Site ID: 1238 Lat. -24.7137 Namibia Mariental
River: Fish Long. 17.8814
Site name: Mariental Contributing area: 16193 km2 Ratio to Comparison Station: 0.57
Latest measurement: 29-Jul-10 Mean annual runoff: 399 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 69.9 mm
Latest M/C ratio: 1.10 Seven day total: 0.1 mm
Estimated current discharge: 3 m3/sec Percent of mean 7-day total: 7.3 % (today's value compared to mean for same period, 2003-2009)
5 yr recurrence flood: 1389 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 1356 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
138 2002 no data no data no data no data no data no data no data 10.4 20.2 49.5 29.2 28.4
114 2003 36.7 48.9 4.1 3.6 0.5 0.5 0.5 0.5 0.7 1.3 13.3 3.0
573 2004 16.0 46.9 55.0 65.8 55.8 25.9 22.8 32.1 37.5 52.5 64.1 99.0
606 2005 80.6 95.3 95.9 83.0 35.9 28.7 3.1 19.4 20.2 46.6 51.0 46.1
461 2006 77.7 68.4 81.0 61.2 33.4 12.1 15.2 27.7 32.4 51.6 0.0 0.0
431 2007 58.4 60.7 58.8 52.4 15.2 6.8 2.3 9.3 24.3 43.1 48.0 52.0
364 2008 56.0 52.3 34.9 24.1 13.8 8.1 11.4 14.6 25.6 36.3 53.8 33.5
247 2009 31.2 39.5 52.5 6.0 4.7 1.8 0.5 1.6 6.9 28.1 31.9 42.0
70 2010 17.2 8.0 21.2 18.0 4.5 0.5 0.5 0.0 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 399 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 37
25-Jul-02 37
26-Jul-02 121
27-Jul-02 91
28-Jul-02 109
29-Jul-02 113
30-Jul-02 64
31-Jul-02 125
1-Aug-02 125
2-Aug-02
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 25
10-Aug-02 25
11-Aug-02 9
12-Aug-02 19
13-Aug-02 17
14-Aug-02 25
15-Aug-02 47
16-Aug-02 49
17-Aug-02 49
18-Aug-02 73
19-Aug-02 48
20-Aug-02 17
21-Aug-02 19
22-Aug-02 3
23-Aug-02 37
24-Aug-02 78
25-Aug-02 143
26-Aug-02 143
27-Aug-02 190
28-Aug-02 190
29-Aug-02 203
30-Aug-02 207
31-Aug-02 205
1-Sep-02 113
2-Sep-02 113
3-Sep-02 105
4-Sep-02 112
5-Sep-02 134
6-Sep-02 111
7-Sep-02 79
8-Sep-02 153
9-Sep-02 196
10-Sep-02 238
11-Sep-02 238
12-Sep-02 74
13-Sep-02 74
14-Sep-02 47
15-Sep-02 47
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 53
22-Sep-02 55
23-Sep-02 55
24-Sep-02 86
25-Sep-02 103
26-Sep-02 306
27-Sep-02 306
28-Sep-02 481
29-Sep-02 326
30-Sep-02 185
1-Oct-02 185
2-Oct-02 185
3-Oct-02 304
4-Oct-02 304
5-Oct-02 268
6-Oct-02 228
7-Oct-02 286
8-Oct-02 255
9-Oct-02 263
10-Oct-02 321
11-Oct-02 234
12-Oct-02 265
13-Oct-02 265
14-Oct-02 386
15-Oct-02 382
16-Oct-02 436
17-Oct-02 402
18-Oct-02 338
19-Oct-02 283
20-Oct-02 283
21-Oct-02 276
22-Oct-02 214
23-Oct-02 254
24-Oct-02 291
