GIS Framework Supports Marsh Restoration Using Dredged Material in Coastal Mississippi

Dewberry has been selected to contribute to a coastal restoration effort led by the Mississippi Department of Environmental Quality (MDEQ), focused on rebuilding and enhancing marsh habitats across key coastal systems. The initiative targets areas within St. Louis Bay, Back Bay Biloxi, and the Escatawpa–Pascagoula region, using dredged material as a sustainable resource for habitat creation.
As part of the project team, Dewberry will design and implement a centralized geospatial database to support strategic decision-making. This GIS-based framework will identify potential marsh restoration sites, catalog available dredged materials, and integrate environmental and historical data relevant to shoreline dynamics. By combining spatial characteristics, shoreline change trends, and records of past dredging activity, the system will help planners prioritize locations where restoration efforts can most effectively mimic natural coastal processes.
The geospatial model is intended to serve as a planning and analysis tool rather than a static map. It will allow MDEQ to evaluate how restored marshes may respond to erosion, sediment movement, and long-term coastal change. In parallel, Dewberry will assist in defining standardized criteria for sourcing dredged material and selecting suitable marsh creation sites, helping ensure consistency and environmental responsibility across future projects.
The restoration effort is being led by Brown, Mitchell & Alexander, with additional contributions from South Coast Engineers and BMI Environmental Services. Together, the team aims to provide MDEQ with a data-driven foundation for targeted, resilient coastal restoration that maximizes the beneficial reuse of dredged material.















