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Site ID: 357 Lat. 47.8388 Russia Astrakhanskaya
River: Volga Long. 46.3730
Site name: Nikolskoye Contributing area: 1372813 km2 Ratio to Comparison Station: 48.61
Latest measurement: 16-Jul-10 Mean annual runoff: 26 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 16.0 mm
Latest M/C ratio: 1.46 Seven day total: 0.8 mm
Estimated current discharge: 1468 m3/sec Percent of mean 7-day total: 118.5 % (today's value compared to mean for same period, 2003-2009)
5 yr recurrence flood: 7691 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 7385 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
5 2002 no data no data no data no data no data no data no data 1.4 1.4 1.0 0.5 0.4
18 2003 0.0 0.0 0.0 1.3 6.6 4.8 2.3 1.7 1.0 0.4 0.2 0.1
21 2004 0.1 0.0 0.5 1.9 7.7 3.8 2.2 1.9 1.1 0.7 0.5 0.3
30 2005 0.3 0.4 0.9 2.7 8.4 6.1 0.6 3.8 2.8 1.5 1.0 1.2
23 2006 0.2 0.0 0.4 2.0 4.7 4.7 3.5 3.3 2.1 1.8 0.0 0.0
37 2007 0.9 0.8 1.7 3.6 8.9 6.6 3.9 3.5 2.2 2.2 1.1 1.2
29 2008 0.3 1.1 0.9 3.6 7.7 3.5 3.4 3.1 2.0 1.5 1.2 0.8
25 2009 0.0 0.0 0.6 2.2 7.3 4.4 3.4 1.8 1.9 1.6 1.0 0.8
16 2010 0.2 0.0 0.2 1.4 7.3 4.9 1.9 0.0 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 26 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 1737
23-Jul-02 1737
24-Jul-02 1739
25-Jul-02 1573
26-Jul-02 1612
27-Jul-02 1697
28-Jul-02 1706
29-Jul-02 1932
30-Jul-02 1800
31-Jul-02 1782
1-Aug-02
2-Aug-02
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 913
10-Aug-02 1107
11-Aug-02 1313
12-Aug-02 1262
13-Aug-02 1296
14-Aug-02 1300
15-Aug-02 975
16-Aug-02 974
17-Aug-02 843
18-Aug-02 936
19-Aug-02 912
20-Aug-02 995
21-Aug-02 1097
22-Aug-02 1044
23-Aug-02 1111
24-Aug-02 940
25-Aug-02 926
26-Aug-02 871
27-Aug-02 758
28-Aug-02 654
29-Aug-02 698
30-Aug-02 665
31-Aug-02 718
1-Sep-02 973
2-Sep-02 896
3-Sep-02 878
4-Sep-02 837
5-Sep-02 741
6-Sep-02 710
7-Sep-02 581
8-Sep-02 693
9-Sep-02 833
10-Sep-02 818
11-Sep-02 849
12-Sep-02 970
13-Sep-02 839
14-Sep-02 875
15-Sep-02 1219
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 704
22-Sep-02 704
23-Sep-02 927
24-Sep-02 1166
25-Sep-02 1414
26-Sep-02 1180
27-Sep-02 992
28-Sep-02 763
29-Sep-02 557
30-Sep-02 675
1-Oct-02 767
2-Oct-02 553
3-Oct-02 742
4-Oct-02 563
5-Oct-02 615
6-Oct-02 712
7-Oct-02 561
8-Oct-02 636
9-Oct-02 676
10-Oct-02 950
11-Oct-02 732
12-Oct-02 616
13-Oct-02 418
14-Oct-02 401
15-Oct-02 363
16-Oct-02 346
17-Oct-02 424
18-Oct-02 130
19-Oct-02 425
20-Oct-02 485
21-Oct-02 627
22-Oct-02 678
23-Oct-02 596
24-Oct-02 664
25-Oct-02 405
26-Oct-02 496
27-Oct-02 403
28-Oct-02 384
29-Oct-02 372
30-Oct-02 395
31-Oct-02 359
1-Nov-02 369
2-Nov-02 448
3-Nov-02 354
4-Nov-02 429
5-Nov-02 407
6-Nov-02 547
7-Nov-02 67
8-Nov-02 3
9-Nov-02 3
10-Nov-02 3
11-Nov-02 3
12-Nov-02 211
13-Nov-02 340
14-Nov-02 225
15-Nov-02 371
16-Nov-02 418
17-Nov-02 274
18-Nov-02 300
19-Nov-02 133
20-Nov-02 277
21-Nov-02 286
22-Nov-02 306
23-Nov-02 257
24-Nov-02 184
25-Nov-02 194
26-Nov-02 115
27-Nov-02 393
28-Nov-02 371
29-Nov-02 409
30-Nov-02 434
1-Dec-02 288
2-Dec-02 132
3-Dec-02 31
4-Dec-02 3
5-Dec-02 3
6-Dec-02 305
7-Dec-02 656
8-Dec-02 821
9-Dec-02 1024
10-Dec-02 849
11-Dec-02 760
12-Dec-02 458
13-Dec-02 339
14-Dec-02 182
15-Dec-02 136
16-Dec-02 56
17-Dec-02 3
18-Dec-02 3
19-Dec-02 3
20-Dec-02 3
21-Dec-02 3
22-Dec-02 4
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 16
3-Jan-03 56
4-Jan-03 20
5-Jan-03 20
6-Jan-03 3
7-Jan-03 3
8-Jan-03 3
9-Jan-03 3
10-Jan-03 3
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1-Mar-03 3
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