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Methods for Computing Water-Quality Concentrations and Loads at Sites Operated by the U.S. Geological Survey Kansas Water Science Center

Open-File Report 2024-1049
By: , , , , , and 
https://doi.org/10.3133/ofr20241049

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Abstract

The U.S. Geological Survey (USGS) Kansas Water Science Center (KSWSC) has published time-series computations of water-quality concentrations and loads based on in situ sensor data since 1995. Water-quality constituent concentrations or densities are computed using regression models that relate in situ sensor values to laboratory analyses of periodically collected samples. These regression models currently (2024) follow no uniform published guidance and are individually documented through USGS reports. This report describes updated (2024) procedures designed to improve the consistency, quality, and timeliness of computed continuous water-quality data produced by the USGS KSWSC. Beginning in 2024, models developed by the USGS KSWSC that follow specific procedures and requirements related to sample collection, model fit, and model documentation outlined in this report are planned to be published and stored in the USGS National Real-Time Water Quality Data for the Nation Data Service. This report also describes USGS KSWSC procedures for evaluating and publishing time-series water-quality computations after initial model development and documentation. This guidance can be used to improve USGS KSWSC model development and data computation consistency and streamline the time-series water-quality computation process from model development to publication.

Suggested Citation

Stone, M.L., Lee, C.J., Rasmussen, T.J., Williams, T.J., Kramer, A.R., and Klager, B.J., 2024, Methods for computing water-quality concentrations and loads at sites operated by the U.S. Geological Survey Kansas Water Science Center: U.S. Geological Survey Open-File Report 2024–1049, 10 p., https://doi.org/10.3133/ofr20241049.

ISSN: 2331-1258 (online)

Table of Contents

  • Abstract
  • Introduction
  • Procedures for Publishing Continuous Water-Quality Data in the U.S. Geological Survey Kansas Water Science Center
  • Summary
  • References Cited
  • Appendix 1. Model Archive Summary Example—Ordinary Least Squares
  • Appendix 2. Model Archive Summary Example—Tobit
Publication type Report
Publication Subtype USGS Numbered Series
Title Methods for computing water-quality concentrations and loads at sites operated by the U.S. Geological Survey Kansas Water Science Center
Series title Open-File Report
Series number 2024-1049
DOI 10.3133/ofr20241049
Year Published 2024
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Kansas Water Science Center
Description Report: iii, 10 p.; 2 Appendixes
Online Only (Y/N) Y
Additional Online Files (Y/N) Y
Google Analytic Metrics Metrics page
Additional publication details