#  Begin METADATA documentation
------------------------------------------------------------------------------------------------------
#  DATASET_NAME: 	MRB4A.sussed.loads.txt
#  DATASET_DESCRIPTION:	This data set was used as part of a nutrient, sediment, and streamflow trend 
#			assessment for the Missouri River Basin.
#  DATA_SET FORMAT:	Tab-delimited ascii file
#  DATA_SET URL:
#
#-------------------------------------------------------------------------------------------------------- 
#  REPORT TITLE: 	Nutrient and Suspended-Sediment Trends in the Missouri River Basin, 1993-2003    
#  REPORT SERIES/NUMBER (JOURNAL NAME/VOLUME): USGS Scientific Investigation Report (SIR 2006-5231)     
#  REPORT URL:		http://pubs.usgs.gov/sir/2006/5231/
#
#-------------------------------------------------------------------------------------------------------
#  NAWQA STUDY:		Major River Basin 4
#
#-------------------------------------------------------------------------------------------------------
#
#  METADATA DATE:    	August 7, 2006
#  METADATA CONTACT: 	Lori Sprague
#                    	USGS-WRD, Colorado Water Science Center 
#                    	Major River Basin study  Missouri River Basin
#                    	Denver Federal Center, Bldg. 53, MS 415,
#	 	     	Lakewood, CO 80225	
#                    	voice: 303-236-4882 x262
#                    	fax:   303-236-4912
#                    	email:  lsprague@usgs.gov
#
#  SECONDARY CONTACT:   David L. Rus
#                    	USGS-WRD, Nebraska Water Science Center 
#                    	Major River Basin study  Missouri River Basin
#                    	5231 South 19th
#	 	     	Lincoln, NE  68512	
#                    	voice: 402-328-4127
#                    	fax:   402-328-4101
#                    	email:  dlrus@usgs.gov
#
# ------------------------------------------------------------------------------------------------------
#  METADATA Data Description:  
#
#  ABSTRACT:  This data set contains estimates of total suspended sediment loads at selected sites in the 
#	Missouri River Basin, produced by the S-LOADEST model in 2005. 
#	Details on model specification are provided in an appendix of Sprague and others, 2006 
#	(SIR 2006-5231). The data were used in a report documenting trends in the Missouri River Basin 
#	as part of the U.S. Geological Survey, National	Water-Quality Assessment Program.
#
#  SUPPLEMENTAL INFORMATION:
#   	PROCEDURES USED:
#	PROCESS STEP:
#	Suspended sediment concentration and mean daily discharge were retrieved from the US Geological 
#	 Survey National Water Information System between December 2004 and February 2005.
#
#	A streamflow record reflecting the average condition at each site was used in place of the actual 
#	 streamflow to minimize the effect of hydrologic variability on the load estimates.  This median 
#	 streamflow data set was derived at each site by: (1) compiling the annual streamflows for each 
#	 calendar year of record, (2) identifying the three calendar years closest to the median of the 
#	 annual streamflow (with the exception of sites with five or fewer years of streamflow record, 
#	 where the 2 years closest to the median were used to avoid high or low bias in the load estimates), 
#	 (3) compiling the daily mean streamflow records corresponding to the three (or two) calendar years 
#	 identified in the previous step, and (4) replacing the streamflow data during the years corresponding 
#	 to the calibration data with this median streamflow data.  This approach had the advantage of producing 
#	 load estimates with less hydrologic variability between sites, which facilitated identification of 
#	 landscape characteristics affecting spatial patterns in load.  