Site ID: 1305 Lat. -7.1762 Tanzania Iringa
River: Great Ruaha Long. 35.6838
Site name: Ilolo Contributing area: 37033 km2 Ratio to Comparison Station: 1.31
Latest measurement: 30-Jul-10 Mean annual runoff: 1944 mm (2003-2009)
Hydrologic status: 3 Flood Total runoff this year (2010): 1341.4 mm
Latest M/C ratio: 2.00 Seven day total: 56.0 mm
Estimated current discharge: 4386 m3/sec Percent of mean 7-day total: 136.0 % (today's value compared to mean for same period, 2003-2009)
5 yr recurrence flood: 7674 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 6850 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
1408 2002 no data no data no data no data no data no data no data 200.4 267.2 372.7 345.4 222.3
2595 2003 188.7 168.1 244.5 214.2 343.0 260.0 284.0 269.4 213.9 243.5 83.1 82.5
918 2004 21.1 19.7 30.5 31.5 52.8 93.7 119.9 166.4 143.7 159.7 69.8 9.2
177 2005 23.8 15.7 11.2 12.2 11.0 62.9 11.2 0.4 0.4 1.2 0.2 26.9
4 2006 0.2 0.2 2.1 0.2 0.2 0.2 0.2 0.2 0.2 0.2 0.0 0.0
3420 2007 156.6 217.9 294.7 313.6 354.5 291.4 248.3 288.8 335.0 346.4 310.7 261.9
3363 2008 267.6 200.2 276.8 254.5 351.7 287.0 279.0 266.2 307.3 342.1 290.5 240.4
3133 2009 283.5 251.7 278.4 270.1 299.3 250.6 269.2 340.6 252.0 285.5 198.7 153.7
1341 2010 137.0 131.4 163.9 209.0 240.0 225.3 210.0 24.7 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 1944 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 5855
23-Jul-02 5855
24-Jul-02 5855
25-Jul-02
26-Jul-02 5538
27-Jul-02 3043
28-Jul-02 3711
29-Jul-02 3651
30-Jul-02 2895
31-Jul-02 5244
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 3727
11-Aug-02 5017
12-Aug-02 5251
13-Aug-02 5584
14-Aug-02 6271
15-Aug-02 6256
16-Aug-02 6798
17-Aug-02
18-Aug-02
19-Aug-02
20-Aug-02 5539
21-Aug-02 5574
22-Aug-02 5273
23-Aug-02 5022
24-Aug-02
25-Aug-02
26-Aug-02 5019
27-Aug-02 4896
28-Aug-02 3451
29-Aug-02 4367
30-Aug-02 3901
31-Aug-02 3936
1-Sep-02 5032
2-Sep-02 4271
3-Sep-02 4271
4-Sep-02 5078
5-Sep-02 5371
6-Sep-02 5861
7-Sep-02 6369
8-Sep-02 6460
9-Sep-02 5092
10-Sep-02 5092
11-Sep-02 3692
12-Sep-02 4557
13-Sep-02 5253
14-Sep-02 5253
15-Sep-02 6528
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 5311
22-Sep-02 5311
23-Sep-02 5228
24-Sep-02 5228
25-Sep-02
26-Sep-02
27-Sep-02
28-Sep-02
29-Sep-02 7802
30-Sep-02 7484
1-Oct-02 7611
2-Oct-02 6345
3-Oct-02 5052
4-Oct-02 5272
5-Oct-02 5272
6-Oct-02 3637
7-Oct-02 4639
8-Oct-02 4708
9-Oct-02 4241
10-Oct-02 4503
11-Oct-02 4208
12-Oct-02 4208
13-Oct-02 4764
14-Oct-02 4119
15-Oct-02 2752
16-Oct-02 2474
17-Oct-02 1881
18-Oct-02 3120
19-Oct-02 4254
20-Oct-02 7390
21-Oct-02 7390
22-Oct-02 7162
23-Oct-02 6656
24-Oct-02 6241
25-Oct-02 6937
26-Oct-02 6766
27-Oct-02 5914
28-Oct-02 5914
29-Oct-02 5785
30-Oct-02 5938
