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Reports & Publications

• Soil & Water Publications - University of Arkansas Cooperative Extension Service (UACES)
• Arkansas Water Resources Center (AWRC) Publications, University of Arkansas Division of Agriculture
• Water Division Planning Branch Publications, Arkansas Department of Environmental Quality (ADEQ)
• Water Division Reports, Arkansas Department of Environmental Quality (ADEQ)
• USGS National Water Quality Assessment (NAWQA) Program - Mississippi River Embayment Publications - Ozark Plateau Publications
  
• USDA Forest Service - Ozark-Ouachita Highlands - Aquatic Conditions
• Multi-Agency Wetland Planning Team (MAWPT) - Regional Planning Reports
• USDA Forest Service (SRS) - Research Publications Search Engine (criteria = water quality)

Water Quality & Flow Data 

• Arkansas Department of Environmental Quality - Water Quality Monitoring Data
  
• U.S. Geological Survey (USGS) - National Water Information System
• U.S. Geological Survey (USGS) - National Water Quality Assessment (NAWQA) Program
  
• Environmental Protection Agency (EPA) - STORET (Water quality data retrieval system)
• Environmental Protection Agency (EPA) - Nutrient Criteria Database
• National Pollution Discharge Elimination System (NPDES) - All permits for all types of facilities

Socioeconomic and Other Data

• U.S. Census Bureau - Quick Facts by County
• University of Arkansas - Extension - 2006 County Profiles
  
• National Agricultural Statistics Service - 2007 Census of Agriculture
• UALR Census State Data Center - Population Estimates & Projections by County
• Bureau of Economic Analysis - Arkansas Employment Data

Models 

• USDA - Agricultural Research Service (ARS) - Soil and Water Assessment Tool (SWAT)  
• Michigan State University (MSU) - RUSLE Soil Loss Assessment Tool
• USDA - Natural Resources Conservation Service (NRCS) - RUSLE2 Soil Loss Assessment Tool
• Environmental Protection Agency (EPA) - Better Assessment Science Integrating Point and Non-Point Sources (BASINS) 4.0
• Environmental Protection Agency (EPA) - List of models for streambank and erosion assessment
• USDA Forest Service (SRS) - DRAINMOD - GIS: a lumped parameter watershed scale drainage and water quality model
• USDA Forest Service (SRS) - Modeling erosion from forest roads with WEPP
  
  
  

Maps and Geographic Data

• Geostor 6.0 - Arkansas Official GeoData Clearinghouse 
  
• University of Arkansas Cooperative Extension Service - Geospatial Technologies
• Environmental Protection Agency (EPA) - WATERS Expert Query Tool
• Environmental Protection Agency (EPA) - Reach Address Database  
• Environmental Protection Agency (EPA) - EnviroMapper
  
• U.S. Dept. of Agriculture - Natural Resources Conservation Service (NRCS) - Soils Data
• National Oceanic & Atmospheric Administration (NOAA) - Weather Data  
• U.S. Geological Survey (USGS) - TerraServer (Aerial Photos)
• U.S. Geological Survey (USGS) - EarthExplorer (Satellite Images, Aerial Photos, etc)