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 - Shoreline Change and Shoreline Change Rates

• Introduction
• Shoreline Changes of Lake Maurepas
• Shoreline Change Rates of Lake Maurepas
• Shoreline Changes of Northern Lake Pontchartrain
• Shoreline Change Rates of Northern Lake Pontchartrain
• Shoreline Changes of Southern Lake Pontchartrain
• Shoreline Change Rates of Southern Lake Pontchartrain
• Shoreline Changes of Lake Borgne
• Shoreline Change Rates of Lake Borgne
• Shoreline Changes of the Northern Chandeleur Islands
• Gulfside Shoreline Change Rates of the Northern Chandeleur Islands
• Bayside Shoreline Rates Changes of the Northern Chandeleur Islands
• Shoreline Changes of the Southern Chandeleur Islands
• Gulfside Shoreline Change Rates of the Southern Chandeleur Islands
• Bayside Shoreline Change Rates of the Southern Chandeleur Islands

Figure 5: 1899 vs. 1995

Table 1: Shoreline Movement in Meters

Transect 1899-1995 Rate (m/yr) 1930-1995 Rate (m/yr) 1960-1995 Rate (m/yr) 1 -45 -0.5 -71 -1.1 -22 -0.6 2 -59 -0.6 -104 -1.6 -8 -0.2 3 -111 -1.2 -75 -1.2 -64 -1.8 4 -121 -1.3 -164 -2.5 -73 -2.1 5 -65 -0.7 -34 -0.5 -28 -0.8 6 -270 -2.8 -158 -2.4 -114 -3.3 7 -31 -0.3 -50 -0.8 -7 -0.2 8 3 0.0 13 0.2 56 1.6 9 -26 -0.3 26 0.4 37 1.1 10 -21 -0.2 133 2.0 6 0.2 11 -134 -1.4 -21 -0.3 -25 -0.7 12 -99 -1.0 85 1.3 -18 -0.5 13 -30 -0.3 12 0.2 -8 -0.2 14 -81 -0.8 51 0.8 -7 -0.2 15 -131 -1.4 -47 -0.7 0 0.0 16 -216 -2.3 -107 -1.6 -102 -2.9 17 -164 -1.7 -18 -0.3 -61 -1.7 18 -66 -0.7 -86 -1.3 -40 -1.1 19 -97 -1.0 -51 -0.8 -19 -0.5 20 -33 -0.3 -58 -0.9 -40 -1.1 21 -181 -1.9 -114 -1.8 -49 -1.4 22 -68 -0.7 -26 -0.4 -23 -0.7

Table1: Measured change of shoreline position (m) along Lake Maurepas for three time intervals and the corresponding shoreline movement rate (m/yr) for each transect.

Table 2: Average Shoreline Movement in (m/yr) for Lake Maurepas.

1899-1995 -0.96 1930-1995 -0.60 1960-1995 -0.79