Abstract
The New Orleans Municipal Yacht Harbor (MYH) is located on the south shore of Lake Pontchartrain, 6 miles north of downtown New Orleans. The harbor was damaged during Hurricane Katrina in 2005, and recent city planning efforts have proposed reconstruction of the harbor interior. Moffatt & Nichol led the design, including the hydrodynamic study which established the marine design criteria. The site is exposed to high surge events which can inundate the harbor’s broad, low-crested earthen breakwater and allow waves to transmit directly into the interior.
Highlights
The New Orleans Municipal Yacht Harbor (MYH) is located on the south shore of Lake Pontchartrain, 6 miles north of downtown New Orleans
MYH WAVE EXPOSURE The site is well-protected during normal, operational conditions: it has a low mean tidal range (0.51-ft) over which the breakwater has adequate freeboard (3.2-ft at MHW); wave heights are small (Hs=2.7-ft at 1-year return-period); and the entrance channel is protected from the dominant wave direction
MODELING WAVE TRANSMISSION Extreme level event (50- to 100- yr return period) wave and surge conditions at a point 0.5 miles offshore of the MYH were taken from the USACE study developing design levee elevations for the New Orleans vicinity (US Army Corps of Engineers, 2014)
Summary
The New Orleans Municipal Yacht Harbor (MYH) is located on the south shore of Lake Pontchartrain, 6 miles north of downtown New Orleans. MYH WAVE EXPOSURE The site is well-protected during normal, operational conditions: it has a low mean tidal range (0.51-ft) over which the breakwater has adequate freeboard (3.2-ft at MHW); wave heights are small (Hs=2.7-ft at 1-year return-period); and the entrance channel is protected from the dominant wave direction. Operational waves propagate into the harbor through the entrance due to the combined effects of diffracted waves around the head of the breakwater and reflected waves from the stepped face of the Lakeshore Drive seawall .
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