Site ID: 311 Lat. 61.2510 Russia Sakha (Yakutiya)
River: Lena Long. 128.4978
Site name: Bulgunnyakhtakh Contributing area: 882350 km2 Ratio to Comparison Station: 31.25
Latest measurement: 3-Aug-10 Mean annual runoff: 24 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 13.7 mm
Latest M/C ratio: 1.47 Seven day total: 1.0 mm
Estimated current discharge: 1547 m3/sec Percent of mean 7-day total: 97.2 % (today's value compared to mean for same period, 2003-2009)
5 yr recurrence flood: 3335 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 3415 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
8 2002 no data no data no data no data no data no data no data 3.9 2.9 0.9 0.0 0.0
20 2003 0.0 0.0 0.0 0.0 0.7 4.4 4.7 4.9 3.6 1.8 0.0 0.0
24 2004 0.0 0.0 0.0 0.1 1.1 6.8 5.5 4.7 4.1 1.9 0.0 0.0
21 2005 0.0 0.0 0.0 0.1 1.9 5.3 5.7 4.1 3.1 0.7 0.0 0.0
27 2006 0.0 0.0 0.0 0.0 1.7 9.7 5.3 4.6 3.9 1.3 0.0 0.0
24 2007 0.0 0.0 0.0 0.6 3.1 6.4 4.8 4.8 3.3 0.9 0.0 0.0
24 2008 0.0 0.0 0.0 0.0 2.7 5.7 4.8 4.7 4.2 1.9 0.1 0.0
25 2009 0.0 0.0 0.0 0.1 2.5 6.8 5.4 3.9 4.6 1.7 0.0 0.0
14 2010 0.0 0.0 0.0 0.0 2.6 5.0 5.2 0.9 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 24 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 2253
23-Jul-02 2253
24-Jul-02 2008
25-Jul-02 1928
26-Jul-02 1611
27-Jul-02 1295
28-Jul-02 1416
29-Jul-02 1545
30-Jul-02 1646
31-Jul-02 1887
1-Aug-02 1929
2-Aug-02 1947
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 1941
10-Aug-02 1831
11-Aug-02 1702
12-Aug-02 1526
13-Aug-02 1535
14-Aug-02 1665
15-Aug-02 1590
16-Aug-02 1775
17-Aug-02 1784
18-Aug-02 1378
19-Aug-02 1576
20-Aug-02 1320
21-Aug-02 1287
22-Aug-02 1479
23-Aug-02 1530
24-Aug-02 1570
25-Aug-02 1558
26-Aug-02 1560
27-Aug-02 1348
28-Aug-02 1354
29-Aug-02 1423
30-Aug-02 1554
31-Aug-02 1479
1-Sep-02 1602
2-Sep-02 1431
3-Sep-02 1163
4-Sep-02 1346
5-Sep-02 1238
6-Sep-02 1356
7-Sep-02 1615
8-Sep-02 1577
9-Sep-02 1411
10-Sep-02 1287
11-Sep-02 1259
12-Sep-02 958
13-Sep-02 1034
14-Sep-02 1221
15-Sep-02 784
16-Sep-02
17-Sep-02
18-Sep-02
19-Sep-02
20-Sep-02
21-Sep-02 528
22-Sep-02 868
23-Sep-02 888
24-Sep-02 1126
25-Sep-02 1296
26-Sep-02 1266
27-Sep-02 1246
28-Sep-02 1029
29-Sep-02 894
30-Sep-02 924
1-Oct-02 1100
2-Oct-02 1055
3-Oct-02 1015
4-Oct-02 1025
5-Oct-02 800
6-Oct-02 881
7-Oct-02 814
8-Oct-02 656
9-Oct-02 662
10-Oct-02 333
11-Oct-02 216
12-Oct-02 90
13-Oct-02 18
14-Oct-02 109
15-Oct-02 289
16-Oct-02 264
17-Oct-02 159
18-Oct-02 80
19-Oct-02 3
20-Oct-02 3
21-Oct-02 3
22-Oct-02 3
23-Oct-02 3
24-Oct-02 3
25-Oct-02 3
26-Oct-02 3
27-Oct-02 3
28-Oct-02 3
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
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 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 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 3
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 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 3
9-Jan-03 3
10-Jan-03 3
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 3
22-Jan-03 3
23-Jan-03 3
24-Jan-03 3
25-Jan-03 3
26-Jan-03 3
27-Jan-03 3
28-Jan-03 3
29-Jan-03 3
30-Jan-03 3
31-Jan-03 3
1-Feb-03 3
2-Feb-03 3
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 3
19-Feb-03 3
20-Feb-03 3
21-Feb-03 3
22-Feb-03 3
23-Feb-03 3
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 3
13-Mar-03 3
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 3
22-Mar-03 3
23-Mar-03 3
24-Mar-03 3
25-Mar-03 3
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 3
4-Apr-03 3
5-Apr-03 3
6-Apr-03 3
7-Apr-03 3
8-Apr-03 3
9-Apr-03 3
10-Apr-03 3
11-Apr-03 3
12-Apr-03 3
13-Apr-03 3
14-Apr-03 3
15-Apr-03 3
16-Apr-03 3
17-Apr-03 44
18-Apr-03 26
19-Apr-03 29
20-Apr-03 3
21-Apr-03 3
22-Apr-03 3
23-Apr-03 3
24-Apr-03 3
25-Apr-03 3