Site ID:

969

Lat.

40.9236

USA

Illinois

River:

Illinois

Long.

-89.4516

Site name:

Chillicothe

Contributing area:

35166

km2

Ratio to Comparison Station:

1.51

Latest measurement:

27-Oct-09

Mean annual runoff:

191

(2003-2007)

Hydrologic status:

Normal flow

Total runoff this year:

313

Latest M/C ratio:

1.27

Seven day total:

Estimated current discharge:

647

m3/sec

Percent of mean 7-day total:

177.4

(today's value compared to mean for same period, 2003-2007)

Ice-cover determination:

5 yr recurrence flood:

1285

m3/sec

(from Log Pearson III analysis)

Status Codes: 1 = Low flow, 2 = Normal flow, 3 = Flood, 4 = Major Flood

1195

m3/sec

(from Gumbel Extreme Value analysis)

Comparison Station Information:

Tokwe Confluence D/s C/s (1495240)

Contributing Area:

7280

sq mi

23237

sq km

(Data from this gaging station are used for the calibration to discharge, with an adjustment for different contributing areas)

Notes:

Comparison station is placeholder, only; this site is not yet calibrated to actual discharge

Discharge and runoff, based on satellite remote sensing (NASA AMSR-E data)

(For U.S, sites, nearby ground station discharge may also be shown)

2008-Present

2002-Present

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

2002

no data

12.2

3.5

9.9

3.0

0.3

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

2004

3.4

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

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

276

2009

6.2

8.4

25.5

30.1

26.6

53.7

17.0

27.3

30.8

50.9

0.0

Discharge is estimated directly via a rating equation from the remote sensing data (M/C ratio) shown below.