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: December 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

80

N/A

3,421

3,179

1,341

5,668

5437500

 Rock River near Joslin

9,549

72

N/A

5,264

4,887

1,984

9,271

5446500

 Pecatonica River at Freeport

1,326

96

N/A

707

601

303

1,261

5435500

 Green River near Geneseo

1,003

76

N/A

502

382

85

1,033

5447500

 Edwards River near New Boston

445

77

147

194

114

16

410

5466500

 Kankakee River at Momence

2,294

97

N/A

2,061

1,745

826

3,787

5520500

 Iroquois River near Chebanse

2,091

91

1,996

1,613

1,041

132

4,024

5526000

 Fox River at Dayton

2,642

95

2,086

1,559

1,273

491

3,083

5552500

 Vermilion River at Pontiac

579

71

504

378

160

7

1,065

5554500

 Spoon River at Seville

1,636

98

730

706

400

65

1,511

5570000

 LaMoine River at Ripley

1,293

91

154

517

240

29

1,307

5585000

 Bear Creek near Marcelline

349

70

16

151

35

1

485

5495500

 Mackinaw River near Congerville

767

66

508

436

204

15

1,398

5567500

 Salt Creek near Greenview

1,804

73

1,253

1,089

533

105

2,650

5582000

 Sangamon River at Monticello

550

102

473

362

183

12

1,054

5572000

 So. Fork Sangamon near Rochester

867

65

241

558

136

8

1,642

5576000

 Illinois River at Valley City

26,743

76

21,220

18,250

14,987

6,722

36,545

5586100

 Macoupin Creek near Kane

868

86

93

479

151

8

1,419

5587000

 Vermilion River near Danville

1,290

93

1,050

943

560

61

2,622

3339000

 Kaskaskia River at Vandalia

1,940

45

1,157

1,971

1,649

199

4,917

5592500

 Shoal Creek near Breese

735

71

402

582

190

18

1,714

5594000

 Embarras River at Ste. Marie

1,516

101

958

1,298

805

38

3,457

3345500

 Skillet Fork at Wayne City

464

95

88

446

248

5

1,246

3380500

 Little Wabash below Clay City

1,131

100

419

1,072

522

22

2,691

3379500

 Big Muddy at Plumfield

794

44

378

699

310

43

1,877

5597000

 Cache River at Forman

244

91

159

354

215

13

860

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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