Site ID: 917 Lat. 48.0721 USA North Dakota
River: Missouri Long. -103.7239
Site name: Williston Contributing area: 421944 km2 Ratio to Comparison Station: 14.94
Latest measurement: 20-Jul-10 Mean annual runoff: 2 mm (2003-2009)
Hydrologic status: 3 Flood Total runoff this year (2010): 3.6 mm
Latest M/C ratio: 1.21 Seven day total: 0.8 mm
Estimated current discharge: 420 m3/sec Percent of mean 7-day total: 614.9 % (today's value compared to mean for same period, 2003-2009)
5 yr recurrence flood: 550 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 524 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 1.4 0.2 0.0 0.0 0.0
3 2003 0.1 0.0 0.0 0.1 0.3 1.1 0.5 0.9 0.0 0.0 0.0 0.0
1 2004 0.0 0.0 0.1 0.0 0.0 0.0 0.1 0.6 0.1 0.0 0.0 0.1
1 2005 0.1 0.0 0.0 0.0 0.1 0.2 0.0 0.5 0.0 0.0 0.0 0.0
2 2006 0.0 0.0 0.0 0.0 0.1 0.1 0.6 0.6 0.0 0.0 0.0 0.0
1 2007 0.0 0.0 0.0 0.0 0.2 0.3 0.3 0.4 0.1 0.0 0.0 0.0
4 2008 0.0 0.0 0.0 0.0 0.0 0.4 1.8 1.2 0.4 0.1 0.0 0.0
4 2009 0.0 0.0 0.0 0.0 0.0 0.5 0.8 1.4 0.9 0.1 0.1 0.0
4 2010 0.0 0.0 0.0 0.0 0.0 1.0 2.5 0.0 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 2 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-02 103
23-Jul-02 103
24-Jul-02 62
25-Jul-02 24
26-Jul-02 75
27-Jul-02 117
28-Jul-02 172
29-Jul-02 231
30-Jul-02 128
31-Jul-02 87
1-Aug-02 87
2-Aug-02 44
3-Aug-02
4-Aug-02
5-Aug-02
6-Aug-02
7-Aug-02
8-Aug-02
9-Aug-02 1677
10-Aug-02 897
11-Aug-02 627
12-Aug-02 547
13-Aug-02 254
14-Aug-02 260
15-Aug-02 201
16-Aug-02 154
17-Aug-02 209
18-Aug-02 103
19-Aug-02 122
20-Aug-02 113
21-Aug-02 81
22-Aug-02 95
23-Aug-02 133
24-Aug-02 193
25-Aug-02 168
26-Aug-02 206
27-Aug-02 177
28-Aug-02 132
29-Aug-02 130
30-Aug-02 148
31-Aug-02 187
1-Sep-02 220
2-Sep-02 213
3-Sep-02 97
4-Sep-02 10
5-Sep-02 3
6-Sep-02 3
7-Sep-02 39
8-Sep-02 32
9-Sep-02 50
10-Sep-02 3
11-Sep-02 16
12-Sep-02 28
13-Sep-02 43
14-Sep-02 75
15-Sep-02 14
16-Sep-02 118
17-Sep-02
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21-Sep-02 3
22-Sep-02 3
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28-Sep-02 3
29-Sep-02 3
30-Sep-02 3
1-Oct-02 3
2-Oct-02 3
3-Oct-02 3
4-Oct-02 3
5-Oct-02 3
6-Oct-02 3
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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 34
1-Jan-03 133
2-Jan-03 180
3-Jan-03 27
4-Jan-03 34
5-Jan-03 3
6-Jan-03 3
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29-Mar-03 101
30-Mar-03 12
31-Mar-03 4
1-Apr-03 3
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22-Apr-03 16
23-Apr-03 44
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27-Apr-03 63
28-Apr-03 42
29-Apr-03 44
30-Apr-03 18
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15-May-03 76
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24-May-03 39
25-May-03 121
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28-May-03 185
29-May-03 132
30-May-03 70
31-May-03 103
1-Jun-03 101
2-Jun-03 212
3-Jun-03 303
4-Jun-03 288
5-Jun-03 379
6-Jun-03 292
7-Jun-03 276
8-Jun-03 229
9-Jun-03 120
10-Jun-03 111
11-Jun-03 28
12-Jun-03 3
13-Jun-03 3