Site ID: 979 Lat. 39.0701 USA Illinois
River: Mississippi Long. -90.7010
Site name: Hardin Contributing area: 368297 km2 Ratio to Comparison Station: 13.04
Latest measurement: 21-Jul-10 Mean annual runoff: 37 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 17.2 mm
Latest M/C ratio: 1.29 Seven day total: 1.4 mm
Estimated current discharge: 723 m3/sec Percent of mean 7-day total: 128.9 % (today's value compared to mean for same period, 2003-2009)
5 yr recurrence flood: 1539 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 1794 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
9 2002 no data no data no data no data no data no data no data 1.7 1.5 1.6 2.0 1.9
23 2003 0.8 0.3 1.0 2.4 4.1 3.0 2.1 3.1 1.4 1.6 1.7 1.0
19 2004 0.7 0.6 1.9 3.4 2.4 3.9 2.2 1.6 0.4 0.9 0.6 0.5
37 2005 0.2 0.7 3.1 3.9 4.5 4.0 0.7 4.0 4.3 4.2 4.1 3.3
36 2006 3.9 3.3 3.5 4.6 4.5 2.0 3.3 3.7 3.6 3.3 0.0 0.0
43 2007 1.3 0.2 4.1 5.8 4.5 4.1 3.9 5.1 4.6 4.5 4.1 1.1
59 2008 1.2 1.1 2.3 4.0 7.0 7.8 11.3 6.4 5.9 6.0 4.4 1.7
42 2009 1.6 2.7 4.1 4.2 4.9 3.3 3.3 3.3 2.5 3.5 5.7 3.1
17 2010 0.1 0.6 3.4 4.1 2.2 2.3 4.7 0.0 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 37 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-02 282
23-Jul-02 282
24-Jul-02 239
25-Jul-02 304
26-Jul-02 346
27-Jul-02 393
28-Jul-02 421
29-Jul-02 290
30-Jul-02 303
31-Jul-02 281
1-Aug-02 88
2-Aug-02 342
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02
10-Aug-02 381
11-Aug-02 379
12-Aug-02 358
13-Aug-02 432
14-Aug-02 373
15-Aug-02 364
16-Aug-02 351
17-Aug-02 362
18-Aug-02 506
19-Aug-02 462
20-Aug-02 593
21-Aug-02 337
22-Aug-02 313
23-Aug-02 340
24-Aug-02 117
25-Aug-02 89
26-Aug-02 3
27-Aug-02 215
28-Aug-02 222
29-Aug-02 291
30-Aug-02 307
31-Aug-02 151
1-Sep-02 150
2-Sep-02 135
3-Sep-02 246
4-Sep-02 285
5-Sep-02 342
6-Sep-02 308
7-Sep-02 366
8-Sep-02 424
9-Sep-02 291
10-Sep-02 389
11-Sep-02 195
12-Sep-02 238
13-Sep-02 310
14-Sep-02 310
15-Sep-02 309
16-Sep-02 298
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 3
22-Sep-02 3
23-Sep-02 77
24-Sep-02 77
25-Sep-02 217
26-Sep-02 413
27-Sep-02 364
28-Sep-02 289
29-Sep-02 208
30-Sep-02 320
1-Oct-02 189
2-Oct-02 276
3-Oct-02 387
4-Oct-02 254
5-Oct-02 250
6-Oct-02 173
7-Oct-02 345
8-Oct-02 295
9-Oct-02 374
10-Oct-02 472
11-Oct-02 184
12-Oct-02 193
13-Oct-02 209
14-Oct-02 259
15-Oct-02 336
16-Oct-02 344
17-Oct-02 229
18-Oct-02 217
19-Oct-02 236
20-Oct-02 37
21-Oct-02 152
22-Oct-02 195
23-Oct-02 202
24-Oct-02 331
25-Oct-02 225
26-Oct-02 159
27-Oct-02 21
28-Oct-02 3
29-Oct-02 118
30-Oct-02 93
31-Oct-02 246
1-Nov-02 230
2-Nov-02 176
3-Nov-02 211
4-Nov-02 167
5-Nov-02 130
6-Nov-02 179
7-Nov-02 109
8-Nov-02 195
9-Nov-02 222
10-Nov-02 226
11-Nov-02 261
12-Nov-02 233
13-Nov-02 223
14-Nov-02 335
15-Nov-02 437
16-Nov-02 337
17-Nov-02 356
18-Nov-02 386
19-Nov-02 275
20-Nov-02 339
21-Nov-02 338
22-Nov-02 248
23-Nov-02 251
24-Nov-02 273
25-Nov-02 291
26-Nov-02 327
27-Nov-02 331
28-Nov-02 353
29-Nov-02 380
30-Nov-02 532
1-Dec-02 525
2-Dec-02 312
3-Dec-02 306
4-Dec-02 164
5-Dec-02 75
6-Dec-02 199
7-Dec-02 77
8-Dec-02 177
9-Dec-02 105
10-Dec-02 205
11-Dec-02 164
12-Dec-02 191
13-Dec-02 268
14-Dec-02 247
15-Dec-02 419
16-Dec-02 393
17-Dec-02 465
18-Dec-02 423
19-Dec-02 385
20-Dec-02 403
21-Dec-02 239
22-Dec-02 155
23-Dec-02 139
24-Dec-02 347
25-Dec-02 266
26-Dec-02 264
27-Dec-02 153
28-Dec-02 116
29-Dec-02 188
30-Dec-02 206
31-Dec-02 352
1-Jan-03 14
2-Jan-03 190
3-Jan-03 127
4-Jan-03 197
5-Jan-03 356
6-Jan-03 294
7-Jan-03 286
8-Jan-03 3
9-Jan-03 157
10-Jan-03 163
11-Jan-03 187
12-Jan-03 309
13-Jan-03 198
14-Jan-03 88
15-Jan-03 102
16-Jan-03 144
17-Jan-03 239
18-Jan-03 162
19-Jan-03 3
20-Jan-03 3
21-Jan-03 3
22-Jan-03 3
23-Jan-03 3
24-Jan-03 3
25-Jan-03 3
26-Jan-03 3
27-Jan-03 3
28-Jan-03 3
29-Jan-03 3
30-Jan-03 3
31-Jan-03 3
1-Feb-03 3
2-Feb-03 3
3-Feb-03 3
4-Feb-03 3
5-Feb-03 3
6-Feb-03 75
7-Feb-03 116
8-Feb-03 130
9-Feb-03 127
10-Feb-03 43
11-Feb-03 3
12-Feb-03 77
13-Feb-03 3
14-Feb-03 3
15-Feb-03 3
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 3
23-Feb-03 3
24-Feb-03 3
25-Feb-03 91
26-Feb-03 210
27-Feb-03 90
28-Feb-03 48
1-Mar-03 3
2-Mar-03 3
3-Mar-03 3
4-Mar-03 3
5-Mar-03 3
6-Mar-03 3
7-Mar-03 3
8-Mar-03 122
9-Mar-03 141
10-Mar-03 234
11-Mar-03 226
12-Mar-03 173
13-Mar-03 71
14-Mar-03 3
15-Mar-03 3
16-Mar-03 3
17-Mar-03 51
18-Mar-03 359
19-Mar-03 455
20-Mar-03 364
21-Mar-03