Site ID:

1591

Lat.

-13.1818

Madagascar

Antsiranana

River:

Mahavavy

Long.

49.0303

Site name:

Ambilobe

Contributing area:

3289

km2

Ratio to Comparison Station:

0.14

Latest measurement:

3-Nov-09

Mean annual runoff:

811

(2003-2007)

Hydrologic status:

Normal flow

Total runoff this year:

1368

Latest M/C ratio:

1.10

Seven day total:

Estimated current discharge:

m3/sec

Percent of mean 7-day total:

100.0

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

Ice-cover determination:

5 yr recurrence flood:

935

m3/sec

(from Log Pearson III analysis)

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

912

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

2.6

2.2

2.7

2.6

36.8

847

2003

326.7

191.3

113.4

110.3

52.1

31.6

7.5

2.7

2.6

2.7

2.2

4.0

879

2004

118.0

342.4

243.4

100.0

30.1

11.2

2.7

3.4

3.1

2.7

2.6

19.7

732

2005

38.9

139.0

154.2

106.3

46.8

36.1

3.8

42.4

22.4

2.7

42.3

97.2

489

2006

150.5

58.4

131.4

67.2

24.4

19.6

20.7

6.4

3.8

6.7

0.0

1108

2007

301.2

205.9

239.7

81.9

80.5

45.4

8.1

3.9

6.1

4.8

56.7

73.9

1368

2008

102.0

193.5

221.8

155.3

110.4

96.4

48.8

10.5

41.1

2.7

130.1

254.8

1113

2009

195.9

173.8

148.1

433.8

77.6

39.9

20.2

17.7

2.6

2.7

0.5

0.0

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