Concentrations and annual fluxes for selected water-quality constituents from the USGS National Stream Quality Accounting Network (NASQAN), 1996-2000

By Valerie J. Kelly, Richard P. Hooper, Brent T. Aulenbach, and Mary Janet

Contents

Abstract

Introduction

Site Map

Program Description

• Station Network
• Sampling Strategy
• Constituents

Methods of Analysis

• Sample Collection and Laboratory Analysis
• Quality Assurance Program
• Flux Calculation
• Yield Calculation

Results

• Download instructions
• Quality-assurance results
• Hydrographs with sampling coverage
• Streamflow data
• Water-quality data
• Statistical summaries
• Percent detection maps
• Average loads and model parameters
• Yield maps
• Bubble diagrams of flow-weighted average concentrations
• Annual flux tables

References

List of Figures and Tables