Provisional Monthly Streamflow Network - Data Details, Illinois State Water Survey

Water and Atmospheric Resources Monitoring Program (WARM)

Weather Soil Groundwater Sediment Streamflow Reservoirs

Provisional Monthly Streamflow Network - Tabular Data: November 2016

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Long-term monthly flows for period of record (cfs)

Station Drainage area
(sq. mi.)
Years of record Monthly mean flow (cfs) Mean flow* Median (50% exceedence) flow 90% exceedence flow 10% exceedence flow USGS
Station No.
 Rock River at Rockton

6,363

82

6,851

3,582

3,374

1,397

6,216

5437500

 Rock River near Joslin

9,549

74

9,559

5,266

4,826

1,935

9,241

5446500

 Pecatonica River at Freeport

1,326

98

1,321

763

675

334

1,275

5435500

 Green River near Geneseo

1,003

78

473

450

327

82

1,195

5447500

 Edwards River near New Boston

445

79

115

167

82

18

447

5466500

 Kankakee River at Momence

2,294

99

2,979

1,584

1,249

673

2,795

5520500

 Iroquois River near Chebanse

2,091

93

1,183

979

458

96

2,571

5526000

 Fox River at Dayton

2,642

97

1,986

1,501

1,322

506

2,977

5552500

 Vermilion River at Pontiac

579

73

473

246

58

7

764

5554500

 Spoon River at Seville

1,636

100

788

610

329

61

1,649

5570000

 LaMoine River at Ripley

1,293

93

291

526

193

25

1,280

5585000

 Bear Creek near Marcelline

349

72

11

154

24

1

356

5495500

 Mackinaw River near Congerville

767

68

553

287

66

11

789

5567500

 Salt Creek near Greenview

1,804

75

840

840

277

116

2,405

5582000

 Sangamon River at Monticello

550

104

337

251

80

9

771

5572000

 So. Fork Sangamon near Rochester

867

67

69

306

84

4

807

5576000

 Illinois River at Valley City

26,743

78

17,440

14,740

11,505

5,846

26,577

5586100

 Macoupin Creek near Kane

868

88

91

340

90

8

846

5587000

 Vermilion River near Danville

1,290

95

833

620

271

53

1,355

3339000

 Kaskaskia River at Vandalia

1,940

47

718

930

644

65

2,239

5592500

 Shoal Creek near Breese

735

73

363

331

123

15

865

5594000

 Embarras River at Ste. Marie

1,516

103

522

738

317

28

1,817

3345500

 Skillet Fork at Wayne City

464

97

123

263

89

2

734

3380500

 Little Wabash below Clay City

1,131

102

290

580

230

14

1,524

3379500

 Big Muddy at Plumfield

794

46

260

398

116

41

1,063

5597000

 Cache River at Forman

244

93

38

192

84

4

571

3612000



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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 2015.

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Streamflow Data



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