Site ID:

1290

Lat.

-13.2933

Malawi

Central

River:

Bua

Long.

33.3010

Site name:

Old Bua Bridge

Contributing area:

2136

km2

Ratio to Comparison Station:

0.09

Latest measurement:

16-Nov-09

Mean annual runoff:

602

(2003-2007)

Hydrologic status:

Normal flow

Total runoff this year:

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:

882

m3/sec

(from Log Pearson III analysis)

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

784

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

149

2002

no data

3.0

12.3

4.2

4.0

125.6

862

2003

217.0

187.9

182.0

209.5

4.2

4.0

4.2

4.0

4.2

3.1

38.1

301

2004

5.5

19.9

5.5

4.0

4.2

4.0

4.2

4.0

4.2

53.6

187.5

271

2005

85.2

38.6

12.8

4.0

4.2

4.0

0.5

4.0

4.2

23.6

85.7

362

2006

23.2

19.4

213.9

81.6

4.2

4.0

4.2

3.6

4.0

4.2

0.0

1216

2007

203.5

553.1

366.3

4.0

4.2

4.0

4.2

4.0

4.2

3.9

60.2

2008

4.2

9.7

4.2

4.0

4.2

3.6

4.2

4.0

4.2

4.0

32.5

563

2009

5.4

242.1

179.5

98.7

4.2

4.0

4.2

4.0

4.2

12.8

0.0

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