Site ID: 2286 Lat. 33.2646 Japan 0
River: Chikugo Long. 130.4333
Site name: 0 Contributing area: 2486 km2 Ratio to Comparison Station: 0.09
Latest measurement: 13-Jul-10 Mean annual runoff: 5129 mm (2003-2009)
Hydrologic status: 1 Low flow or ice Total runoff this year (2010): 2954.3 mm
Latest M/C ratio: 1.10 Seven day total: 220.2 mm
Estimated current discharge: 3 m3/sec Percent of mean 7-day total: 105.0 % (today's value compared to mean for same period, 2003-2009)
5 yr recurrence flood: 2569 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 2527 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
2315 2002 no data no data no data no data no data no data no data 411.3 424.5 394.3 541.8 542.7
5390 2003 310.9 260.3 270.1 324.0 266.3 667.8 1100.0 445.0 453.1 604.0 352.1 336.9
5807 2004 357.5 276.6 332.1 252.8 264.6 805.3 1203.5 470.3 465.2 465.7 500.2 413.3
5150 2005 334.7 147.4 300.9 304.7 238.9 1158.7 888.4 345.9 339.6 380.7 310.2 399.7
4228 2006 293.6 308.7 474.4 334.9 169.8 704.2 847.8 241.5 353.2 499.9 0.0 0.0
5013 2007 306.9 312.2 384.8 283.3 356.6 790.7 795.8 293.7 363.1 409.4 439.8 277.0
4974 2008 418.7 254.9 298.8 388.4 359.8 663.9 957.8 169.1 252.3 378.3 400.8 430.8
5340 2009 424.4 404.8 338.0 250.0 324.0 832.9 894.0 313.0 274.2 396.8 493.5 394.1
2954 2010 386.0 477.7 377.2 260.5 360.7 726.3 365.9 0.0 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 5129 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-02 723
23-Jul-02 723
24-Jul-02 712
25-Jul-02 615
26-Jul-02 456
27-Jul-02 486
28-Jul-02 508
29-Jul-02 528
30-Jul-02 595
31-Jul-02 572
1-Aug-02 580
2-Aug-02
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 481
10-Aug-02 193
11-Aug-02 353
12-Aug-02 333
13-Aug-02 382
14-Aug-02 504
15-Aug-02 416
16-Aug-02 595
17-Aug-02 441
18-Aug-02 734
19-Aug-02 607
20-Aug-02 629
21-Aug-02 520
22-Aug-02 432
23-Aug-02 494
24-Aug-02 394
25-Aug-02 610
26-Aug-02 483
27-Aug-02 456
28-Aug-02 480
29-Aug-02 421
30-Aug-02 614
31-Aug-02 684
1-Sep-02 724
2-Sep-02 724
3-Sep-02 650
4-Sep-02 637
5-Sep-02 649
6-Sep-02 594
7-Sep-02 573
8-Sep-02 480
9-Sep-02 387
10-Sep-02 433
11-Sep-02 350
12-Sep-02 465
13-Sep-02 465
14-Sep-02 433
15-Sep-02 726
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 211
22-Sep-02 236
23-Sep-02 236
24-Sep-02 329
25-Sep-02 380
26-Sep-02 449
27-Sep-02 452
28-Sep-02 499
29-Sep-02 515
30-Sep-02 616
1-Oct-02 615
2-Oct-02 608
3-Oct-02 497
4-Oct-02 408
5-Oct-02 538
6-Oct-02 361
7-Oct-02 275
8-Oct-02 184
9-Oct-02 35
10-Oct-02 205
11-Oct-02 250
12-Oct-02 637
13-Oct-02 573
14-Oct-02 636
15-Oct-02 678
16-Oct-02 510
17-Oct-02 578
18-Oct-02 510
19-Oct-02 128
20-Oct-02 69
21-Oct-02 103
22-Oct-02 337
23-Oct-02 577
24-Oct-02 473
25-Oct-02 472
26-Oct-02 256
27-Oct-02 184
28-Oct-02 253
29-Oct-02 122
30-Oct-02 115
31-Oct-02 159
1-Nov-02 243
2-Nov-02 416
3-Nov-02 537
4-Nov-02 666
5-Nov-02 413
6-Nov-02 400
7-Nov-02 381
8-Nov-02 550
9-Nov-02 540
10-Nov-02 561
11-Nov-02 611
12-Nov-02 504
13-Nov-02 639
14-Nov-02 565
15-Nov-02 586
16-Nov-02 565
17-Nov-02 492
18-Nov-02 608
19-Nov-02 636
20-Nov-02 564
21-Nov-02 564
22-Nov-02 515
23-Nov-02 491
24-Nov-02 523
25-Nov-02 468
26-Nov-02 405
27-Nov-02 465
28-Nov-02 466
29-Nov-02 560
30-Nov-02 654
1-Dec-02 594
2-Dec-02 456
3-Dec-02 421
4-Dec-02 220
5-Dec-02 128
6-Dec-02 195
7-Dec-02 277
8-Dec-02 570
9-Dec-02 655
10-Dec-02 645
11-Dec-02 561
12-Dec-02 512
13-Dec-02 430
14-Dec-02 439
15-Dec-02 521
16-Dec-02 409
17-Dec-02 400
18-Dec-02 505
19-Dec-02 568
20-Dec-02 582
21-Dec-02 602
22-Dec-02 546
23-Dec-02 364
24-Dec-02 839
25-Dec-02 756
26-Dec-02 682
27-Dec-02 654
28-Dec-02 545
29-Dec-02 567
30-Dec-02 609
31-Dec-02 367
1-Jan-03 367
2-Jan-03 246
3-Jan-03 244
4-Jan-03 220
5-Jan-03 188
6-Jan-03 126
7-Jan-03 74
8-Jan-03 89
9-Jan-03 97
10-Jan-03 188
11-Jan-03 245
12-Jan-03 240
13-Jan-03 286
14-Jan-03 334
15-Jan-03 376
16-Jan-03 419
17-Jan-03 382
18-Jan-03 300
19-Jan-03 183
20-Jan-03 104
21-Jan-03 180
22-Jan-03 216
23-Jan-03 362
24-Jan-03 404
25-Jan-03 543
26-Jan-03 406
27-Jan-03 463
28-Jan-03 451
29-Jan-03 390
30-Jan-03 449
31-Jan-03 373
1-Feb-03 232
2-Feb-03 265
3-Feb-03 320
4-Feb-03 256
5-Feb-03 358
6-Feb-03 397
7-Feb-03 369
8-Feb-03 519
9-Feb-03 484
10-Feb-03 450
11-Feb-03 283
12-Feb-03 307
13-Feb-03 269
14-Feb-03 242
15-Feb-03 266
16-Feb-03 111
17-Feb-03 104
18-Feb-03 125
19-Feb-03 346
20-Feb-03 314
21-Feb-03 179
22-Feb-03 105
23-Feb-03 3
24-Feb-03 40
25-Feb-03 256
26-Feb-03 388
27-Feb-03 350
28-Feb-03 150
1-Mar-03 90
2-Mar-03 79
3-Mar-03 104
4-Mar-03 133
5-Mar-03 592
6-Mar-03 475
7-Mar-03 513
8-Mar-03 360
9-Mar-03 104
10-Mar-03 138
11-Mar-03 138