Site ID: 1589 Lat. -22.2905 Madagascar Fianarantsoa
River: Vohipeno Long. 47.7773
Site name: Vohipeno Contributing area: 3812 km2 Ratio to Comparison Station: 0.13
Latest measurement: 11-Jul-10 Mean annual runoff: 491 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 353.4 mm
Latest M/C ratio: 1.17 Seven day total: 11.3 mm
Estimated current discharge: 80 m3/sec Percent of mean 7-day total: 103.4 % (today's value compared to mean for same period, 2003-2009)
5 yr recurrence flood: 153 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 150 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
153 2002 no data no data no data no data no data no data no data 28.5 25.2 31.1 29.7 38.6
475 2003 42.4 39.8 47.8 52.9 52.9 45.6 40.2 33.4 34.8 31.6 20.9 32.5
587 2004 50.4 57.5 61.2 67.0 66.1 50.3 48.8 38.0 38.7 29.7 30.3 49.0
504 2005 49.7 50.3 59.2 49.6 43.0 38.5 41.2 46.1 36.8 31.2 28.9 29.4
392 2006 40.2 41.4 41.5 41.8 40.6 34.5 43.3 40.9 35.8 32.4 0.0 0.0
485 2007 36.5 43.1 59.7 54.0 42.9 44.6 43.5 40.5 37.3 28.7 27.4 26.6
482 2008 30.5 51.5 50.9 44.4 42.3 35.9 42.9 48.9 43.6 33.5 23.6 33.9
515 2009 33.7 40.8 58.0 54.6 50.9 45.8 47.0 46.0 40.9 34.8 28.5 34.1
353 2010 48.6 44.5 68.9 66.4 53.6 48.7 22.6 0.0 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 491 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 45
23-Jul-02 45
24-Jul-02 48
25-Jul-02 55
26-Jul-02 53
27-Jul-02 53
28-Jul-02 44
29-Jul-02 51
30-Jul-02 57
31-Jul-02 57
1-Aug-02 64
2-Aug-02
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 50
10-Aug-02 50
11-Aug-02 34
12-Aug-02 34
13-Aug-02 33
14-Aug-02 33
15-Aug-02 74
16-Aug-02 71
17-Aug-02 77
18-Aug-02 80
19-Aug-02 54
20-Aug-02 58
21-Aug-02 44
22-Aug-02 49
23-Aug-02 48
24-Aug-02 42
25-Aug-02 48
26-Aug-02 40
27-Aug-02 34
28-Aug-02 34
29-Aug-02 53
30-Aug-02 59
31-Aug-02 96
1-Sep-02 78
2-Sep-02 82
3-Sep-02 71
4-Sep-02 42
5-Sep-02 43
6-Sep-02 36
7-Sep-02 31
8-Sep-02 42
9-Sep-02 44
10-Sep-02 45
11-Sep-02 50
12-Sep-02 40
13-Sep-02 40
14-Sep-02 56
15-Sep-02 56
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 16
22-Sep-02 37
23-Sep-02 32
24-Sep-02 39
25-Sep-02 46
26-Sep-02 35
27-Sep-02 43
28-Sep-02 25
29-Sep-02 25
30-Sep-02 60
1-Oct-02 50
2-Oct-02 66
3-Oct-02 60
4-Oct-02 60
5-Oct-02 60
6-Oct-02 41
7-Oct-02 45
8-Oct-02 51
9-Oct-02 57
10-Oct-02 51
11-Oct-02 52
12-Oct-02 48
13-Oct-02 43
14-Oct-02 41
15-Oct-02 41
16-Oct-02 46
17-Oct-02 42
18-Oct-02 39
19-Oct-02 40
20-Oct-02 32
21-Oct-02 33
22-Oct-02 35
23-Oct-02 32
24-Oct-02 35
25-Oct-02 43
26-Oct-02 42
27-Oct-02 44
28-Oct-02 40
29-Oct-02 36
30-Oct-02 33
31-Oct-02 33
1-Nov-02 38
2-Nov-02 33
3-Nov-02 36
4-Nov-02 39
5-Nov-02 37
6-Nov-02 48
7-Nov-02 50
8-Nov-02 54
9-Nov-02 44
10-Nov-02 38
11-Nov-02 43
12-Nov-02 40
13-Nov-02 44
14-Nov-02 49
15-Nov-02 38
16-Nov-02 38
17-Nov-02 37
18-Nov-02 33
19-Nov-02 50
20-Nov-02 43
21-Nov-02 46
22-Nov-02 50
23-Nov-02 31
24-Nov-02 27
25-Nov-02 37
26-Nov-02 55
27-Nov-02 55
28-Nov-02 69
29-Nov-02 62
30-Nov-02 46
1-Dec-02 29
2-Dec-02 29
3-Dec-02 16
4-Dec-02 34
5-Dec-02 61
6-Dec-02 58
7-Dec-02 74
8-Dec-02 82
9-Dec-02 71
10-Dec-02 63
11-Dec-02 61
12-Dec-02 48
13-Dec-02 53
14-Dec-02 59
15-Dec-02 59
16-Dec-02 63
17-Dec-02 44
18-Dec-02 44
19-Dec-02 44
20-Dec-02 58
21-Dec-02 66
22-Dec-02 66
23-Dec-02 70
24-Dec-02 57
25-Dec-02 58
26-Dec-02 48
27-Dec-02 55
28-Dec-02 57
29-Dec-02 60
30-Dec-02 67
31-Dec-02 49
1-Jan-03 41
2-Jan-03 19
3-Jan-03 19
4-Jan-03 28
5-Jan-03 43
6-Jan-03 53
7-Jan-03 56
8-Jan-03 64
9-Jan-03 54
10-Jan-03 54
11-Jan-03 51
12-Jan-03 55
13-Jan-03 71
14-Jan-03 67
15-Jan-03 70
16-Jan-03 68
17-Jan-03 57
18-Jan-03 52
19-Jan-03 52
20-Jan-03 69
21-Jan-03 75
22-Jan-03 97
23-Jan-03 90
24-Jan-03 90
25-Jan-03 79
26-Jan-03 60
27-Jan-03 52
28-Jan-03 68
29-Jan-03 69
30-Jan-03 71
31-Jan-03 76
1-Feb-03 82
2-Feb-03 95
3-Feb-03 97
4-Feb-03 97
5-Feb-03 99
6-Feb-03 101
7-Feb-03 114
8-Feb-03 89
9-Feb-03 72
10-Feb-03 51
11-Feb-03 51
12-Feb-03 52
13-Feb-03 53
14-Feb-03 60
15-Feb-03 47
16-Feb-03 48
17-Feb-03 47
18-Feb-03 31
19-Feb-03 44
20-Feb-03 44
21-Feb-03 43
22-Feb-03 57
23-Feb-03 51
24-Feb-03 50
25-Feb-03 51
26-Feb-03 42
27-Feb-03 52
28-Feb-03 34
1-Mar-03 63
2-Mar-03 66
3-Mar-03 68
4-Mar-03 93
5-Mar-03 82
6-Mar-03 89
7-Mar-03 101
8-Mar-03 101
9-Mar-03 99
10-Mar-03 91
11-Mar-03 83
12-Mar-03 84
13-Mar-03 79
14-Mar-03 73
15-Mar-03 77
16-Mar-03 76
17-Mar-03 47
18-Mar-03 31
19-Mar-03 47
20-Mar-03 36
21-Mar-03 43
22-Mar-03 62
23-Mar-03 -11
24-Mar-03 -11
25-Mar-03 3
26-Mar-03 51
27-Mar-03 106
28-Mar-03 101