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Provisional Mean Flows for March 2009 Choose another month
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Long-term
monthly flows for period of record (cfs) |
| Station No. |
Station |
Drainage area
(sq. mi.) |
Years of record |
Monthly
mean flow (cfs) |
Mean flow* |
Median (50% exceedence) flow |
90% exceedence flow |
10% exceedence flow |
|
5437500
|
Rock River at Rockton [graph]
|
6,363
|
73
|
N/A
|
7,176
|
7,851
|
2,755
|
12,629
|
|
5446500
|
Rock River near Joslin [graph]
|
9,549
|
65
|
23,480
|
10,690
|
9,505
|
3,935
|
17,965
|
|
5435500
|
Pecatonica River at Freeport [graph]
|
1,326
|
89
|
3,293
|
1,721
|
1,583
|
626
|
3,061
|
|
5447500
|
Green River near Geneseo [graph]
|
1,003
|
69
|
3,295
|
1,017
|
850
|
330
|
2,015
|
|
5466500
|
Edwards River near New Boston [graph]
|
445
|
70
|
1,620
|
487
|
381
|
138
|
918
|
|
5520500
|
Kankakee River at Momence [graph]
|
2,294
|
90
|
7,454
|
3,273
|
3,173
|
1,639
|
4,653
|
|
5526000
|
Iroquois River near Chebanse [graph]
|
2,091
|
84
|
6,943
|
3,136
|
2,628
|
689
|
6,044
|
|
5552500
|
Fox River at Dayton [graph]
|
2,642
|
88
|
7,496
|
3,263
|
2,743
|
976
|
5,915
|
|
5554500
|
Vermilion River at Pontiac [graph]
|
579
|
64
|
1,502
|
744
|
650
|
113
|
1,693
|
|
5570000
|
Spoon River at Seville [graph]
|
1,636
|
91
|
6,676
|
1,649
|
1,155
|
449
|
3,836
|
|
5585000
|
LaMoine River at Ripley [graph]
|
1,293
|
84
|
4,517
|
1,276
|
874
|
281
|
3,439
|
|
5495500
|
Bear Creek near Marcelline [graph]
|
349
|
63
|
793
|
362
|
235
|
42
|
1,001
|
|
5567500
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Mackinaw River near Congerville [graph]
|
767
|
59
|
2,067
|
927
|
669
|
119
|
2,440
|
|
5582000
|
Salt Creek near Greenview [graph]
|
1,804
|
66
|
3,128
|
2,119
|
1,702
|
435
|
4,866
|
|
5572000
|
Sangamon River at Monticello [graph]
|
550
|
95
|
784
|
716
|
606
|
139
|
1,362
|
|
5576000
|
So. Fork Sangamon near Rochester [graph]
|
867
|
58
|
583
|
1,003
|
708
|
81
|
2,436
|
|
5586100
|
Illinois River at Valley City [graph]
|
26,743
|
69
|
70,490
|
33,430
|
29,432
|
12,849
|
54,710
|
|
5587000
|
Macoupin Creek near Kane [graph]
|
868
|
79
|
328
|
875
|
559
|
87
|
2,304
|
|
3339000
|
Vermilion River near Danville [graph]
|
1,290
|
86
|
1,904
|
1,725
|
1,394
|
463
|
3,178
|
|
5592500
|
Kaskaskia River at Vandalia [graph]
|
1,940
|
38
|
1,780
|
2,956
|
2,583
|
517
|
6,185
|
|
5594000
|
Shoal Creek near Breese [graph]
|
735
|
64
|
356
|
957
|
729
|
161
|
1,940
|
|
3345500
|
Embarras River at Ste. Marie [graph]
|
1,516
|
94
|
883
|
2,166
|
1,981
|
496
|
4,477
|
|
3380500
|
Skillet Fork at Wayne City [graph]
|
464
|
88
|
552
|
793
|
728
|
112
|
1,712
|
|
3379500
|
Little Wabash below Clay City [graph]
|
1,131
|
93
|
312
|
1,726
|
1,470
|
287
|
3,447
|
|
5597000
|
Big Muddy at Plumfield [graph]
|
794
|
37
|
535
|
1,305
|
1,093
|
265
|
2,292
|
|
3612000
|
Cache River at Forman [graph]
|
244
|
84
|
441
|
597
|
436
|
191
|
1,204
|
Choose another month
Station Numbers are linked to the U.S. Geological Survey, providing more information about each station.
Notes:
Much below normal flow = 90-100% chance of exceedence.
Below normal flow = 70-90% chance of exceedence.
Normal flow = 30-70% chance of exceedence.
Above normal flow = 10-30% chance of exceedence.
Much above normal flow = 0-10% chance of exceedence.
* As reported in U.S. Geological Survey (USGS) Water Resources Data, Illinois, Water Year 2007.
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