#  Begin METADATA documentation
# ------------------------------------------------------------------------------------------------------
#  DATASET_NAME: 	MRB5.drainagebasins.txt
#  DATASET_DESCRIPTION:	This data set was used as part of a nutrient, sediment, and streamflow trend 
#			assessment for the Lower-Mississippi, Arkansas-White-Red, Texas-Gulf Basins.
#  DATA_SET FORMAT:	Tab-delimited ascii file
#  DATA_SET URL:
#
# ------------------------------------------------------------------------------------------------------ 
#  REPORT TITLE: 	Trends in Nutrient and Sediment Concentrations and Loads in Major River Basins
#			of the South-Central United States, 1993-2004    
#  REPORT SERIES/NUMBER (JOURNAL NAME/VOLUME): USGS Scientific Investigation Report (SIR 2007-5090)     
#  REPORT URL:		http://pubs.usgs.gov/sir/2007/5090/
#
# ------------------------------------------------------------------------------------------------------
#  NAWQA STUDY:		Major River Basin 5
#
# ------------------------------------------------------------------------------------------------------
#
#  METADATA DATE:    	July, 2008
#  METADATA CONTACT: 	Richard A. Rebich
#                    	USGS-WRD, Mississippi Water Science Center 
#                    	308 South Airport Road
#	 	     	Jackson, MS  39208-6649	
#                    	voice: 601-933-2928
#                    	fax:   601-933-2901
#                    	email:  rarebich@usgs.gov
#
#  SECONDARY CONTACT:   Dennis Demcheck
#                    	USGS-WRD, Louisiana Water Science Center 
#                    	3535 S. Sherwood Forest Blvd., Suite 120
#	 	     	Baton Rouge, LA  70816	
#                    	voice: 225-298-5481, ext.3214
#                    	fax:   225-298-5490
#                    	email:  ddemchec@usgs.gov
#
# ------------------------------------------------------------------------------------------------------
#  METADATA Data Description:  
#
#  ABSTRACT:  
#	This file documents the location of drainage area boundaries delineated for surface water quality 
#	stations used in the report, "Trends in Nutrient and Sediment Concentrations and Loads in Major 
#	River Basins of the South-Central United States, 1993-2004," by Rebich and Demcheck, USGS 
#	Scientific Investigation Report (SIR 2007-5090), located at http://pubs.usgs.gov/sir/2007/5090/.  
#	The drainage area boundaries were used as digital polygon overlays to partition GIS-derived 
#	ancillary data at each station.  Station-specific ancillary data were then used as explanatory 
#	information to help understand notable water-quality trends that were documented in SIR 2007-5090.
#
#  SUPPLEMENTAL INFORMATION:
#
#	The drainage basin boundaries for each water-quality station were obtained from one of 2 NAWQA 
#	websites (http://water.wr.usgs.gov/pnsp/gis/data/swancil/mrb.html, or 
#	http://water.wr.usgs.gov/pnsp/gis/data/swancil/cycle2.html).  These two websites contained 
#	data that had originally been compiled from other external sources, which are further described 
#	in Rebich and Demcheck, 2007 (SIR 2007-5090).  
#
#	The drainage area boundaries were used to partition ancillary data compiled from National GIS 
#	datasets such as atmospheric deposition, ferilizer use, and land-application of manure.  Summaries
#	of the ancillary data are in MRB5_ancil_data.txt, MRB5_pop_dens.txt, and MRB5_cons_prac.txt.  
#	Trends in ancillary data were then related to trends in water-quality data using weighted-least
#	-squares (WLS) regression analysis.  Input and results for WLS analysis are found in files 
#	MRB5_WLS_input.txt and MRB5_WLS_results.txt, repsectively.
#
#
# ------------------------------------------------------------------------------------------------------
