Site ID: 2131 Lat. 30.8542 China Sichuan
River: Ou Long. 107.0087
Site name: Lang-yeh Contributing area: 34888 km2 Ratio to Comparison Station: 1.24
Latest measurement: 6-Sep-11 Mean annual runoff: 130 mm (2003-2009)
Hydrologic status: 1 Low flow or ice Total runoff this year (2010): 210.7 mm
Latest M/C ratio: 1.10 Seven day total: 3.5 mm
Estimated current discharge: 3 m3/sec Percent of mean 7-day total: 89.2 % (today's value compared to mean for same period, 2003-2009)
5 yr recurrence flood: 866 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 837 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
27 2002 no data no data no data no data no data no data no data 9.2 13.0 0.8 3.0 0.7
45 2003 4.6 1.4 2.0 13.1 6.3 2.1 7.6 4.1 3.1 0.3 0.2 0.3
13 2004 0.3 0.2 0.3 2.8 1.2 0.5 1.7 0.7 4.4 0.3 0.5 0.3
145 2005 0.3 0.2 3.1 37.6 33.9 3.5 10.1 9.8 19.6 18.2 6.8 1.4
149 2006 16.1 14.9 17.1 24.9 29.9 5.4 9.5 13.0 8.5 9.3 0.0 0.0
150 2007 4.7 10.1 9.9 36.0 26.1 2.9 21.5 14.8 3.1 3.2 6.3 11.2
191 2008 8.0 10.8 20.9 15.3 24.3 5.1 14.0 9.3 22.8 21.8 17.4 21.7
216 2009 27.3 21.9 20.1 32.4 21.2 5.9 7.8 16.7 16.4 13.2 12.7 20.1
211 2010 18.4 14.9 21.7 26.5 26.0 6.1 11.9 13.5 17.8 9.0 14.3 30.8
Mean Annual Runoff (mm): 130 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-02 209
23-Jul-02 209
24-Jul-02 188
25-Jul-02 303
26-Jul-02 220
27-Jul-02 213
28-Jul-02 69
29-Jul-02 125
30-Jul-02 134
31-Jul-02 102
1-Aug-02 304
2-Aug-02
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 3
10-Aug-02 3
11-Aug-02 3
12-Aug-02 3
13-Aug-02 3
14-Aug-02 3
15-Aug-02 3
16-Aug-02 3
17-Aug-02 3
18-Aug-02 259
19-Aug-02 329
20-Aug-02 438
21-Aug-02 417
22-Aug-02 328
23-Aug-02 3
24-Aug-02 3
25-Aug-02 3
26-Aug-02 3
27-Aug-02 358
28-Aug-02 347
29-Aug-02 244
30-Aug-02 331
31-Aug-02 308
1-Sep-02 480
2-Sep-02 732
3-Sep-02 723
4-Sep-02 481
5-Sep-02 346
6-Sep-02 332
7-Sep-02 174
8-Sep-02 194
9-Sep-02 104
10-Sep-02 118
11-Sep-02 206
12-Sep-02 237
13-Sep-02 237
14-Sep-02 124
15-Sep-02 124
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 3
22-Sep-02 3
23-Sep-02 3
24-Sep-02 3
25-Sep-02 3
26-Sep-02 77
27-Sep-02 97
28-Sep-02 179
29-Sep-02 174
30-Sep-02 94
1-Oct-02 47
2-Oct-02 5
3-Oct-02 3
4-Oct-02 3
5-Oct-02 3
6-Oct-02 3
7-Oct-02 3
8-Oct-02 3
9-Oct-02 3
10-Oct-02 3
