Site ID: 998 Lat. 41.3207 USA 0
River: Wallkill Long. -74.4835
Site name: 0 Contributing area: 574 km2 Ratio to Comparison Station: 0.02
Latest measurement: 20-Jul-10 Mean annual runoff: 1035 mm (2003-2009)
Hydrologic status: 2 Normal flow Total runoff this year (2010): 1358.1 mm
Latest M/C ratio: 1.10 Seven day total: 3.5 mm
Estimated current discharge: 3 m3/sec Percent of mean 7-day total: 13.6 % (today's value compared to mean for same period, 2003-2009)
5 yr recurrence flood: 772 m3/sec (from Log Pearson III analysis)
Status Codes:  1 = Low flow or ice, 2 = Normal flow, 3 = Flood, 4 = Major Flood 739 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
73 2002 no data no data no data no data no data no data no data 12.5 13.0 15.5 15.0 17.4
960 2003 175.8 14.0 284.8 15.0 15.5 29.4 15.5 15.5 59.2 81.5 12.0 242.2
256 2004 15.5 45.3 29.3 15.2 15.5 14.5 15.5 15.5 44.2 15.5 15.0 15.5
1658 2005 27.3 14.0 71.4 876.1 15.5 15.0 1.5 15.0 15.0 571.1 21.0 15.5
513 2006 342.4 53.4 10.5 15.0 15.5 15.0 15.5 15.5 15.0 15.5 0.0 0.0
1721 2007 15.5 113.2 94.7 939.1 48.1 15.0 15.5 19.4 15.0 15.5 15.0 415.3
500 2008 23.1 121.5 15.5 15.0 15.5 15.0 130.2 15.5 15.0 15.5 15.0 103.6
1636 2009 428.1 613.3 15.5 15.0 15.5 15.0 15.5 15.5 15.0 15.5 15.0 457.3
1358 2010 15.5 16.4 970.4 222.6 106.7 15.0 11.5 0.0 0.0 0.0 0.0 0.0
Mean Annual Runoff (mm): 1035 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 3
23-Jul-02 3
24-Jul-02 3
25-Jul-02 3
26-Jul-02 3
27-Jul-02 3
28-Jul-02 3
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1-Aug-02 3
2-Aug-02 3
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9-Aug-02 3
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1-Jan-03 3
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8-Jan-03 61
9-Jan-03 12
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12-Jan-03 50
13-Jan-03 242
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15-Jan-03 151
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17-Jan-03 66
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