Site ID: 2089 Lat. 35.1613 China Henan
River: Yellow (Huang He) Long. 114.8731
Site name: Naokao Contributing area: 865081 km2 Ratio to Comparison Station: 30.63
Latest measurement: 6-Sep-11 Mean annual runoff: 8 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 8.9 mm
Latest M/C ratio: 1.10 Seven day total: 0.1 mm
Estimated current discharge: 3 m3/sec Percent of mean 7-day total: 55.6 % (today's value compared to mean for same period, 2003-2009)
5 yr recurrence flood: 1735 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 2139 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
2 2002 no data no data no data no data no data no data no data 1.2 0.3 0.1 0.0 0.0
15 2003 0.0 0.0 0.1 0.6 1.2 1.1 0.3 0.2 1.2 4.3 3.8 1.7
5 2004 0.4 0.2 0.4 0.8 0.9 0.4 0.4 0.4 0.5 0.3 0.0 0.0
8 2005 0.0 0.0 0.4 0.8 0.9 1.0 0.8 0.7 0.7 2.5 0.2 0.1
11 2006 0.1 0.5 0.9 0.9 1.6 1.6 2.1 1.3 1.0 1.1 0.0 0.0
8 2007 0.0 0.2 0.8 0.8 1.0 1.0 1.0 1.1 1.1 0.4 0.5 0.1
6 2008 0.0 0.0 0.3 0.5 1.2 0.9 0.6 0.9 0.8 0.4 0.1 0.0
7 2009 0.0 0.1 0.7 0.8 0.8 1.2 0.8 1.2 0.9 0.5 0.1 0.0
9 2010 0.0 0.0 0.2 0.5 0.7 1.3 1.4 0.8 1.5 1.4 0.5 0.5
Mean Annual Runoff (mm): 8 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-02 614
23-Jul-02 614
24-Jul-02 578
25-Jul-02 450
26-Jul-02 427
27-Jul-02 299
28-Jul-02 401
29-Jul-02 548
30-Jul-02 922
31-Jul-02 922
1-Aug-02 1030
2-Aug-02 1030
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 582
10-Aug-02 248
11-Aug-02 433
12-Aug-02 433
13-Aug-02 251
14-Aug-02 412
15-Aug-02 367
16-Aug-02 340
17-Aug-02 615
18-Aug-02 575
19-Aug-02 523
20-Aug-02 641
21-Aug-02 540
22-Aug-02 578
23-Aug-02 448
24-Aug-02 429
25-Aug-02 383
26-Aug-02 347
27-Aug-02 399
28-Aug-02 345
29-Aug-02 418
30-Aug-02 438
31-Aug-02 519
1-Sep-02 418
2-Sep-02 232
3-Sep-02 271
4-Sep-02 175
5-Sep-02 186
6-Sep-02 321
7-Sep-02 186
8-Sep-02 104
9-Sep-02 61
10-Sep-02 61
11-Sep-02 73
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-02 117
22-Sep-02 117
23-Sep-02 148
24-Sep-02 96
25-Sep-02 195
26-Sep-02 152
27-Sep-02 77
28-Sep-02 34
29-Sep-02 3
30-Sep-02 3
1-Oct-02 7
2-Oct-02 188
3-Oct-02 165
4-Oct-02 144
5-Oct-02 178
6-Oct-02 173
7-Oct-02 67
8-Oct-02 42
9-Oct-02 3
10-Oct-02 3
11-Oct-02 3
12-Oct-02 3
13-Oct-02 3
14-Oct-02 3
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 3
24-Oct-02 44
25-Oct-02 44
26-Oct-02 17
27-Oct-02 77
28-Oct-02 78
29-Oct-02 3
30-Oct-02 3
31-Oct-02 3
1-Nov-02 3
2-Nov-02 3
3-Nov-02 3
4-Nov-02 3
5-Nov-02 3
6-Nov-02 3
7-Nov-02 3
8-Nov-02 3
9-Nov-02 3
10-Nov-02 3
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24-Nov-02 3
25-Nov-02 3
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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 3
6-Dec-02 3
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9-Dec-02 3
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13-Dec-02 3
14-Dec-02 3
15-Dec-02 3
16-Dec-02 3
17-Dec-02 3
18-Dec-02 3
19-Dec-02 3
20-Dec-02 3
21-Dec-02 70
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 3
9-Jan-03 3
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24-Jan-03 3
25-Jan-03 3
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30-Jan-03 3
31-Jan-03 3
1-Feb-03 3
2-Feb-03 3
3-Feb-03 3
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24-Feb-03 3
25-Feb-03 3
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 3
10-Mar-03 3
11-Mar-03 3
12-Mar-03 17
13-Mar-03 26
14-Mar-03 3
15-Mar-03 3
16-Mar-03 8
17-Mar-03 40
18-Mar-03 102
19-Mar-03 101
20-Mar-03 116
21-Mar-03 137
22-Mar-03 60
23-Mar-03 3
24-Mar-03 3
25-Mar-03 3
26-Mar-03 3
27-Mar-03 84
28-Mar-03 20
29-Mar-03 27