The Use of Continuous Water-Quality Time-Series Data to Compute Total Phosphorus Loadings for the Turkey River at Garber, Iowa, 2018–20

Scientific Investigations Report 2020-5131
Prepared in cooperation with the Iowa Department of Natural Resources
By:

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Abstract

In support of nutrient reduction efforts, total phosphorus loads and yields were computed for the Turkey River at Garber, Iowa (U.S. Geological Survey station 05412500), for January 1, 2018, to April 30, 2020, based on continuously monitored turbidity sensor data. Sample data were used to create a total phosphorus turbidity-surrogate model. Streamflow-based total phosphorus models were used during periods of missing sensor data to obtain a more complete annual total phosphorus load. This report presents methods needed to accurately compute site-specific loads and track annual progress toward nutrient reduction goals within the State.

Annual total phosphorus loads for the Turkey River at Garber, Iowa, were 1,740 and 1,490 U.S. short tons for 2018 and 2019, respectively, with annual yields ranging from 3.01 to 3.53 pounds per acre per year, compared to a mean statewide yield of 0.73 pound per acre per year needed to achieve the total phosphorus-reduction goal.

Suggested Citation

Garrett, J.D., 2021, The use of continuous water-quality time-series data to compute total phosphorus loadings for the Turkey River at Garber, Iowa, 2018–20: U.S. Geological Survey Scientific Investigations Report 2020–5131, 13 p., https://doi.org/10.3133/sir20205131.

ISSN: 2328-0328 (online)

Study Area

Table of Contents

  • Acknowledgments
  • Abstract
  • Introduction
  • Methods for Data Collection and Computation
  • Sample Water-Quality and Sensor Data
  • Continuous Water-Quality Time-Series Data to Compute Nutrient Loadings
  • Summary
  • References Cited
Publication type Report
Publication Subtype USGS Numbered Series
Title The use of continuous water-quality time-series data to compute total phosphorus loadings for the Turkey River at Garber, Iowa, 2018–20
Series title Scientific Investigations Report
Series number 2020-5131
DOI 10.3133/sir20205131
Year Published 2021
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Central Midwest Water Science Center
Description Report: vi, 13 p.; Data Release
Country United States
State Iowa
City Garber
Online Only (Y/N) Y
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