Site ID: 134 Lat. 29.0629 China Hunan
River: Yuan Long. 112.2711
Site name: Yuanjiang Contributing area: 97895 km2 Ratio to Comparison Station: 0.18
Latest measurement: 29-Jul-10 Mean annual runoff: 179 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 95.8 mm
Latest M/C ratio: 1.41 Seven day total: 6.4 mm
Estimated current discharge: 1243 m3/sec Percent of mean 7-day total: 188.4 % (today's value compared to mean for same period, 2003-2009)
Ice-cover determination: 5 yr recurrence flood: 2414 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 2335 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
58 2002 no data no data no data no data no data no data no data 16.4 14.9 16.0 5.8 4.8
161 2003 5.5 5.0 8.5 3.8 13.8 25.3 11.8 16.9 24.3 17.5 12.9 15.8
146 2004 14.6 13.8 10.7 4.9 11.2 21.9 11.4 10.9 15.4 12.2 8.4 10.2
195 2005 9.3 5.2 11.5 2.3 13.7 20.0 9.7 34.1 38.2 22.6 14.5 13.7
132 2006 7.4 9.7 8.4 3.7 12.2 19.0 14.1 19.5 19.6 18.9 0.0 0.0
218 2007 8.9 15.2 10.8 7.6 7.1 14.9 23.1 45.6 31.5 22.1 18.0 12.9
211 2008 12.6 12.0 12.4 10.0 7.1 9.4 15.0 40.0 38.5 21.2 21.6 11.3
193 2009 11.9 9.3 9.1 7.9 9.3 13.8 16.8 32.9 28.5 22.4 17.3 14.3
96 2010 14.7 11.5 13.2 8.2 8.0 15.7 23.3 1.2 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 179 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 3
31-Jul-02 3
1-Aug-02 3
2-Aug-02 3
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 876
10-Aug-02 876
11-Aug-02 629
12-Aug-02 629
13-Aug-02 30
14-Aug-02 30
15-Aug-02 3
16-Aug-02 50
17-Aug-02 300
18-Aug-02 560
19-Aug-02 858
20-Aug-02 824
21-Aug-02 1017
22-Aug-02 977
23-Aug-02 1122
24-Aug-02 1193
25-Aug-02 1411
26-Aug-02 1431
27-Aug-02 1126
28-Aug-02 1286
29-Aug-02 1050
30-Aug-02 1050
31-Aug-02 1215
1-Sep-02 1275
2-Sep-02 1126
3-Sep-02 1030
4-Sep-02 1072
5-Sep-02 810
6-Sep-02 673
7-Sep-02 776
8-Sep-02 718
9-Sep-02 563
10-Sep-02 599
11-Sep-02 486
12-Sep-02 366
13-Sep-02 479
14-Sep-02 242
15-Sep-02 242
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 388
22-Sep-02 388
23-Sep-02 646
24-Sep-02 580
25-Sep-02 643
26-Sep-02 727
27-Sep-02 676
28-Sep-02 770
29-Sep-02 865
30-Sep-02 716
1-Oct-02 716
2-Oct-02 613
3-Oct-02 625
4-Oct-02 577
5-Oct-02 499
6-Oct-02 484
7-Oct-02 377
8-Oct-02 304
9-Oct-02 399
10-Oct-02 505
11-Oct-02 568
12-Oct-02 602
13-Oct-02 652
14-Oct-02 669
15-Oct-02 746
16-Oct-02 797
17-Oct-02 797
18-Oct-02 769
19-Oct-02 739
20-Oct-02 314
21-Oct-02 435
22-Oct-02 346
23-Oct-02 345
24-Oct-02 720
25-Oct-02 687
26-Oct-02 692
27-Oct-02 734
28-Oct-02 714
29-Oct-02 709
30-Oct-02 534
31-Oct-02 420
1-Nov-02 152
2-Nov-02 152
3-Nov-02 242
4-Nov-02 219
5-Nov-02 227
6-Nov-02 259
7-Nov-02 221
8-Nov-02 289
9-Nov-02 372
10-Nov-02 313
11-Nov-02 272
12-Nov-02 240
13-Nov-02 114
14-Nov-02 67
15-Nov-02 3
16-Nov-02 3
17-Nov-02 184
18-Nov-02 184
19-Nov-02 407
20-Nov-02 280
21-Nov-02 124
22-Nov-02 187
23-Nov-02 122
24-Nov-02 172
25-Nov-02 268
26-Nov-02 310
27-Nov-02 239
28-Nov-02 296
29-Nov-02 340
30-Nov-02 298
1-Dec-02 404
2-Dec-02 441
3-Dec-02 152
4-Dec-02 152
5-Dec-02 3
6-Dec-02 78
7-Dec-02 75
8-Dec-02 81
9-Dec-02 138
10-Dec-02 81
11-Dec-02 154
12-Dec-02 128
13-Dec-02 147
14-Dec-02 157
15-Dec-02 208
16-Dec-02 267
17-Dec-02 83
18-Dec-02 3
19-Dec-02 3
20-Dec-02 3
21-Dec-02 399
22-Dec-02 253
23-Dec-02 151
24-Dec-02 153
25-Dec-02 62
26-Dec-02 201
27-Dec-02 277
28-Dec-02 309
29-Dec-02 364
30-Dec-02 258
31-Dec-02 250
1-Jan-03 260
2-Jan-03 270
3-Jan-03 364
4-Jan-03 395
5-Jan-03 395
6-Jan-03 224
7-Jan-03 242
8-Jan-03 94
9-Jan-03 48
10-Jan-03 11
11-Jan-03 3
12-Jan-03 3
13-Jan-03 114
14-Jan-03 114
15-Jan-03 160
16-Jan-03 171
17-Jan-03 160
18-Jan-03 192
19-Jan-03 224
20-Jan-03 217
21-Jan-03 217
22-Jan-03 190
23-Jan-03 204
24-Jan-03 290
25-Jan-03 199
26-Jan-03 196
27-Jan-03 233
28-Jan-03 141
29-Jan-03 343
30-Jan-03 298
31-Jan-03 250
1-Feb-03 169
2-Feb-03 99
3-Feb-03 87
4-Feb-03 53
5-Feb-03 211
6-Feb-03 211
7-Feb-03 276
8-Feb-03 312
9-Feb-03 246
10-Feb-03 152
11-Feb-03 152
12-Feb-03 154
13-Feb-03 162
14-Feb-03 312
15-Feb-03 35
16-Feb-03 177
17-Feb-03 239
18-Feb-03 234
19-Feb-03 453
20-Feb-03 298
21-Feb-03 133
22-Feb-03 133
23-Feb-03 3
24-Feb-03 234
25-Feb-03 293
26-Feb-03 254
27-Feb-03 468
28-Feb-03 106
1-Mar-03 24
2-Mar-03 156
3-Mar-03 314
4-Mar-03 452
5-Mar-03 374
6-Mar-03 375
7-Mar-03 233
8-Mar-03 106