Site ID: 46 Lat. 28.9243 China Hunan
River: Yuan Long. 112.4863
Site name: Yuanjiang Contributing area: 99821 km2 Ratio to Comparison Station: 0.19
Latest measurement: 24-Jul-10 Mean annual runoff: 199 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 75.5 mm
Latest M/C ratio: 1.46 Seven day total: 5.5 mm
Estimated current discharge: 1467 m3/sec Percent of mean 7-day total: 215.1 % (today's value compared to mean for same period, 2003-2009)
Ice-cover determination: 5 yr recurrence flood: 3161 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 3025 m3/sec (from Gumbel Extreme Value analysis)
Comparison Station Information:  Pakse (2469260)           Contributing Area:   sq mi 536010 sq km
(Data from this gaging station are used for the calibration to discharge, with an adjustment for different contributing areas)
Notes: Calibration to nearby ground station 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
115 2002 no data no data no data no data no data no data no data 42.2 37.2 20.9 9.1 5.5
261 2003 12.5 6.8 9.0 4.4 16.6 31.3 38.5 31.0 46.1 28.3 16.9 19.4
246 2004 18.4 21.0 15.9 5.3 18.4 31.6 27.7 28.7 33.7 18.4 12.9 14.6
226 2005 12.9 10.6 13.8 1.2 16.0 27.0 19.2 42.2 41.5 21.4 10.2 9.9
119 2006 5.1 4.9 5.3 1.3 12.6 20.6 13.8 18.2 21.1 16.5 0.0 0.0
201 2007 5.3 11.8 6.6 1.4 5.7 16.5 24.0 52.0 32.5 21.7 13.7 9.8
178 2008 11.3 9.5 9.7 3.9 6.3 8.6 12.4 36.8 37.5 19.2 14.1 8.3
160 2009 9.1 7.6 5.3 3.7 8.1 10.8 17.3 30.9 25.5 18.8 12.1 10.6
75 2010 9.6 8.9 8.3 8.3 7.6 15.6 17.2 0.0 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 199 Standard Deviation: 6.4
Trend in Annual Runoff (slope):  5.9
Discharge is estimated via a rating equation directly from the remote sensing data (M/C ratio) shown below.
Explanation:   Green line records upwelling microwave emission from within 5 km radius of a calbration land target; blue line is emission from within 5 km radious of the measurement target centered over the river.
Brown line is their ratio (M/C; 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. For calibration status, see "notes" entry, above.
GoogleEarth View of Measurement Site
Return
Estimated
Disharge
Data
Date m3/sec
22-Jul-02 3
23-Jul-02 3
24-Jul-02 3
25-Jul-02 3
26-Jul-02 3
27-Jul-02 3
28-Jul-02 3
29-Jul-02 3
30-Jul-02 72
31-Jul-02 72
1-Aug-02 368
2-Aug-02 368
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 1554
10-Aug-02 1554
11-Aug-02 1097
12-Aug-02 1097
13-Aug-02 333
14-Aug-02 333
15-Aug-02 25
16-Aug-02 251
17-Aug-02 585
18-Aug-02 1357
19-Aug-02 1830
20-Aug-02 1827
21-Aug-02 2249
22-Aug-02 1387
23-Aug-02 2992
24-Aug-02 3481
25-Aug-02 3734
