Site ID:

1574

Lat.

-15.9447

Madagascar

Mahajanga

River:

Bemarivo

Long.

47.6623

Site name:

Ampasimatera

Contributing area:

7868

km2

Ratio to Comparison Station:

0.47

Latest measurement:

15-Nov-09

Mean annual runoff:

933

(2003-2007)

Hydrologic status:

Normal flow

Total runoff this year:

1113

Latest M/C ratio:

1.15

Seven day total:

Estimated current discharge:

222

m3/sec

Percent of mean 7-day total:

153.2

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

Ice-cover determination:

5 yr recurrence flood:

714

m3/sec

(from Log Pearson III analysis)

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

725

m3/sec

(from Gumbel Extreme Value analysis)

Comparison Station Information:

Antsatrana (1389500)

Contributing Area:

7280

sq mi

16866

sq km

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

Notes:

Rating equation is based on monthly mean, maximum, and minimum M/C compared to gaging station discharge values.

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

243

2002

no data

48.4

47.0

50.6

43.1

53.8

819

2003

75.3

82.8

100.9

79.4

78.2

65.5

70.5

65.4

60.5

55.5

39.1

46.4

669

2004

70.9

90.4

76.3

71.5

52.9

45.9

51.7

37.8

41.7

39.8

46.2

44.2

957

2005

57.7

56.2

103.4

139.3

119.7

89.6

65.8

94.7

71.5

68.8

37.6

52.6

903

2006

76.3

94.8

122.9

101.6

90.6

85.0

78.3

69.3

60.9

0.0

1319

2007

109.6

143.2

192.4

150.3

129.5

107.1

98.7

101.4

96.8

77.2

63.4

49.1

1113

2008

90.2

122.9

153.3

131.7

120.4

94.8

95.5

85.2

72.4

57.3

36.1

53.3

1074

2009

102.1

113.1

107.4

133.2

132.2

110.3

102.7

86.5

78.1

70.4

38.3

0.0

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