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Chandeleur Islands to Breton Island Bathymetric and Topographic Datasets and Operational Sediment Budget Development: Methodology and Analysis Report

Open-File Report 2022-1020
Louisiana Barrier Island Comprehensive Monitoring Program 2015–2020
Prepared in cooperation with the Coastal Protection and Restoration Authority of Louisiana
By: , , and 
https://doi.org/10.3133/ofr20221020

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Abstract

This study is part of the Coastal Protection and Restoration Authority (CPRA) Louisiana Barrier Island Comprehensive Monitoring (BICM) program. The goal of the BICM program is to provide long-term data on the barrier islands of Louisiana for monitoring change and assisting in coastal management. The BICM program uses historical data and acquires new data to map and monitor shoreline position, sediment properties, topography, bathymetry, and habitat. Since 2006, the U.S. Geological Survey (USGS) has collected geophysical and sedimentologic data across the Breton National Wildlife Refuge (BNWR) through the BICM program and collaborative USGS projects such as the Barrier Island Evolution Research project (under CPRA contract number 2000339324, BICM2–Chandeleurs TopoBathy DEM), which builds upon the previous BICM physical assessment of the BNWR outlined in a separate report. This project uses topographic and bathymetric data from three periods (1917–1922, 2006–2007, and 2013–2015) to develop digital elevation models (DEMs), measure elevation change, and calculate sediment budgets for the barrier island system. The sediment budget analysis, derived from the volumetric change between the three periods, is necessary for understanding sediment transport dynamics along barrier islands and providing information for effective coastal management. This report describes the methods used to acquire, process, and produce these products.

Suggested Citation

Flocks, J.G., Forde, A.S., and Bernier, J.C., 2022, Chandeleur Islands to Breton Island bathymetric and topographic datasets and operational sediment budget development—Methodology and analysis report: U.S. Geological Survey Open-File Report 2022–1020, 48 p., https://doi.org/10.3133/ofr20221020.

ISSN: 2331-1258 (online)

Study Area

Table of Contents

  • Acknowledgments
  • Introduction
  • Data Sources
  • Deriving the Digital Elevation Models, Raster Map, and Contour Map
  • Elevation and Volumetric Change Analyses
  • Error Analysis
  • Sediment Budget Calculation
  • Final Sediment-Budget
  • Summary
  • References Cited
  • Appendix 1. Barrier Island Comprehensive Monitoring Program Products
Publication type Report
Publication Subtype USGS Numbered Series
Title Chandeleur Islands to Breton Island bathymetric and topographic datasets and operational sediment budget development: Methodology and analysis report
Series title Open-File Report
Series number 2022-1020
DOI 10.3133/ofr20221020
Year Published 2022
Language English
Publisher U.S. Geological Survey
Publisher location Reston, VA
Contributing office(s) St. Petersburg Coastal and Marine Science Center
Description ix, 48 p.
Country United States
State Louisiana
Other Geospatial Breton Island, Breton National Wildlife Refuge, Chandeleur Islands, Curlew Shoals, Grand Gosier Shoals, Gulf of Mexico
Online Only (Y/N) Y
Additional Online Files (Y/N) N
Google Analytic Metrics Metrics page
Additional publication details