Site ID: 2137 Lat. 31.1845 China Hubei
River: Han Long. 112.5535
Site name: Zhongxiang Contributing area: 139326 km2 Ratio to Comparison Station: 4.93
Latest measurement: 6-Sep-11 Mean annual runoff: 171 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 207.7 mm
Latest M/C ratio: 1.30 Seven day total: 3.6 mm
Estimated current discharge: 781 m3/sec Percent of mean 7-day total: 83.5 % (today's value compared to mean for same period, 2003-2009)
5 yr recurrence flood: 1886 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 1907 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
54 2002 no data no data no data no data no data no data no data 5.6 10.9 12.1 13.7 12.0
154 2003 13.4 13.9 18.2 18.0 13.9 15.4 10.3 9.4 13.1 10.4 7.6 10.1
121 2004 10.7 14.2 18.9 17.2 12.8 14.0 7.0 4.8 4.3 5.3 5.2 6.9
190 2005 7.9 8.8 19.2 19.9 14.8 12.2 14.0 17.5 20.7 23.8 14.1 17.1
162 2006 14.6 14.7 17.6 18.0 18.2 15.3 14.9 14.5 16.9 17.6 0.0 0.0
202 2007 16.2 14.6 16.1 13.8 12.1 14.2 21.2 24.2 18.2 16.7 19.8 15.0
182 2008 13.3 12.4 18.2 16.0 14.8 12.9 12.3 15.8 16.7 16.0 16.7 17.2
186 2009 16.9 13.5 13.3 15.1 11.1 14.5 15.5 16.1 16.1 19.2 17.4 17.8
208 2010 15.9 14.1 14.2 14.7 11.5 13.6 13.3 21.4 18.8 16.8 17.9 35.5
Mean Annual Runoff (mm): 171 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-02 284
23-Jul-02 284
24-Jul-02 356
25-Jul-02 330
26-Jul-02 292
27-Jul-02 588
28-Jul-02 678
29-Jul-02 678
30-Jul-02 521
31-Jul-02 521
1-Aug-02 310
2-Aug-02 310
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 544
10-Aug-02 544
11-Aug-02 456
12-Aug-02 456
13-Aug-02 240
14-Aug-02 240
15-Aug-02 198
16-Aug-02 322
17-Aug-02 343
18-Aug-02 377
19-Aug-02 406
20-Aug-02 172
21-Aug-02 181
22-Aug-02 157
23-Aug-02 524
24-Aug-02 821
25-Aug-02 245
26-Aug-02 180
27-Aug-02 3
28-Aug-02 3
29-Aug-02 646
30-Aug-02 646
31-Aug-02 687
1-Sep-02 752
2-Sep-02 598
3-Sep-02 776
4-Sep-02 830
5-Sep-02 827
6-Sep-02 1127
7-Sep-02 697
8-Sep-02 932
9-Sep-02 757
10-Sep-02 681
11-Sep-02 734
12-Sep-02 549
13-Sep-02 660
14-Sep-02 881
15-Sep-02 881
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 549
22-Sep-02 549
23-Sep-02 631
24-Sep-02 895
25-Sep-02 626
26-Sep-02 597
27-Sep-02 562
28-Sep-02 292
29-Sep-02 514
30-Sep-02 648
1-Oct-02 648
2-Oct-02 643
3-Oct-02 832
4-Oct-02 787
5-Oct-02 920
6-Oct-02 1073
7-Oct-02 696
8-Oct-02 722
9-Oct-02 358
10-Oct-02 443
11-Oct-02 354
12-Oct-02 312
13-Oct-02 258
14-Oct-02 337
15-Oct-02 536
16-Oct-02 887
17-Oct-02 887
18-Oct-02 482
19-Oct-02 660
20-Oct-02 414
21-Oct-02 582
22-Oct-02 723
23-Oct-02 634
24-Oct-02 885
25-Oct-02 491
26-Oct-02 686
27-Oct-02 585
28-Oct-02 617
29-Oct-02 745
30-Oct-02 575
31-Oct-02 664
1-Nov-02 838
2-Nov-02 838
3-Nov-02 885
4-Nov-02 950
5-Nov-02 689
6-Nov-02 677
7-Nov-02 664
8-Nov-02 596
9-Nov-02 756
10-Nov-02 519
11-Nov-02 598
12-Nov-02 604
13-Nov-02 648
14-Nov-02 828
15-Nov-02 655
16-Nov-02 531
17-Nov-02 599
18-Nov-02 599
19-Nov-02 637
20-Nov-02 662
21-Nov-02 379
22-Nov-02 532
23-Nov-02 579
24-Nov-02 735
25-Nov-02 1097
26-Nov-02 893
27-Nov-02 1060
28-Nov-02 856
29-Nov-02 1000
30-Nov-02 1146
1-Dec-02 1097
2-Dec-02 1362
3-Dec-02 1172
4-Dec-02 1172
5-Dec-02 555
6-Dec-02 427
7-Dec-02 200
8-Dec-02 403
9-Dec-02 515
10-Dec-02 493
11-Dec-02 552
12-Dec-02 513
13-Dec-02 783
14-Dec-02 848
15-Dec-02 860
16-Dec-02 852
17-Dec-02 397
18-Dec-02 445
19-Dec-02 469
20-Dec-02 469
21-Dec-02 768
22-Dec-02 801
23-Dec-02 527
24-Dec-02 562
25-Dec-02 542
26-Dec-02 515
27-Dec-02 703
28-Dec-02 405
29-Dec-02 447
30-Dec-02 256
31-Dec-02 293
1-Jan-03 369
2-Jan-03 300
3-Jan-03 362
4-Jan-03 326
5-Jan-03 326
6-Jan-03 363
7-Jan-03 491
8-Jan-03 527
9-Jan-03 651
10-Jan-03 741
11-Jan-03 825
12-Jan-03 1034
13-Jan-03 732
14-Jan-03 732
15-Jan-03 543
16-Jan-03 743
17-Jan-03 890
18-Jan-03 977
19-Jan-03 1167
20-Jan-03 1139
21-Jan-03 1139
22-Jan-03 659
23-Jan-03 735
24-Jan-03 567
25-Jan-03 615
26-Jan-03 746
27-Jan-03 790
28-Jan-03 896
29-Jan-03 822
30-Jan-03 798
31-Jan-03 538
1-Feb-03 608
2-Feb-03 597
3-Feb-03 678
4-Feb-03 900
5-Feb-03 1076
6-Feb-03 1076
7-Feb-03 1154
8-Feb-03 1101
9-Feb-03 780
10-Feb-03 767
11-Feb-03 767
12-Feb-03 663
13-Feb-03 737
14-Feb-03 599
15-Feb-03 686
16-Feb-03 610
17-Feb-03 759
18-Feb-03 860
19-Feb-03 958
20-Feb-03 1206
21-Feb-03 665
22-Feb-03 665
23-Feb-03 422
24-Feb-03 710
25-Feb-03 873
26-Feb-03 836
27-Feb-03 889
28-Feb-03 713
1-Mar-03 743
2-Mar-03 830
3-Mar-03 1070
4-Mar-03 877