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: 0.08
Latest measurement: 30-Jul-10 Mean annual runoff: 524 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 665.3 mm
Latest M/C ratio: 1.10 Seven day total: 0.9 mm
Estimated current discharge: 3 m3/sec Percent of mean 7-day total: 125.0 % (today's value compared to mean for same period, 2003-2009)
5 yr recurrence flood: 794 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 791 m3/sec (from Gumbel Extreme Value analysis)
Comparison Station Information:  Boluo (2186950)           Contributing Area:   sq mi 28239 sq km
(Data from this gaging station are used for the calibration to discharge, with an adjustment for different contributing areas)
Notes: Final calibration to discharge has not yet been accomplished.
Discharge and runoff, based on satellite remote sensing (NASA AMSR-E data)
(For U.S, sites, nearby ground station discharge may also be shown)
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 no data no data no data no data no data 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 4.2 4.0 4.2 3.1 38.1
301 2004 5.5 19.9 5.5 4.0 4.2 4.0 4.2 4.2 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 4.0 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 0.0
1216 2007 203.5 553.1 366.3 4.0 4.2 4.0 4.2 4.2 4.0 4.2 3.9 60.2
83 2008 4.2 9.7 4.2 4.0 4.2 3.6 4.2 4.2 4.0 4.2 4.0 32.5
570 2009 5.4 242.1 179.5 98.7 4.2 4.0 4.2 4.2 4.0 4.2 10.0 9.8
665 2010 16.2 64.8 550.1 21.7 4.0 4.0 4.2 0.3 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 524 Standard Deviation: 6.4
Trend in Annual Runoff (slope):  -73
Discharge is estimated via a rating equation directly from the remote sensing data (M/C ratio) shown below.
Green line records upwelling microwave emission from within 5 km radius of a calbration land target. 
Explanation:   Blue line is emission from within 5 km radius of the measurement target centered over the river.
Brown line is their ratio (M/C; "HR" in Brakenridge et al 2007; scale on right) and is used to estimate river discharge via a rating equation.
Rating equations are being developed and applied on an individual basis using available ground-based discharge information.
GoogleEarth View of Measurement Site
Return
Estimated
Disharge
Data
Date m3/sec
22-Jul-02 3
23-Jul-02 3
24-Jul-02 3
25-Jul-02 3
26-Jul-02 3
27-Jul-02 3
28-Jul-02 3
29-Jul-02 3
30-Jul-02 3
31-Jul-02 3
1-Aug-02
2-Aug-02
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02
10-Aug-02 3
11-Aug-02 3
12-Aug-02 3
13-Aug-02 3
14-Aug-02 3
15-Aug-02 3
16-Aug-02 3
17-Aug-02 3
18-Aug-02 3
19-Aug-02 3
20-Aug-02 3
21-Aug-02 3
22-Aug-02 3
23-Aug-02 3
24-Aug-02 3
25-Aug-02 3
26-Aug-02 3
27-Aug-02 3
28-Aug-02 3
29-Aug-02 3
30-Aug-02 3
31-Aug-02 3
1-Sep-02 3
2-Sep-02 3
3-Sep-02 3
4-Sep-02 3
5-Sep-02 3
6-Sep-02 3
7-Sep-02 3
8-Sep-02 3
9-Sep-02 3
10-Sep-02 3
11-Sep-02 3
12-Sep-02 3
13-Sep-02 3
14-Sep-02 3
15-Sep-02 224
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 3
22-Sep-02 3
23-Sep-02 3
24-Sep-02 3
25-Sep-02 3
26-Sep-02 3
27-Sep-02 3
28-Sep-02 3
29-Sep-02 3
30-Sep-02 3
1-Oct-02 3
2-Oct-02 3
3-Oct-02 3
4-Oct-02 3
5-Oct-02 3
6-Oct-02 3
7-Oct-02 3
8-Oct-02 3
9-Oct-02 3
10-Oct-02 3
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30-Oct-02 3
31-Oct-02 3
1-Nov-02 3
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27-Nov-02 3
28-Nov-02 3
29-Nov-02 3
30-Nov-02 3
1-Dec-02 3
2-Dec-02 3
3-Dec-02 3
4-Dec-02 3
5-Dec-02 3
6-Dec-02 3
7-Dec-02 3
8-Dec-02 3
9-Dec-02 3
10-Dec-02 3
11-Dec-02 3
12-Dec-02 3
13-Dec-02 3
14-Dec-02 526
15-Dec-02 526
16-Dec-02 431
17-Dec-02 301
18-Dec-02 42
19-Dec-02 33
20-Dec-02 52
21-Dec-02 10
22-Dec-02 47
23-Dec-02 46
24-Dec-02 79
25-Dec-02 290
26-Dec-02 223
27-Dec-02 294
28-Dec-02 155
29-Dec-02 3
30-Dec-02 3
31-Dec-02 3
1-Jan-03 3
2-Jan-03 3
3-Jan-03 88
4-Jan-03 3
5-Jan-03 3
6-Jan-03 18
7-Jan-03 78
8-Jan-03 295
9-Jan-03 283
10-Jan-03 226
11-Jan-03 179
12-Jan-03 41
13-Jan-03 203
14-Jan-03 316
15-Jan-03 325
16-Jan-03 325
17-Jan-03 192
18-Jan-03 116
19-Jan-03 93
20-Jan-03 127
21-Jan-03 66
22-Jan-03 174
23-Jan-03 258
24-Jan-03 351
25-Jan-03 312
26-Jan-03 337
27-Jan-03 303
28-Jan-03 241
29-Jan-03 179
30-Jan-03 92
31-Jan-03 135
1-Feb-03 135
2-Feb-03 145
3-Feb-03 155
4-Feb-03 194
5-Feb-03 123
6-Feb-03 123
7-Feb-03 110
8-Feb-03 3
9-Feb-03 3
10-Feb-03 3
11-Feb-03 142
12-Feb-03 275
13-Feb-03 611
14-Feb-03 608
15-Feb-03 569
16-Feb-03 413
17-Feb-03 413
18-Feb-03 150
19-Feb-03 195
20-Feb-03 3
21-Feb-03 29
22-Feb-03 34
23-Feb-03 3
24-Feb-03 191
25-Feb-03 3
26-Feb-03 3
27-Feb-03 3
28-Feb-03 3
1-Mar-03 255
2-Mar-03 178
3-Mar-03 91
4-Mar-03 103
5-Mar-03 103
6-Mar-03 75
7-Mar-03 75
8-Mar-03 427
9-Mar-03 274
10-Mar-03 307
11-Mar-03 280
12-Mar-03 82
13-Mar-03 3
14-Mar-03 3
15-Mar-03 196
16-Mar-03 155
17-Mar-03 284
18-Mar-03 176
19-Mar-03 43
20-Mar-03 36
21-Mar-03 36
22-Mar-03 123
23-Mar-03 181
24-Mar-03 250
25-Mar-03 111
26-Mar-03 66
27-Mar-03 3
28-Mar-03 3
29-Mar-03 172
30-Mar-03 182
31-Mar-03 228
1-Apr-03 228
2-Apr-03 242
3-Apr-03 200
4-Apr-03 3
5-Apr-03 85
6-Apr-03 85
7-Apr-03 287
8-Apr-03 595
9-Apr-03 575
10-Apr-03 570
11-Apr-03 539
12-Apr-03 322
13-Apr-03 342
14-Apr-03 158
15-Apr-03 137
16-Apr-03 205
17-Apr-03 179
18-Apr-03 196
19-Apr-03 132
20-Apr-03 65
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1-Jun-03 3
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