Over the last twenty years, various solutions have been suggested to save Louisiana's coastal wetlands. Proposals have included unharnessing the Mississippi River; breaching the levees to allow river water to reach the wetlands; building giant levees along the entire coast; restoring the rapidly disintegrating barrier islands; filling the many canals that have been dredged through the marsh; or combinations of these alternatives. Thus far, however, most investigations have focused on specific impacts and responses, not on a comprehensive solution. No one has systematically synthesized the available information to determine what must be done to save 10, 25, or 50 percent of Louisiana's coastal ecosystem, or developed a comprehensive tool for such an analysis.
Although additional scientific research will be necessary, sufficient information is available to assess this question and commence the development of a plan for saving Louisiana's wetlands. The Louisiana Wetland Protection Panel was convened by the Louisiana Geological Survey and the U.S. Environmental Protection Agency to outline a study to evaluate strategies to substantially reduce wetland loss in coastal Louisiana through the end of the next century, for use in developing a comprehensive wetland protection plan.
This report provides an overview of the problem and outlines the analysis that must be synthesized to develop a plan, describing the causes of wetland loss, possible options to protect wetlands, and ongoing activities to address the problem, and laying out a study to evaluate comprehensive solutions to wetland loss in Louisiana.
Many federal, state, local, and private organizations will eventually have to address the loss of Louisiana's wetlands. We hope that this report accelerates the process by which these groups become part of the solution to the problem of wetland loss in coastal Louisiana.
Although natural processes are involved, human activities are responsible for the net loss of wetlands. These activities include levees, channelization, canals, draining and filling of land, and human modification of drainage patterns.
Wetland loss could be reduced by combinations of marsh restoration and management; Mississippi river diversion of freshwater, nutrients, and sediment; barrier island and beach stabilization; and modification of human activities.
A comprehensive plan of action is needed. Such a plan should have a reasonable chance of protecting a large fraction of Louisiana's wetlands through the next century. This document has outlined twenty options to be evaluated in the formation of such a plan.
A number of institutional impediments must be overcome before a consensus can be obtained on the design and implementation of a plan of action.
No single approach will adequately curtail wetland loss in Louisiana.
Initial formulation of an action plan should not await completion of additional scientific studies. Nevertheless, development of the plan will define additional research needs.
Ongoing and approved remedial measures should go forward on schedule. The need for a comprehensive plan of action does not imply that previously approved projects should be delayed.
If projections that the greenhouse effect will raise sea level one foot or more in the next fifty years are accurate, the need for immediate action is much greater than previously thought. The global warming has not so far been an important factor in causing wetland loss in Louisiana. However, long-term plans should consider the rise in sea level that could occur in the next fifty to one hundred years. The possibility that sea level may eventually rise one or more meters is not a reason to give up on efforts to protect coastal wetlands. It is another reason to implement measures to restore the delta's former ability to keep pace with subsidence and sea level rise through sedimentation and other processes.
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This document has been reviewed in accordance with the U.S. Environmental Protection Agency peer and administrative review policies and approved for publication. Mention of trade names or commercial products does not constitute endorsement or recommendation for use.