thumbnail

Comparison of Computed Flow Through Manually Operated Water Control Structures in Florida Using Theoretical Versus Calibrated Coefficients

Open-File Report 2022-1011
By:  and 
https://doi.org/10.3133/ofr20221011

Links

Abstract

The U.S. Geological Survey (USGS) calculated discharge at 13 water control structures in Florida using theoretical equations and uncalibrated coefficients gathered from previous studies and typical textbook values for selected flow regimes and structure types. These discharges were compared to the real-time discharges calculated and published by the USGS from October 1, 2007, to September 30, 2019, using traditional methods and coefficients verified by direct discharge measurements. The theoretical and USGS-calculated daily mean discharges were compared at each structure for different flow regimes covering the entire range of discharges that occurred over the study period except those less than 10 cubic feet per second to avoid large percentage errors for small actual differences in discharge. The discharges were also not compared if (1) any alterations were made to the USGS discharge to account for factors such as debris or construction, (2) any values were missing throughout the day, (3) the flow regime changed during the day, or (4) the USGS discharge was estimated. The structures compared include a mixture of vertical lift and radial gates with free and submerged conditions for orifice and weir flow.

The study totals showed that the average absolute difference for all structures was 18.7 percent. Average percent differences ranged from −26.5 to 28.6 percent, and 4 of the 13 structures had average differences within 10 percent.

Suggested Citation

Ryan, P.J., and Hazelbaker, C.L., 2022, Comparison of computed flow through manually operated water control structures in Florida using theoretical versus calibrated coefficients: U.S. Geological Survey Open-File Report 2022–1011, 25 p., https://doi.org/10.3133/ofr20221011.

ISSN: 2331-1258 (online)

Study Area

Table of Contents

  • Acknowledgments
  • Abstract
  • Introduction
  • Methods
  • Results
  • Summary
  • References Cited
Publication type Report
Publication Subtype USGS Numbered Series
Title Comparison of computed flow through manually operated water control structures in Florida using theoretical versus calibrated coefficients
Series title Open-File Report
Series number 2022-1011
DOI 10.3133/ofr20221011
Year Published 2022
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) Caribbean-Florida Water Science Center
Description Report: vii, 25 p.; Data Release; Dataset
Country United States
State Florida
Online Only (Y/N) Y
Google Analytic Metrics Metrics page
Additional publication details