Environmental Atlas of the Lake Pontchartrain Basin

	Environmental Issues: Coastal Land Loss | Shoreline Change and Rates | Urbanization | Aggregate Dredge Holes | Dredge Pit Characterization | Bonnet Carré Diversion | Water Quality | Sediment Quality & Dispersal

Environmental Issues - Coastal Land Loss

• Pontchartrain Basin Land Loss - Description
• Existing and Predicted Land Loss Trends 1956-2050
• Pontchartrain Basin Land Loss - Morphology Classification
• Pontchartrain Basin Land Loss - Process Classification

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Existing and Predicted Land Loss Trends 1956-2050

Coastal Louisiana Land Loss Summary Description Time Period Mi2 Km2 Historic Loss 1956 - 1990 1286 3333 Coastal Land Lost Under Status Quo* 1993 - 2050 990 2564 Coastal Land Saved with Coast 2050 1993 - 2050 660 1709 * CWPPRA Projects including Caernarvon and Davis Pond diversions Produced by the Louisiana Dept. of Natural Resources, Coastal Restoration Division and USGS National Wetlands Research Center, Coastal Restoration Field Station Data Sources: USGS National Wetlands Research Center: 1956 - 1990 Land loss data Base map derived from 1993 GAP land cover data 1993 - 2050 with action predicted loss Compiled for Coast 2050 by the Louisiana State University, Natural Systems Engineering Lab and U.S. Army Corps of Engineers, New Orleans District Map-ID 2000-4-317 Map Date: 4/28/2000

Figure 1: Historical and Predicted land loss and gains for two Coast 2050 regions in south-east Louisiana. Click on the map for a larger version.