However, these load estimates are not 
#	 representative of real-world conditions; they cannot be interpreted as loads that actually occurred at 
#	 any point in time at these sites. The total load estimates ultimately were divided by the number of 
#	 days in the record and the contributing drainage area to produce the mean daily sediment yield (MDSY) 
#	 at each site.  The MDSYs were used in all subsequent analyses in the report.
#
#
#  RELATED SPATIAL AND TABULAR DATA SETS:
#
#
#	All files listed below were used in the analysis for the report Sprague and others, 2006 
#	 (SIR 2006-5231).  These files	are all being documented and archived for this report.
#
#	Trends from 1993 to 2003:		
#		Streamflow: MRB4A.Q.txt
#		Water quality: MRB4A.TN.txt, MRB4A.NOX.txt, MRB4A.NH3.txt, MRB4A.TP.txt, 
#		MRB4A.OP.txt, MRB4A.SS.txt 
#	Base-flow nitrate loads:
#		MRB4A.baseflow.NOX.txt, MRB4A.baseflow.Q.txt, MRB4A.baseflow.NOX.loads.txt
#	Trends from 1985 to 2003:
#		Streamflow: MRB4A.Q.85.03.txt
#		Water quality: MRB4A.TN.85.03.txt, MRB4A.NOX.85.03.txt, MRB4A.TP.85.03.txt, 
#		MRB4A.OP.85.03.txt, MRB4A.SS.85.03.txt 	
#	Suspended-sediment yields:
#		MRB4A.sussed.loads.calibration.txt, MRB4A.Q.sussed.loads.txt, MRB4A.sussed.loads.txt
# ------------------------------------------------------------------------------------------------------
#  METADATA Basic documentation of dataset elements:
#
#     DATA FIELD LABELS:
#
#     	STAID
#	METHOD
#	FLUX
#	VARIANCE
#	NDAYS	
#	LOAD
#	CI_LOWER.95
#	CI_UPPER.95
#	SEP
#
#     DATA FIELD LENGHT/TYPES: Note:  The row in the data file that follows the row of variable names describes the 
#                 width of the field and the data type. 
#			
#			Code:		Variable Type		Variable Length
#                 ----------------------------------------------------------------			
#			S or s 		text variable		numeric value preceding code 
#               	D or d		date variable		numeric value preceding code
#			N or n		numeric variable	numeric value preceding code
#									 
#                 For example: 15s indicates a 0- to 15-character text variable whereas
#                 9N indicates a 0- to 9-digit numeric variable.
#
#--------------------------------------------------------------------------------------------------------
#  METADATA Detailed documentation of dataset elements for Constiuent NOX: 
#
#       DATA FIELD LABEL:  		STAID
#       Data Field Description:		USGS Station Identifier
#	Data Field Length/Type:		15S			
#       Data Source: 			USGS National Water Information System (NWIS)
#       Retrieval Date:  		December 2004 to February 2005
#
#
#       DATA FIELD LABEL:  		METHOD
#       Data Field Description:		Load calculation method used in software S-LOADEST
#	Data Field Length/Type:		4S
#       Data Source: 			S-LOADEST Software
#       Retrieval Date:			NA
#
#					Codes for METHOD:	
#					AMLE = adjusted maximum likelihood estimation
#					LAD = least absoluted deviation 		
#
#
#       DATA FIELD LABEL:  		FLUX
#       Data Field Description:		Average daily flux for suspended sediment for the period of NDAYS
#	Data Field Length/Type:		9n
#       Data Units: 			kilograms per day
#       Data Source: 			Calculated using software S-LOADEST
#       Retrieval Date:  		NA
#
#
#       DATA FIELD LABEL:  		VARIANCE
#       Data Field Description:		Variance of average daily flux for suspended sediment for the period of NDAYS
#	Data Field Length/Type:		10n
#       Data Units: 			kilograms per day
#       Data Source: 			Calculated using software S-LOADEST
#       Retrieval Date:  		NA
#
#
#       DATA FIELD LABEL:  		NDAYS
#       Data Field Description:		Number of days in flux calculation period
#					(Note:  Input prediction data has only one observation per day
#	Data Field Length/Type:		4n
#       Data Units: 			day
#       Data Source: 			USGS National Water Information System (NWIS)
#       Retrieval Date:  		NA
#
#
#       DATA FIELD LABEL:  		LOAD
#       Data Field Description:		Total load for