-Dec-02 3
5-Dec-02 3
6-Dec-02 3
7-Dec-02 3
8-Dec-02 3
9-Dec-02 3
10-Dec-02 3
11-Dec-02 3
12-Dec-02 3
13-Dec-02 3
14-Dec-02 3
15-Dec-02 3
16-Dec-02 3
17-Dec-02 3
18-Dec-02 3
19-Dec-02 3
20-Dec-02 3
21-Dec-02 3
22-Dec-02 3
23-Dec-02 3
24-Dec-02 3
25-Dec-02 3
26-Dec-02 3
27-Dec-02 3
28-Dec-02 3
29-Dec-02 3
30-Dec-02 3
31-Dec-02 3
1-Jan-03 3
2-Jan-03 3
3-Jan-03 3
4-Jan-03 3
5-Jan-03 3
6-Jan-03 3
7-Jan-03 3
8-Jan-03 3
9-Jan-03 68
10-Jan-03 294
11-Jan-03 305
12-Jan-03 147
13-Jan-03 8
14-Jan-03 3
15-Jan-03 3
16-Jan-03 3
17-Jan-03 3
18-Jan-03 3
19-Jan-03 3
20-Jan-03 3
21-Jan-03 3
22-Jan-03 3
23-Jan-03 3
24-Jan-03 3
25-Jan-03 3
26-Jan-03 3
27-Jan-03 3
28-Jan-03 3
29-Jan-03 3
30-Jan-03 3
31-Jan-03 3
1-Feb-03 3
2-Feb-03 3
3-Feb-03 3
4-Feb-03 3
5-Feb-03 3
6-Feb-03 3
7-Feb-03 3
8-Feb-03 3
9-Feb-03 3
10-Feb-03 3
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20-Feb-03 3
21-Feb-03 3
22-Feb-03 3
23-Feb-03 3
24-Feb-03 3
25-Feb-03 3
26-Feb-03 3
27-Feb-03 3
28-Feb-03 3
1-Mar-03 3
2-Mar-03 3
3-Mar-03 3
4-Mar-03 3
5-Mar-03 3
6-Mar-03 3
7-Mar-03 3
8-Mar-03 3
9-Mar-03 3
10-Mar-03 3
11-Mar-03 3
12-Mar-03 3
13-Mar-03 3
14-Mar-03 3
15-Mar-03 3
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17-Mar-03 3
18-Mar-03 3
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21-Mar-03 3
22-Mar-03 3
23-Mar-03 3
24-Mar-03 3
25-Mar-03 3
26-Mar-03 3
27-Mar-03 3
28-Mar-03 3
29-Mar-03 3
30-Mar-03 3
31-Mar-03 3
1-Apr-03 3
2-Apr-03 3
3-Apr-03 3
4-Apr-03 3
5-Apr-03 3
6-Apr-03 3
7-Apr-03 260
8-Apr-03 192
9-Apr-03 20
10-Apr-03 107
11-Apr-03 3
12-Apr-03 129
13-Apr-03 306
14-Apr-03 417
15-Apr-03 692
16-Apr-03 676
17-Apr-03 641
18-Apr-03 284
19-Apr-03 85
20-Apr-03 3
21-Apr-03 3
22-Apr-03 3
23-Apr-03 3