Site ID: 509 Lat. 38.9013 USA Illinois
River: Mississippi Long. -90.6360
Site name: Grafton Contributing area: 372210 km2 Ratio to Comparison Station: 13.18
Latest measurement: 18-Jul-10 Mean annual runoff: 39 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 13.2 mm
Latest M/C ratio: 1.28 Seven day total: 1.4 mm
Estimated current discharge: 712 m3/sec Percent of mean 7-day total: 228.1 % (today's value compared to mean for same period, 2003-2009)
5 yr recurrence flood: 1762 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 2070 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
18 2002 no data no data no data no data no data no data no data 2.8 2.3 3.4 4.9 5.1
42 2003 2.4 1.3 2.2 3.2 4.4 4.3 4.4 5.2 2.6 4.2 4.3 3.7
52 2004 3.5 1.2 4.2 4.9 3.3 6.3 4.5 4.9 4.0 4.9 5.2 4.8
37 2005 2.4 3.5 3.6 3.2 2.8 3.9 0.6 2.7 2.0 3.2 4.7 4.6
20 2006 3.8 2.1 0.9 2.5 2.4 0.9 1.1 2.3 1.6 2.1 0.0 0.0
32 2007 1.9 0.1 2.5 4.3 3.5 2.6 2.3 3.3 2.4 3.3 4.3 1.6
57 2008 2.0 1.3 2.2 4.8 7.7 7.9 10.1 5.4 3.7 4.1 4.8 2.5
32 2009 2.2 2.9 3.6 3.5 2.7 1.8 1.4 1.3 0.8 2.4 6.3 3.4
13 2010 0.0 0.6 2.4 3.8 0.5 1.7 4.1 0.0 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 39 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-02 667
23-Jul-02 667
24-Jul-02 546
25-Jul-02 533
26-Jul-02 497
27-Jul-02 681
28-Jul-02 697
29-Jul-02 739
30-Jul-02 946
31-Jul-02 893
1-Aug-02 933
2-Aug-02 845
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02
10-Aug-02 394
11-Aug-02 644
12-Aug-02 611
13-Aug-02 699
14-Aug-02 741
15-Aug-02 496
16-Aug-02 452
17-Aug-02 471
18-Aug-02 513
19-Aug-02 638
20-Aug-02 714
21-Aug-02 505
22-Aug-02 427
23-Aug-02 425
24-Aug-02 321
25-Aug-02 234
26-Aug-02 227
27-Aug-02 311
28-Aug-02 312
29-Aug-02 280
30-Aug-02 411
31-Aug-02 330
1-Sep-02 305
2-Sep-02 360
3-Sep-02 284
4-Sep-02 478
5-Sep-02 327
6-Sep-02 392
7-Sep-02 390
8-Sep-02 284
9-Sep-02 567
10-Sep-02 602
11-Sep-02 568
12-Sep-02 533
13-Sep-02 450
14-Sep-02 450
15-Sep-02 503
16-Sep-02 539
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 78
22-Sep-02 153
23-Sep-02 235
24-Sep-02 235
25-Sep-02 283
26-Sep-02 318
27-Sep-02 412
28-Sep-02 331
29-Sep-02 339
30-Sep-02 353
1-Oct-02 302
2-Oct-02 458
3-Oct-02 599
4-Oct-02 655
5-Oct-02 383
6-Oct-02 471
7-Oct-02 575
8-Oct-02 606
9-Oct-02 687
10-Oct-02 665
11-Oct-02 591
12-Oct-02 548
13-Oct-02 501
14-Oct-02 469
15-Oct-02 501
16-Oct-02 533
17-Oct-02 593
18-Oct-02 557
19-Oct-02 516
20-Oct-02 334
21-Oct-02 256
22-Oct-02 308
23-Oct-02 345
24-Oct-02 504
25-Oct-02 441
26-Oct-02 462
27-Oct-02 355
28-Oct-02 221
29-Oct-02 458
30-Oct-02 356
31-Oct-02 520
1-Nov-02 536
2-Nov-02 612
3-Nov-02 641
4-Nov-02 615
5-Nov-02 600
6-Nov-02 555
7-Nov-02 581
8-Nov-02 638
9-Nov-02 728
10-Nov-02 835
11-Nov-02 917
12-Nov-02 892
13-Nov-02 710
14-Nov-02 779
15-Nov-02 801
16-Nov-02 673
17-Nov-02 714
18-Nov-02 736
19-Nov-02 675
20-Nov-02 806
21-Nov-02 875
22-Nov-02 732
23-Nov-02 769
24-Nov-02 746
25-Nov-02 745
26-Nov-02 726
27-Nov-02 680
28-Nov-02 607
29-Nov-02 495
30-Nov-02 650
1-Dec-02 722
2-Dec-02 760
3-Dec-02 710
4-Dec-02 690
5-Dec-02 603
6-Dec-02 648
7-Dec-02 565
8-Dec-02 576
9-Dec-02 581
10-Dec-02 588
11-Dec-02 576
12-Dec-02 586
13-Dec-02 579
14-Dec-02 610
15-Dec-02 662
16-Dec-02 788
17-Dec-02 836
18-Dec-02 852
19-Dec-02 736
20-Dec-02 1025
21-Dec-02 1024
22-Dec-02 1026
23-Dec-02 1214
24-Dec-02 1022
25-Dec-02 896
26-Dec-02 756
27-Dec-02 588
28-Dec-02 505
29-Dec-02 430
30-Dec-02 399
31-Dec-02 383
1-Jan-03 404
2-Jan-03 583
3-Jan-03 793
4-Jan-03 696
5-Jan-03 856
6-Jan-03 573
7-Jan-03 417
8-Jan-03 336
9-Jan-03 449
10-Jan-03 653
11-Jan-03 671
12-Jan-03 738
13-Jan-03 629
14-Jan-03 559
15-Jan-03 471
16-Jan-03 437
17-Jan-03 353
18-Jan-03 295
19-Jan-03 142
20-Jan-03 55
21-Jan-03 3
22-Jan-03 3
23-Jan-03 3
24-Jan-03 3
25-Jan-03 46
26-Jan-03 88
27-Jan-03 43
28-Jan-03 55
29-Jan-03 34
30-Jan-03 3
31-Jan-03 3
1-Feb-03 3
2-Feb-03 3
3-Feb-03 8
4-Feb-03 219
5-Feb-03 260
6-Feb-03 408
7-Feb-03 430
8-Feb-03 431
9-Feb-03 367
10-Feb-03 256
11-Feb-03 273
12-Feb-03 332
13-Feb-03 324
14-Feb-03 309
15-Feb-03 290
16-Feb-03 3
17-Feb-03 3
18-Feb-03 3
19-Feb-03 3
20-Feb-03 3
21-Feb-03 3
22-Feb-03 57
23-Feb-03 159
24-Feb-03 163
25-Feb-03 361
26-Feb-03 321
27-Feb-03 237
28-Feb-03 180
1-Mar-03 138
2-Mar-03 216
3-Mar-03 270
4-Mar-03 419
5-Mar-03 513
6-Mar-03 140
7-Mar-03 61
8-Mar-03 127
9-Mar-03 202
10-Mar-03 351
11-Mar-03 558
12-Mar-03 512
13-Mar-03 402
14-Mar-03 98
15-Mar-03 124
16-Mar-03 195
17-Mar-03 293
18-Mar-03 530
19-Mar-03 513
20-Mar-03 201