25-Oct-02 292
26-Oct-02 415
27-Oct-02 424
28-Oct-02 400
29-Oct-02 400
30-Oct-02 214
31-Oct-02 220
1-Nov-02 180
2-Nov-02 195
3-Nov-02 240
4-Nov-02 347
5-Nov-02 347
6-Nov-02 418
7-Nov-02 290
8-Nov-02 183
9-Nov-02 179
10-Nov-02 111
11-Nov-02 160
12-Nov-02 190
13-Nov-02 71
14-Nov-02 71
15-Nov-02 3
16-Nov-02 3
17-Nov-02 3
18-Nov-02 3
19-Nov-02 3
20-Nov-02 3
21-Nov-02 3
22-Nov-02 41
23-Nov-02 89
24-Nov-02 198
25-Nov-02 266
26-Nov-02 336
27-Nov-02 404
28-Nov-02 429
29-Nov-02 355
30-Nov-02 355
1-Dec-02 192
2-Dec-02 143
3-Dec-02 49
4-Dec-02 83
5-Dec-02 95
6-Dec-02 163
7-Dec-02 163
8-Dec-02 197
9-Dec-02 217
10-Dec-02 191
11-Dec-02 193
12-Dec-02 184
13-Dec-02 117
14-Dec-02 128
15-Dec-02 153
16-Dec-02 153
17-Dec-02 218
18-Dec-02 170
19-Dec-02 144
20-Dec-02 92
21-Dec-02 3
22-Dec-02 47
23-Dec-02 47
24-Dec-02 279
25-Dec-02 262
26-Dec-02 260
27-Dec-02 269
28-Dec-02 228
29-Dec-02 257
30-Dec-02 305
31-Dec-02 313
1-Jan-03 313
2-Jan-03 69
3-Jan-03 6
4-Jan-03 6
5-Jan-03 3
6-Jan-03 3
7-Jan-03 15
8-Jan-03 15
9-Jan-03 353
10-Jan-03 326
11-Jan-03 401
12-Jan-03 392
13-Jan-03 333
14-Jan-03 383
15-Jan-03 391
16-Jan-03 318
17-Jan-03 318
18-Jan-03 155
19-Jan-03 105
20-Jan-03 69
21-Jan-03 87
22-Jan-03 51
23-Jan-03 128
24-Jan-03 128
25-Jan-03 310
26-Jan-03 338
27-Jan-03 345
28-Jan-03 397
29-Jan-03 359
30-Jan-03 324
31-Jan-03 427
1-Feb-03 287
2-Feb-03 287
3-Feb-03 207
4-Feb-03 173
5-Feb-03 173
6-Feb-03 326
7-Feb-03 443
8-Feb-03 315
9-Feb-03 315
10-Feb-03 60
11-Feb-03 48
12-Feb-03 275
13-Feb-03 297
14-Feb-03 301
15-Feb-03 383
16-Feb-03 303
17-Feb-03 216
18-Feb-03 216
19-Feb-03 78
20-Feb-03 479
21-Feb-03 584
22-Feb-03 591
23-Feb-03 1260
24-Feb-03 474
25-Feb-03 474
26-Feb-03 307
27-Feb-03 255
28-Feb-03 43
1-Mar-03 3
2-Mar-03 3
3-Mar-03 3
4-Mar-03 39
5-Mar-03 201
6-Mar-03 201
7-Mar-03 41
8-Mar-03 3
9-Mar-03 3
10-Mar-03 3
11-Mar-03 3
12-Mar-03 3
13-Mar-03 3
14-Mar-03 3
15-Mar-03 3
16-Mar-03 3
17-Mar-03 3
18-Mar-03 3
19-Mar-03 3
20-Mar-03 3
21-Mar-03 3
22-Mar-03 3
23-Mar-03 80
24-Mar-03 80
25-Mar-03 46
26-Mar-03 3
27-Mar-03 3
28-Mar-03 3
29-Mar-03 3
30-Mar-03 3
31-Mar-03 3
1-Apr-03 3
2-Apr-03 3
3-Apr-03 3
4-Apr-03 16
5-Apr-03 16
6-Apr-03 3
7-Apr-03 3
8-Apr-03 3
9-Apr-03 3
10-Apr-03 3
11-Apr-03 3
12-Apr-03 38
13-Apr-03 88
14-Apr-03 88
15-Apr-03 119
16-Apr-03 105
17-Apr-03 3
18-Apr-03 23
19-Apr-03 34
20-Apr-03 16
21-Apr-03 64
22-Apr-03 3
23-Apr-03 3
24-Apr-03 3
25-Apr-03 3
26-Apr-03 3
27-Apr-03 3
28-Apr-03 3
29-Apr-03 3
30-Apr-03 3
1-May-03 3
2-May-03 3
3-May-03 3
4-May-03 3