suspended sediment for the period of NDAYS
#	Data Field Length/Type:		10n
#       Data Units: 			Kilograms per year
#       Data Source: 			Calculated using software S-LOADEST
#       Retrieval Date:  		NA
#
#
#       DATA FIELD LABEL:  		CI_LOWER.95
#       Data Field Description:		Lower 95% confidence limit of average daily flux for suspended sediment for the period of NDAYS
#	Data Field Length/Type:		9n
#       Data Units: 			kilograms per day
#       Data Source: 			Calculated using software S-LOADEST
#       Retrieval Date:  		NA
#	NOTE:				Calculated for AMLE method only
#
#
#       DATA FIELD LABEL:  		CI_UPPER.95
#       Data Field Description:		Upper 95% confidence limit of average daily flux for suspended sediment for the period of NDAYS
#	Data Field Length/Type:		10n
#       Data Units: 			kilograms per day
#       Data Source: 			Calculated using software S-LOADEST
#       Retrieval Date:  		NA
#	NOTE:				Calculated for AMLE method only
#
#
#       DATA FIELD LABEL:  		SEP
#       Data Field Description:		Standard error of prediction of average daily flux for suspended sediment for the period of NDAYS
#	Data Field Length/Type:		8n
#       Data Units: 			kilograms per day
#       Data Source: 			Calculated using software S-LOADEST
#       Retrieval Date:  		NA
#	NOTE:				Calculated for AMLE method only
#
#
#  End METADATA documentation
#
#  BEGIN DATA: MRB4A.sussed.loads.txt
# ------------------------------------------------------------------------------------------------------
Station	Method	Flux	Variance	NDAYS	Load	CI_Lower.95	CI_Upper.95	SEP
15s	4s	9n	10n	4n	10n	9n	10n	8n
06130500	AMLE	531374.5	8598248371	1096	582386421	357397.4	761193.7	103445.2
06187915	AMLE	7194.731	4481021	1096	7885425	3817.739	12389.58	2210.258
06191500	AMLE	681450.4	18157949129	1095	746188193	446957	996409.7	140836.4
06208500	LAD	2185681	2.51E+12	1095	2393320460			
06214500	AMLE	5714265	4.68E+12	1096	6262834983	2537881	11155579	2237632
06279500	LAD	4483329	3.45E+12	1096	4913728924			
06295000	AMLE	4246289	7.14E+11	731	3104037620	2747969	6276621	904744.4
06298000	LAD	10837.09	2060049	1095	11866616			
06324970	AMLE	106765.1	6182700750	1096	117014514	19683.02	341061	89197.56
06326500	AMLE	20391349	7.85E+15	1095	22328526643	150507.7	135746486	89703134
06329500	AMLE	31026598	5.24E+15	1095	33974125188	838364.9	177571132	72541251
06441500	AMLE	2155560	7.50E+11	1095	2360338730	728090.5	5009600	1128103
06452000	AMLE	14861352	1.97E+13	1095	16273180692	7592966	26306686	4831756
06705500	LAD	7442.969	5039078	731	5440810			
06714000	AMLE	151162.2	1412322880	1095	165522614	87002.44	244947.5	40621.62
06714400	AMLE	1231.399	90568.27	731	900152.8	691.6336	2032.704	345.161
06714800	AMLE	807.6896	21890.1	1096	885227.8	537.161	1167.731	161.5791
06720500	AMLE	85173.8	274512720	1095	93265309	53570.38	128805.5	19303.35
06754000	AMLE	280580.3	947518455	1095	307235406	216657.8	357480.8	35989.58
06759910	AMLE	794363.2	31390344535	1095	869827731	477058.8	1245741	197459
06800000	AMLE	1261053	5.08E+11	1095	1380853183	320556.2	3438978	838915.8
06800500	AMLE	4772727	4.10E+11	1096	5230908640	3414758	6493780	787843.6
06805500	AMLE	10481496	2.48E+12	1095	11477238493	7495572	14267026	1732658
06879100	AMLE	4683480	3.58E+12	1096	5133094354	1954267	9531994	1973317
06882000	AMLE	2360895	5.95E+11	1095	2585180328	1090969	4485842	879983.1
06884025	AMLE	1561318	3.14E+11	1096	1711204299	721885.7	2965461	581542.3
06887000	AMLE	256937.7	5626493478	1095	281346759	138760.8	436748.8	76791.23
06888500	AMLE	3869330	1.12E+14	1096	4240785457	70278.53	23580028	10967696
06891500	AMLE	220617.7	17466975991	1095	241576349	58247.06	589616.8	142502.3
06923150	AMLE	182076.2	9.09E+11	1096	199555539	922.9935	1233432	965520.8
06929315	AMLE	78024.35	2.23E+11	731	57035799	302.0167	531866.4	473954.8
06934500	AMLE	124838142	2.15E+14	1095	1.37E+11	96604660	158753430	15882657

