Site ID: 1578 Lat. -17.7573 Madagascar Toamasina
River: Lake Alaotra Long. 48.3023
Site name: Morarano Sud Contributing area: 3810 km2 Ratio to Comparison Station: 0.13
Latest measurement: 4-Sep-11 Mean annual runoff: 809 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 651.7 mm
Latest M/C ratio: 1.11 Seven day total: 5.8 mm
Estimated current discharge: 37 m3/sec Percent of mean 7-day total: 48.1 % (today's value compared to mean for same period, 2003-2009)
5 yr recurrence flood: 315 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 313 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
259 2002 no data no data no data no data no data no data no data 59.2 59.8 37.6 18.7 83.6
949 2003 145.0 88.4 94.1 80.5 100.2 87.9 87.4 81.7 50.2 59.1 26.1 48.5
535 2004 79.5 58.6 34.5 29.8 42.7 37.9 50.3 53.5 44.5 31.0 16.5 55.7
1062 2005 170.1 93.3 116.5 105.0 91.5 99.7 102.7 69.3 61.8 49.4 22.3 80.0
457 2006 104.5 73.1 43.1 37.2 45.7 38.7 34.2 33.7 26.2 20.6 0.0 0.0
1040 2007 141.5 125.9 132.3 109.1 92.9 79.2 74.5 82.6 66.4 52.0 49.2 34.8
856 2008 127.2 114.3 72.5 53.8 56.6 49.2 47.9 49.7 46.2 37.8 88.7 112.4
762 2009 113.6 83.5 67.3 62.0 77.1 59.7 51.2 55.3 43.7 39.9 27.3 81.4
652 2010 121.6 71.5 81.8 54.0 47.3 45.9 38.0 40.6 36.9 27.1 20.8 66.3
Mean Annual Runoff (mm): 809 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-02 134
23-Jul-02 134
24-Jul-02 127
25-Jul-02 166
26-Jul-02 139
27-Jul-02 139
28-Jul-02 86
29-Jul-02 102
30-Jul-02 95
31-Jul-02 95
1-Aug-02 133
2-Aug-02
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 162
10-Aug-02 162
11-Aug-02 131
12-Aug-02 131
13-Aug-02 80
14-Aug-02 103
15-Aug-02 105
16-Aug-02 117
17-Aug-02 145
18-Aug-02 156
19-Aug-02 156
20-Aug-02 124
21-Aug-02 99
22-Aug-02 72
23-Aug-02 74
24-Aug-02 74
25-Aug-02 89
26-Aug-02 87
27-Aug-02 82
28-Aug-02 82
29-Aug-02 55
30-Aug-02 90
31-Aug-02 100
1-Sep-02 94
2-Sep-02 124
3-Sep-02 114
4-Sep-02 114
5-Sep-02 147
6-Sep-02 130
7-Sep-02 96
8-Sep-02 93
9-Sep-02 74
10-Sep-02 75
11-Sep-02 92
12-Sep-02 117
13-Sep-02 117
14-Sep-02 133
15-Sep-02 133
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 78
22-Sep-02 80
23-Sep-02 72
24-Sep-02 72
25-Sep-02 70
26-Sep-02 90
27-Sep-02 108
28-Sep-02 142
29-Sep-02 142
30-Sep-02 131
1-Oct-02 118
2-Oct-02 118
3-Oct-02 91
4-Oct-02 71
5-Oct-02 55
6-Oct-02 55
7-Oct-02 57
8-Oct-02 57
9-Oct-02 36
10-Oct-02 32
11-Oct-02 30
12-Oct-02 22
13-Oct-02 28
14-Oct-02 45
15-Oct-02 45
16-Oct-02 42
17-Oct-02 45
18-Oct-02 39
19-Oct-02 58
20-Oct-02 73
21-Oct-02 61
22-Oct-02 61
23-Oct-02 46
24-Oct-02 41
25-Oct-02 51
26-Oct-02 48
27-Oct-02 42
28-Oct-02 49
29-Oct-02 46
30-Oct-02 47
31-Oct-02 47
1-Nov-02 38
2-Nov-02 42
3-Nov-02 43
4-Nov-02 42
5-Nov-02 44
6-Nov-02 33
7-Nov-02 33
8-Nov-02 28
9-Nov-02 26
10-Nov-02 30
11-Nov-02 23
12-Nov-02 21
13-Nov-02 22
14-Nov-02 15
15-Nov-02 27
16-Nov-02 27
17-Nov-02 29
18-Nov-02 27
19-Nov-02 25
20-Nov-02 34
21-Nov-02 37
22-Nov-02 32
23-Nov-02 32
24-Nov-02 15
25-Nov-02 17
26-Nov-02 15
27-Nov-02 17
28-Nov-02 18
29-Nov-02 15
30-Nov-02 20
1-Dec-02 22
2-Dec-02 22
3-Dec-02 22
4-Dec-02 23
5-Dec-02 21
6-Dec-02 25
7-Dec-02 31
8-Dec-02 22
9-Dec-02 22
10-Dec-02 33
11-Dec-02 34
12-Dec-02 52
13-Dec-02 53
14-Dec-02 51
15-Dec-02 72
16-Dec-02 76
17-Dec-02 202
18-Dec-02 202
19-Dec-02 276
20-Dec-02 281
21-Dec-02 268
22-Dec-02 268
23-Dec-02 291
24-Dec-02 126
25-Dec-02 126
26-Dec-02 128
27-Dec-02 172
28-Dec-02 188
29-Dec-02 191
30-Dec-02 211
31-Dec-02 177
1-Jan-03 180
2-Jan-03 183
3-Jan-03 183
4-Jan-03 206
5-Jan-03 217
6-Jan-03 221
7-Jan-03 218
8-Jan-03 225
9-Jan-03 195
10-Jan-03 195
11-Jan-03 190
12-Jan-03 199
13-Jan-03 200
14-Jan-03 188
15-Jan-03 184
16-Jan-03 177
17-Jan-03 176
18-Jan-03 234
19-Jan-03 234
20-Jan-03 190
21-Jan-03 205
22-Jan-03 171
23-Jan-03 192
24-Jan-03 234
25-Jan-03 225
26-Jan-03 225
27-Jan-03 231
28-Jan-03 236
29-Jan-03 243
30-Jan-03 221
31-Jan-03 213
1-Feb-03 159
2-Feb-03 126
3-Feb-03 123
4-Feb-03 123
5-Feb-03 104
6-Feb-03 126
7-Feb-03 108
8-Feb-03 125
9-Feb-03 165
10-Feb-03 166
11-Feb-03 166
12-Feb-03 154
13-Feb-03 158
14-Feb-03 118
15-Feb-03 122
16-Feb-03 118
17-Feb-03 116
18-Feb-03 148
19-Feb-03 173
20-Feb-03 173
21-Feb-03 186
22-Feb-03 174
23-Feb-03 170
24-Feb-03 150
25-Feb-03 131
26-Feb-03 103
27-Feb-03 103
28-Feb-03 112
1-Mar-03 108
2-Mar-03 90
3-Mar-03 96
4-Mar-03 86
5-Mar-03 107
6-Mar-03 139
7-Mar-03 164
8-Mar-03 164
9-Mar-03 55
10-Mar-03 97
11-Mar-03 97
12-Mar-03 107
13-Mar-03 132
14-Mar-03 169
15-Mar-03 169
16-Mar-03 210
17-Mar-03 212
18-Mar-03 159