Site ID:

1576

Lat.

-16.5157

Madagascar

Mahajanga

River:

Betsiboka

Long.

46.7005

Site name:

Ambato Boeni

Contributing area:

52404

km2

Ratio to Comparison Station:

3.11

Latest measurement:

15-Nov-09

Mean annual runoff:

1349

(2003-2007)

Hydrologic status:

Normal flow

Total runoff this year:

1477

Latest M/C ratio:

1.16

Seven day total:

Estimated current discharge:

946

m3/sec

Percent of mean 7-day total:

90.0

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

Ice-cover determination:

5 yr recurrence flood:

9823

m3/sec

(from Log Pearson III analysis)

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

9514

m3/sec

(from Gumbel Extreme Value analysis)

Comparison Station Information:

Bevoay (1389090)

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

50.7

40.2

43.7

43.1

65.1

1461

2003

176.7

196.1

241.8

187.7

111.7

103.8

95.0

85.6

72.4

66.8

56.0

67.5

1225

2004

104.2

250.7

287.0

174.5

90.6

68.7

54.7

43.2

36.6

15.4

29.9

69.8

1489

2005

185.5

205.2

275.8

189.1

131.8

95.1

57.4

81.2

59.0

50.0

58.7

99.9

951

2006

118.6

153.8

173.7

124.4

98.9

85.7

66.0

54.0

40.2

35.9

0.0

1617

2007

193.1

265.3

302.3

176.7

127.1

107.8

99.1

89.9

61.0

51.8

57.1

86.2

1477

2008

122.0

258.1

232.8

164.9

120.6

89.5

83.4

72.4

49.0

59.7

80.2

144.1

1394

2009

196.0

237.0

211.7

197.2

151.9

108.8

96.8

73.9

51.4

44.8

24.2

0.0

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