River Watch Version 3.4														G. R. Brakenridge*
Experimental Satellite-Based River Discharge Measurements using passive microwave radiometry									Signal/Model agreement:		Good			T. De Groeve**
					Sagavanirktok		Center:	-148.724	Long.	S/N rating:	Very Good			S. Cohen***
GFDS Site Number		881	Predicted Flooded Area		USA		Center:	69.974	Lat.					S.V. Nghiem****
GEE Time Lapse					Learn more about this river				11865	sq km	Station contributing area			A. J. Kettner*
Last measured:		24-Jul-17							Obtain Data					J.P.M. Syvitski*
Discharge:		37	m3/sec	37	Status:	2	(1, low; 2, normal flow; 3, moderate flood, r >1.5 y; 4, major flood, r >5 y)							*CSDMS/INSTAAR, University of Colorado
7-day Runoff		2.2	mm			93%	(7-day runoff compared to 8 y average for this date, 2003-2010)							**Joint Research Centre, Ispra, Italy
Flood Magnitude:		0.0	Scale of 0-10		Flood Magnitude Defined				Technical Summary					***University of Alabama
														****Jet Propulsion Laboratory, California
														Sensors: AMSR-E, AMSR-2, GPM
														Modeled sub-ice flow:		7	m3/sec
														Ice-cover detection operates during:
														Sept. 9-Oct. 31
														May 8 -May 30
														Annual Maximum Discharge
														2003	623	m3/sec
														2004	442	m3/sec
														2005	277	m3/sec
														2006	218	m3/sec
														2007	523	m3/sec
														2008	407	m3/sec
														2009	677	m3/sec
														2010	644	m3/sec
		Notes:	4-day forward moving average is applied.
			Low flow threshold is 20th percentile discharge for this day, 2003-2010.
														2014	403	m3/sec
														2015	682	m3/sec
														Flood Frequency Analysis, 2002-2015
															25 yr*
															808	m3/sec
															10 yr*
															719	m3/sec
															5 yr (major flood)*
															634	m3/sec
															1.5 yr (bankfull flood)*
															392	m3/sec
															Mean Discharge
															34	m3/sec
															*From Log Pearson III
														Low Flow Threshold:		#N/A	m3/sec
	See also:	http://floodobservatory.colorado.edu/881IceCoverValidationviaMODIS.pdf							7	m3/sec	Modeled Dec.-March average					(for today)
														Chronology of Flood Magnitudes
														Signal/Model r2			0.52
														Signal/Model Agreement			Good
														Nash-Sutcliffe statistic*:			0.52
														*See Technical Summary
																	Mean
													Annual	Ice-	Mean	Runoff	Runoff
Monthly Runoff (total of daily runoff for each month; mm)													Total	free	Discharge	% of	2002-2011
	Jan	Feb	Mar	April	May	June	July	Aug	Sept	Oct	Nov	Dec	(mm)	days	(m3/sec)	Mean	81
																	Mean
																	Annual
																	Discharge
2002	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0	0.0				2003-2011
2003	1.6	1.5	1.6	1.5	7.0	41.6	15.9	15.5	8.9	4.6	1.5	1.6	103.0	157	39	127%	32
2004	1.6	1.4	1.6	1.5	10.8	42.7	13.4	13.7	12.5	2.4	1.5	1.6	104.8	133	39	130%
2005	1.6	1.4	1.6	1.5	1.6	29.2	13.2	8.1	7.8	1.6	1.5	1.6	70.9	123	27	88%
2006	1.6	1.4	1.6	1.5	2.3	23.0	8.7	8.9	10.4	11.7	1.5	1.6	74.3	151	28	92%
2007	1.6	1.5	1.6	1.5	3.6	30.7	8.4	8.1	7.9	1.6	1.5	1.6	69.8	127	26	86%
2008	1.6	1.4	1.6	1.5	10.0	28.8	8.1	8.0	8.1	2.9	1.5	1.6	75.3	139	28	93%
2009	1.6	1.4	1.6	1.5	8.9	49.0	11.6	10.2	11.3	1.6	1.6