Site ID: 44 Lat. 32.4918 China Henan
River: Huai Long. 115.8188
Site name: Huanggang Contributing area: 53703 km2 Ratio to Comparison Station: 0.10
Latest measurement: 24-Jul-10 Mean annual runoff: 192 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 119.9 mm
Latest M/C ratio: 1.11 Seven day total: 2.6 mm
Estimated current discharge: 16 m3/sec Percent of mean 7-day total: 47.5 % (today's value compared to mean for same period, 2003-2009)
Ice-cover determination: 5 yr recurrence flood: 3930 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 3817 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
20 2002 no data no data no data no data no data no data no data 8.7 0.7 5.9 1.3 3.2
340 2003 3.6 9.1 17.4 11.6 39.9 65.1 57.8 45.2 28.0 35.4 15.6 11.3
134 2004 9.5 1.1 5.5 8.7 22.7 76.8 0.9 5.1 0.4 2.8 0.8 0.2
191 2005 0.2 0.6 2.9 7.5 34.5 67.4 14.8 24.3 23.5 11.8 1.6 2.3
142 2006 3.1 13.6 15.9 23.9 33.4 43.4 2.6 0.2 0.5 5.3 0.0 0.0
286 2007 0.8 1.9 28.4 24.3 37.9 33.8 55.1 79.2 9.0 6.8 7.7 1.7
135 2008 0.5 6.1 7.5 20.0 34.1 35.3 2.8 10.2 6.2 5.1 5.1 2.0
114 2009 0.6 3.1 11.5 13.9 22.7 39.0 0.2 0.2 0.4 7.1 5.6 10.1
120 2010 1.0 5.3 22.4 20.8 18.8 41.2 10.3 0.0 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 192 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 6
28-Jul-02 463
29-Jul-02 983
30-Jul-02 1586
31-Jul-02 1586
1-Aug-02 1730
2-Aug-02 1730
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 548
10-Aug-02 245
11-Aug-02 297
12-Aug-02 297
13-Aug-02 123
14-Aug-02 195
15-Aug-02 3
16-Aug-02 98
17-Aug-02 64
18-Aug-02 3
19-Aug-02 3
20-Aug-02 3
21-Aug-02 3
22-Aug-02 3
23-Aug-02 3
24-Aug-02 3
25-Aug-02 20
26-Aug-02 3
27-Aug-02 3
28-Aug-02 25
29-Aug-02 3
30-Aug-02 3
31-Aug-02 3
1-Sep-02 3
2-Sep-02 3
3-Sep-02 3
4-Sep-02 3
5-Sep-02 3
6-Sep-02 49
7-Sep-02 26
8-Sep-02 108
9-Sep-02 78
10-Sep-02 38
11-Sep-02 3
12-Sep-02 3
13-Sep-02 3
14-Sep-02 3
15-Sep-02 3
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 3
27-Sep-02 22
28-Sep-02 3
29-Sep-02 14
30-Sep-02 20
1-Oct-02 3
2-Oct-02 67
3-Oct-02 177
4-Oct-02 180
5-Oct-02 165
6-Oct-02 53
7-Oct-02 58
8-Oct-02 31
9-Oct-02 7
10-Oct-02 123
11-Oct-02 66
12-Oct-02 93
13-Oct-02 127
14-Oct-02 68
15-Oct-02 89
16-Oct-02 3
17-Oct-02 3
18-Oct-02 3
19-Oct-02 3
20-Oct-02 3
21-Oct-02 34
22-Oct-02 169
23-Oct-02 93
24-Oct-02 187
25-Oct-02 403
26-Oct-02 378
27-Oct-02 345
28-Oct-02 309
29-Oct-02 184
30-Oct-02 157
31-Oct-02 102
1-Nov-02 115
2-Nov-02 178
3-Nov-02 158
4-Nov-02 13
5-Nov-02 17
6-Nov-02 34
7-Nov-02 3
8-Nov-02 44
9-Nov-02 3
10-Nov-02 3
11-Nov-02 3
12-Nov-02 3
13-Nov-02 3
14-Nov-02 3
15-Nov-02 3
16-Nov-02 3
17-Nov-02 3
18-Nov-02 3
19-Nov-02 23
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 89
29-Nov-02 54
30-Nov-02 12
1-Dec-02 3
2-Dec-02 3
3-Dec-02 3
4-Dec-02 3
5-Dec-02 3
6-Dec-02 3
7-Dec-02 3
8-Dec-02 3
9-Dec-02 3
10-Dec-02 3
11-Dec-02 3
12-Dec-02 48
13-Dec-02 73
14-Dec-02 87
15-Dec-02 36
16-Dec-02 3
17-Dec-02 3
18-Dec-02 3
19-Dec-02 3
20-Dec-02 46
21-Dec-02 84
22-Dec-02 72
23-Dec-02 52
24-Dec-02 142
25-Dec-02 199
26-Dec-02 167
27-Dec-02 204
28-Dec-02 194
29-Dec-02 265
30-Dec-02 150
31-Dec-02 108
1-Jan-03 32
2-Jan-03 70
3-Jan-03 87
4-Jan-03 81
5-Jan-03 81
6-Jan-03 11
7-Jan-03 3
8-Jan-03 3
9-Jan-03 3
10-Jan-03 3
11-Jan-03 17
12-Jan-03 88
13-Jan-03 124
14-Jan-03 133
15-Jan-03 158
16-Jan-03 110
17-Jan-03 104
18-Jan-03 136
19-Jan-03 142
20-Jan-03 176
21-Jan-03 173
22-Jan-03 3
23-Jan-03 3
24-Jan-03 3
25-Jan-03 3
26-Jan-03 3
27-Jan-03 111
28-Jan-03 125
29-Jan-03 65
30-Jan-03 152
31-Jan-03 3
1-Feb-03 3
2-Feb-03 3
3-Feb-03 3
4-Feb-03 53
5-Feb-03 78
6-Feb-03 106
7-Feb-03 29
8-Feb-03 155
9-Feb-03 125
10-Feb-03 119
11-Feb-03 87
12-Feb-03 62
13-Feb-03 9
14-Feb-03 129
15-Feb-03 206
16-Feb-03 468
17-Feb-03 450
18-Feb-03 466
19-Feb-03 435
20-Feb-03 446
21-Feb-03 480
22-Feb-03 424
23-Feb-03 292
24-Feb-03 99
25-Feb-03 89
26-Feb-03 263
27-Feb-03 301
28-Feb-03 279
1-Mar-03 263
2-Mar-03 162
3-Mar-03 123
4-Mar-03 399
5-Mar-03 265
6-Mar-03 41
7-Mar-03 41
8-Mar-03 3
9-Mar-03 56
10-Mar-03 417
11-Mar-03 452
12-Mar-03 393
13-Mar-03 333
14-Mar-03 181
15-Mar-03 209
16-Mar-03 213
17-Mar-03 199
18-Mar-03 457
19-Mar-03 593
20-Mar-03 692
21-Mar-03 842
22-Mar-03 682
23-Mar-03 590
24-Mar-03 526
25-Mar-03 404
26-Mar-03 358
27-Mar-03 414
28-Mar-03 405
29-Mar-03 441