26-Aug-02 4288
27-Aug-02 3223
28-Aug-02 4059
29-Aug-02 3903
30-Aug-02 3903
31-Aug-02 2992
1-Sep-02 2366
2-Sep-02 1590
3-Sep-02 1663
4-Sep-02 1573
5-Sep-02 2631
6-Sep-02 3213
7-Sep-02 3684
8-Sep-02 3263
9-Sep-02 2238
10-Sep-02 2100
11-Sep-02 1884
12-Sep-02 1653
13-Sep-02 1741
14-Sep-02 1778
15-Sep-02 1778
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 885
22-Sep-02 885
23-Sep-02 1177
24-Sep-02 1237
25-Sep-02 1106
26-Sep-02 1065
27-Sep-02 946
28-Sep-02 781
29-Sep-02 879
30-Sep-02 807
1-Oct-02 807
2-Oct-02 907
3-Oct-02 1051
4-Oct-02 1207
5-Oct-02 1084
6-Oct-02 1108
7-Oct-02 829
8-Oct-02 635
9-Oct-02 673
10-Oct-02 689
11-Oct-02 765
12-Oct-02 796
13-Oct-02 806
14-Oct-02 849
15-Oct-02 869
16-Oct-02 902
17-Oct-02 902
18-Oct-02 933
19-Oct-02 977
20-Oct-02 454
21-Oct-02 521
22-Oct-02 406
23-Oct-02 206
24-Oct-02 540
25-Oct-02 756
26-Oct-02 718
27-Oct-02 873
28-Oct-02 828
29-Oct-02 718
30-Oct-02 688
31-Oct-02 616
1-Nov-02 353
2-Nov-02 353
3-Nov-02 452
4-Nov-02 762
5-Nov-02 920
6-Nov-02 752
7-Nov-02 755
8-Nov-02 558
9-Nov-02 491
10-Nov-02 477
11-Nov-02 524
12-Nov-02 644
13-Nov-02 490
14-Nov-02 592
15-Nov-02 355
16-Nov-02 3
17-Nov-02 3
18-Nov-02 3
19-Nov-02 13
20-Nov-02 3
21-Nov-02 3
22-Nov-02 84
23-Nov-02 108
24-Nov-02 200
25-Nov-02 338
26-Nov-02 188
27-Nov-02 188
28-Nov-02 303
29-Nov-02 307
30-Nov-02 281
1-Dec-02 492
2-Dec-02 579
3-Dec-02 204
4-Dec-02 204
5-Dec-02 3
6-Dec-02 3
7-Dec-02 3
8-Dec-02 3
9-Dec-02 3
10-Dec-02 78
11-Dec-02 196
12-Dec-02 353
13-Dec-02 378
14-Dec-02 248
15-Dec-02 238
16-Dec-02 179
17-Dec-02 3
18-Dec-02 3
19-Dec-02 3
20-Dec-02 3
21-Dec-02 143
22-Dec-02 138
23-Dec-02 213
24-Dec-02 199
25-Dec-02 212
26-Dec-02 398
27-Dec-02 423
28-Dec-02 427
29-Dec-02 386
30-Dec-02 281
31-Dec-02 381
1-Jan-03 458
2-Jan-03 757
3-Jan-03 958
4-Jan-03 773
5-Jan-03 773
6-Jan-03 460
7-Jan-03 465
8-Jan-03 295
9-Jan-03 268
10-Jan-03 169
11-Jan-03 55
12-Jan-03 143
13-Jan-03 241
14-Jan-03 241
15-Jan-03 403
16-Jan-03 390
17-Jan-03 391
18-Jan-03 529
19-Jan-03 583
20-Jan-03 430
21-Jan-03 430
22-Jan-03 545
23-Jan-03 759
24-Jan-03 1157
25-Jan-03 998
26-Jan-03 960
27-Jan-03 505
28-Jan-03 222
29-Jan-03 41
30-Jan-03 45
31-Jan-03 3
1-Feb-03 3
2-Feb-03 3
3-Feb-03 36
4-Feb-03 101
5-Feb-03 220
6-Feb-03 220
7-Feb-03 219
8-Feb-03 387
9-Feb-03 204
10-Feb-03 166
11-Feb-03 166
12-Feb-03 155
13-Feb-03 326
14-Feb-03 72
15-Feb-03 3
16-Feb-03 3
17-Feb-03 104
18-Feb-03 260
19-Feb-03 601
20-Feb-03 721
21-Feb-03 607
22-Feb-03 607
23-Feb-03 202
24-Feb-03 463
25-Feb-03 501
26-Feb-03 468
27-Feb-03 731
28-Feb-03 333
1-Mar-03 93
2-Mar-03 45
3-Mar-03 440
4-Mar-03 442
5-Mar-03 291
6-Mar-03 321
7-Mar-03 3
8-Mar-03 3