Site ID: 1577 Lat. -15.4389 Madagascar Mahajanga
River: Sofia Long. 47.7773
Site name: Port-Berge Contributing area: 10843 km2 Ratio to Comparison Station: 0.38
Latest measurement: 5-Sep-11 Mean annual runoff: 1067 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 1231.3 mm
Latest M/C ratio: 1.13 Seven day total: 17.9 mm
Estimated current discharge: 328 m3/sec Percent of mean 7-day total: 94.0 % (today's value compared to mean for same period, 2003-2009)
5 yr recurrence flood: 1501 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 1584 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
212 2002 no data no data no data no data no data no data no data 44.3 44.6 48.3 42.3 32.5
832 2003 85.2 106.9 104.4 94.0 81.8 67.3 64.2 57.5 50.6 49.5 39.3 31.5
765 2004 47.8 88.2 106.6 72.5 75.1 62.0 63.7 55.4 55.2 56.1 40.5 42.0
882 2005 58.1 62.2 87.1 130.0 107.0 74.7 56.8 72.9 64.8 67.2 45.1 55.6
924 2006 71.2 106.4 180.9 111.1 95.8 80.3 83.8 68.5 70.5 55.0 0.0 0.0
1360 2007 114.3 152.8 216.2 186.0 132.4 113.0 98.7 91.1 74.1 69.2 55.3 56.9
1382 2008 113.1 177.7 180.6 153.9 137.3 102.0 107.7 89.9 82.0 75.9 70.5 91.7
1322 2009 142.5 121.3 143.2 166.2 138.6 121.5 101.3 87.2 78.3 75.9 60.8 84.9
1231 2010 89.4 124.3 155.7 154.1 116.9 100.7 90.9 78.5 73.1 68.3 59.1 120.3
Mean Annual Runoff (mm): 1067 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-02 295
23-Jul-02 295
24-Jul-02 264
25-Jul-02 264
26-Jul-02 207
27-Jul-02 231
28-Jul-02 247
29-Jul-02 239
30-Jul-02 250
31-Jul-02 236
1-Aug-02 218
2-Aug-02
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 256
10-Aug-02 256
11-Aug-02 277
12-Aug-02 262
13-Aug-02 271
14-Aug-02 245
15-Aug-02 227
16-Aug-02 226
17-Aug-02 199
18-Aug-02 223
19-Aug-02 223
20-Aug-02 216
21-Aug-02 227
22-Aug-02 232
23-Aug-02 232
24-Aug-02 240
25-Aug-02 229
26-Aug-02 229
27-Aug-02 222
28-Aug-02 213
29-Aug-02 209
30-Aug-02 215
31-Aug-02 214
1-Sep-02 229
2-Sep-02 237
3-Sep-02 241
4-Sep-02 241
5-Sep-02 215
6-Sep-02 241
7-Sep-02 242
8-Sep-02 214
9-Sep-02 227
10-Sep-02 181
11-Sep-02 181
12-Sep-02 237
13-Sep-02 237
14-Sep-02 268
15-Sep-02 268
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 188
22-Sep-02 181
23-Sep-02 181
24-Sep-02 214
25-Sep-02 229
26-Sep-02 251
27-Sep-02 251
28-Sep-02 218
29-Sep-02 211
30-Sep-02 223
1-Oct-02 221
2-Oct-02 221
3-Oct-02 223
4-Oct-02 212
5-Oct-02 209
6-Oct-02 209
7-Oct-02 202
8-Oct-02 202
9-Oct-02 197
10-Oct-02 175
11-Oct-02 165
12-Oct-02 133
13-Oct-02 133
14-Oct-02 176
15-Oct-02 198
16-Oct-02 220
17-Oct-02 221
18-Oct-02 224
19-Oct-02 197
20-Oct-02 194
21-Oct-02 187
22-Oct-02 187
23-Oct-02 236
24-Oct-02 217
25-Oct-02 218
26-Oct-02 207
27-Oct-02 182
28-Oct-02 180
29-Oct-02 180
30-Oct-02 170
31-Oct-02 169
1-Nov-02 166
2-Nov-02 164
3-Nov-02 163
4-Nov-02 184
5-Nov-02 193
6-Nov-02 200
7-Nov-02 200
8-Nov-02 161
9-Nov-02 174
10-Nov-02 177
11-Nov-02 174
12-Nov-02 184
13-Nov-02 143
14-Nov-02 143
15-Nov-02 171
16-Nov-02 176
17-Nov-02 190
18-Nov-02 214
19-Nov-02 208
20-Nov-02 191
21-Nov-02 209
22-Nov-02 144
23-Nov-02 144
24-Nov-02 159
25-Nov-02 205
26-Nov-02 234
27-Nov-02 186
28-Nov-02 195
29-Nov-02 128
30-Nov-02 128
1-Dec-02 156
2-Dec-02 97
3-Dec-02 55
4-Dec-02 66
5-Dec-02 45
6-Dec-02 130
7-Dec-02 182
8-Dec-02 211
9-Dec-02 211
10-Dec-02 107
11-Dec-02 119
12-Dec-02 104
13-Dec-02 98
14-Dec-02 117
15-Dec-02 47
16-Dec-02 47
17-Dec-02 57
18-Dec-02 88
19-Dec-02 142
20-Dec-02 160
21-Dec-02 176
22-Dec-02 190
23-Dec-02 220
24-Dec-02 76
25-Dec-02 76
26-Dec-02 141
27-Dec-02 172
28-Dec-02 219
29-Dec-02 192
30-Dec-02 185
31-Dec-02 190
1-Jan-03 190
2-Jan-03 217
3-Jan-03 220
4-Jan-03 209
5-Jan-03 204
6-Jan-03 207
7-Jan-03 194
8-Jan-03 189
9-Jan-03 308
10-Jan-03 308
11-Jan-03 370
12-Jan-03 380
13-Jan-03 354
14-Jan-03 173
15-Jan-03 113
16-Jan-03 108
17-Jan-03 108
18-Jan-03 446
19-Jan-03 536
20-Jan-03 481
21-Jan-03 515
22-Jan-03 513
23-Jan-03 459
24-Jan-03 592
25-Jan-03 475
26-Jan-03 475
27-Jan-03 534
28-Jan-03 453
29-Jan-03 480
30-Jan-03 487
31-Jan-03 387
1-Feb-03 572
2-Feb-03 572
3-Feb-03 661
4-Feb-03 576
5-Feb-03 422
6-Feb-03 469
7-Feb-03 398
8-Feb-03 400
9-Feb-03 518
10-Feb-03 498
11-Feb-03 498
12-Feb-03 504
13-Feb-03 489
14-Feb-03 440
15-Feb-03 400
16-Feb-03 391
17-Feb-03 427
18-Feb-03 427
19-Feb-03 418
20-Feb-03 509
21-Feb-03 449
22-Feb-03 461
23-Feb-03 512
24-Feb-03 467
25-Feb-03 528
26-Feb-03 500
27-Feb-03 500
28-Feb-03 405
1-Mar-03 396
2-Mar-03 375
3-Mar-03 427
4-Mar-03 453
5-Mar-03 463
6-Mar-03 463
7-Mar-03 398
8-Mar-03 489
9-Mar-03 232
10-Mar-03 211
11-Mar-03 211
12-Mar-03 168
13-Mar-03 252
14-Mar-03 422
15-Mar-03 422
16-Mar-03 639
17-Mar-03 568
18-Mar-03 570
19-Mar-03 545