Site ID:

1131

Lat.

-3.7900

Brazil

River:

Mearim

Long.

-44.6805

Site name:

Contributing area:

29350

km2

Ratio to Comparison Station:

1.26

Latest measurement:

16-Nov-09

Mean annual runoff:

368

(2003-2007)

Hydrologic status:

Normal flow

Total runoff this year:

362

Latest M/C ratio:

1.21

Seven day total:

Estimated current discharge:

406

m3/sec

Percent of mean 7-day total:

116.1

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

Ice-cover determination:

5 yr recurrence flood:

1722

m3/sec

(from Log Pearson III analysis)

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

1680

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

122

2002

no data

22.9

13.0

33.3

32.5

20.4

353

2003

8.0

10.7

32.9

50.0

49.7

52.2

29.5

24.5

27.2

30.0

19.8

18.8

434

2004

11.4

56.5

82.3

80.7

55.7

36.5

39.1

32.2

14.6

11.1

4.7

9.1

298

2005

1.1

15.0

33.8

42.7

31.7

34.5

20.0

22.3

39.3

24.2

20.8

12.3

399

2006

4.5

3.4

8.1

21.7

97.8

88.5

57.9

45.6

39.7

31.4

0.0

357

2007

7.3

5.7

34.7

43.3

64.8

52.7

39.2

35.8

36.0

15.0

20.6

1.8

362

2008

5.1

3.5

12.7

71.3

92.8

67.7

33.9

29.1

15.5

11.6

6.1

12.9

697

2009

14.5

3.3

27.8

42.5

120.9

158.4

100.6

82.2

76.1

49.5

21.4

0.0

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