31-Oct-02 4611
1-Nov-02 4611
2-Nov-02 3420
3-Nov-02 3662
4-Nov-02 6811
5-Nov-02 6060
6-Nov-02 6060
7-Nov-02 4986
8-Nov-02 5142
9-Nov-02 5057
10-Nov-02 5680
11-Nov-02 6189
12-Nov-02 5721
13-Nov-02 5721
14-Nov-02 2866
15-Nov-02 2895
16-Nov-02 3419
17-Nov-02 4183
18-Nov-02 5308
19-Nov-02 6395
20-Nov-02 6331
21-Nov-02 5107
22-Nov-02 5107
23-Nov-02 2269
24-Nov-02 3473
25-Nov-02 3108
26-Nov-02 3638
27-Nov-02 5457
28-Nov-02 5903
29-Nov-02 5903
30-Nov-02 7584
1-Dec-02 7584
2-Dec-02 4337
3-Dec-02 5049
4-Dec-02 3708
5-Dec-02 4624
6-Dec-02 6617
7-Dec-02 5048
8-Dec-02 5048
9-Dec-02 3160
10-Dec-02 2674
11-Dec-02 2198
12-Dec-02 1868
13-Dec-02 1505
14-Dec-02 3739
15-Dec-02 3739
16-Dec-02 3230
17-Dec-02 2374
18-Dec-02 451
19-Dec-02 1592
20-Dec-02 2012
21-Dec-02 3198
22-Dec-02 5431
23-Dec-02 2161
24-Dec-02 2161
25-Dec-02 955
26-Dec-02 1532
27-Dec-02 2016
28-Dec-02 1614
29-Dec-02 1790
30-Dec-02 1942
31-Dec-02 1942
1-Jan-03 3229
2-Jan-03 2487
3-Jan-03 868
4-Jan-03 1360
5-Jan-03 1360
6-Jan-03 985
7-Jan-03 1533
8-Jan-03 2411
9-Jan-03 2411
10-Jan-03 1959
11-Jan-03 2083
12-Jan-03 1066
13-Jan-03 1735
14-Jan-03 2806
15-Jan-03 2764
16-Jan-03 2764
17-Jan-03 2329
18-Jan-03 2780
19-Jan-03 1865
20-Jan-03 2526
21-Jan-03 2566
22-Jan-03 2807
23-Jan-03 4662
24-Jan-03 4871
25-Jan-03 4871
26-Jan-03 3406
27-Jan-03 3118
28-Jan-03 2178
29-Jan-03 3163
30-Jan-03 3898
31-Jan-03 4035
1-Feb-03 4035
2-Feb-03 2371
3-Feb-03 2785
4-Feb-03 2076
5-Feb-03 2923
6-Feb-03 3256
7-Feb-03 3059
8-Feb-03 5846
9-Feb-03 2121
10-Feb-03 2121
11-Feb-03 1256
12-Feb-03 2108
13-Feb-03 2102
14-Feb-03 2015
15-Feb-03 2809
16-Feb-03 2014
17-Feb-03 2014
18-Feb-03 1231
19-Feb-03 2556
20-Feb-03 2410
21-Feb-03 2775
22-Feb-03 3724
23-Feb-03 3241
24-Feb-03 4040
25-Feb-03 2285
26-Feb-03 2285
27-Feb-03 881
28-Feb-03 1724
1-Mar-03 2317
2-Mar-03 3201
3-Mar-03 4446
4-Mar-03 4973
5-Mar-03 4973
6-Mar-03 5390
7-Mar-03 5390
8-Mar-03 2599
9-Mar-03 2922
10-Mar-03 1559
11-Mar-03 1391
12-Mar-03 2234
13-Mar-03 1964
14-Mar-03 1964
15-Mar-03 3646
16-Mar-03 2697
17-Mar-03 2561
18-Mar-03 2074
19-Mar-03 1107
20-Mar-03 1525
21-Mar-03 3502
22-Mar-03 5484
23-Mar-03 5675
24-Mar-03 5331
25-Mar-03 5094
26-Mar-03 4595
27-Mar-03 4199
28-Mar-03 6031
29-Mar-03 2631
30-Mar-03 2631
31-Mar-03 686
1-Apr-03 686
2-Apr-03 603
3-Apr-03 2540
4-Apr-03 4875
5-Apr-03 3947
6-Apr-03 3947
7-Apr-03 3256
8-Apr-03 2889
9-Apr-03 1598
10-Apr-03 1793
11-Apr-03 1326
12-Apr-03 1401
13-Apr-03 2426
14-Apr-03 3175
15-Apr-03 3175
16-Apr-03 4202
17-Apr-03 3878
18-Apr-03 3848
19-Apr-03 3430
20-Apr-03 2941
21-Apr-03 2559
22-Apr-03 2559
23-Apr-03 3021
24-Apr-03 3299
25-Apr-03 4025
26-Apr-03 4012
27-Apr-03 4142
28-Apr-03 3633
29-Apr-03 3179
30-Apr-03 5423
1-May-03 5423
2-May-03 6714
3-May-03 3644