11-Oct-02 3
12-Oct-02 3
13-Oct-02 54
14-Oct-02 24
15-Oct-02 3
16-Oct-02 3
17-Oct-02 3
18-Oct-02 3
19-Oct-02 3
20-Oct-02 3
21-Oct-02 3
22-Oct-02 3
23-Oct-02 16
24-Oct-02 33
25-Oct-02 28
26-Oct-02 12
27-Oct-02 3
28-Oct-02 3
29-Oct-02 3
30-Oct-02 28
31-Oct-02 3
1-Nov-02 3
2-Nov-02 59
3-Nov-02 3
4-Nov-02 82
5-Nov-02 317
6-Nov-02 82
7-Nov-02 136
8-Nov-02 3
9-Nov-02 3
10-Nov-02 3
11-Nov-02 3
12-Nov-02 210
13-Nov-02 160
14-Nov-02 75
15-Nov-02 3
16-Nov-02 31
17-Nov-02 3
18-Nov-02 3
19-Nov-02 3
20-Nov-02 3
21-Nov-02 3
22-Nov-02 3
23-Nov-02 3
24-Nov-02 3
25-Nov-02 3
26-Nov-02 3
27-Nov-02 3
28-Nov-02 3
29-Nov-02 3
30-Nov-02 3
1-Dec-02 3
2-Dec-02 3
3-Dec-02 3
4-Dec-02 3
5-Dec-02 21
6-Dec-02 3
7-Dec-02 3
8-Dec-02 3
9-Dec-02 3
10-Dec-02 31
11-Dec-02 3
12-Dec-02 3
13-Dec-02 3
14-Dec-02 3
15-Dec-02 87
16-Dec-02 57
17-Dec-02 3
18-Dec-02 3
19-Dec-02 3
20-Dec-02 3
21-Dec-02 3
22-Dec-02 3
23-Dec-02 3
24-Dec-02 3
25-Dec-02 3
26-Dec-02 3
27-Dec-02 3
28-Dec-02 3
29-Dec-02 3
30-Dec-02 3
31-Dec-02 3
1-Jan-03 3
2-Jan-03 3
3-Jan-03 3
4-Jan-03 3
5-Jan-03 3
6-Jan-03 3
7-Jan-03 3
8-Jan-03 80
9-Jan-03 70
10-Jan-03 36
11-Jan-03 3
12-Jan-03 3
13-Jan-03 3
14-Jan-03 3
15-Jan-03 3
16-Jan-03 3
17-Jan-03 3
18-Jan-03 3
19-Jan-03 3
20-Jan-03 3
21-Jan-03 24
22-Jan-03 151
23-Jan-03 274
24-Jan-03 662
25-Jan-03 202
26-Jan-03 147
27-Jan-03 23
28-Jan-03 12
29-Jan-03 3
30-Jan-03 36
31-Jan-03 65
1-Feb-03 89
2-Feb-03 103
3-Feb-03 3
4-Feb-03 3
5-Feb-03 3
6-Feb-03 3
7-Feb-03 3
8-Feb-03 3
9-Feb-03 3
10-Feb-03 3
11-Feb-03 3
12-Feb-03 3
13-Feb-03 3
14-Feb-03 3
15-Feb-03 3
16-Feb-03 3
17-Feb-03 3
18-Feb-03 153
19-Feb-03 22
20-Feb-03 3
21-Feb-03 3
22-Feb-03 3
23-Feb-03 3
24-Feb-03 3
25-Feb-03 104
26-Feb-03 3
27-Feb-03 3
28-Feb-03 3
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 3
9-Mar-03 42
10-Mar-03 122
11-Mar-03 122
12-Mar-03 49
13-Mar-03 94
14-Mar-03 3
15-Mar-03 3
16-Mar-03 3
17-Mar-03 3
18-Mar-03 3
19-Mar-03 3
20-Mar-03 3
21-Mar-03 116
22-Mar-03 116
23-Mar-03 3
24-Mar-03 3
25-Mar-03 70
26-Mar-03 3
27-Mar-03 3
28-Mar-03 3
29-Mar-03 3
30-Mar-03 3
31-Mar-03 3
1-Apr-03 3
2-Apr-03 3
3-Apr-03 30
4-Apr-03 66
5-Apr-03 157
6-Apr-03 253
7-Apr-03 420
8-Apr-03 249
9-Apr-03 179
10-Apr-03 50
11-Apr-03 141
12-Apr-03 129
13-Apr-03 92
14-Apr-03 173
15-Apr-03 61
16-Apr-03 203