University:
Boston University
Course:
CAS EE 144 | Introduction to Oceanography
Academic year:

2022
Views:

495

Pages:

18
Author:

vratitiea8k

Damage in New Orleans - IPET Damage in New Orleans - IPET Physical & Numerical Models Damage in New Orleans • Failures in the some of the canals occurred well before the water level reached the top of the wall • Observations and simulations indicate that waves near the failures were very small ~0.3-0.5m – Walls should not have failed • Study showed that failures were geotechnical based Porous or weak underlying soils allowed for gaps to be created between the panels Damage in New Orleans- IPET • Failures on the eastern levees were numerous • Surge ~14-18’, design elevation of the levees was 17.5’ – In addition, serious subsidence in this area, some levees were only 12.5’ before Katrina Damage in New Orleans- IPET • Failures on the eastern levees were numerous • Surge ~14-18’, design elevation of the levees was 17.5’ – In addition, serious subsidence in this area, some levees were only 12.5’ before Katrina “Magic Number” for levee failure ~0.1 ft3/s/ft (0.01 m3/s/m) This value taken from detailed hydrodynamic simulations, and appears to have a high correlation with damaged levees Damage in New Orleans- IPET • Failures on the eastern levees were numerous • Surge ~14-18’, design elevation of the levees was 17.5’ – In addition, serious subsidence in this area, some levees were only 12.5’ before Katrina Damage in New Orleans- IPET Hurricane Sandy • Max sustained winds 110 mph (175 km/h) • Made landfall in southern New Jersey with winds of 80 mph (130 km/h) • Max storm surge was 13-16 ft (4-5 m) • Surge in New York City ~14’ (4.2m) occurring within 30 minutes of high (Spring) tide • Waves offshore of NYC ~30’ (9 m) Hurricane Sandy • Max sustained winds 110 mph (175 km/h) • Made landfall in southern New Jersey with winds of 80 mph (130 km/h) • Max storm surge was 13-16 ft (4-5 m) • Max water level in New York City ~14’ (4.2m) occurring within 30 minutes of high (Spring) tide • Waves offshore of NYC ~30’ (9 m) Hurricane Sandy -Damage in New Jersey Hurricane Sandy -Damage in New Jersey Hurricane Sandy -Damage in New Jersey 4.8 m Quality Piles! Hurricane Sandy -Damage in New Jersey Hurricane Sandy -Damage in New Jersey Hurricane Sandy -Damage in New Jersey Hurricane Sandy -Damage in New Jersey Stone seawall was built in 1896, buried in sand by wind and beach nourishment projects through 1960’s. Most residents did not know it existed! Hurricane Sandy -Damage in New Jersey Hurricane Sandy -Damage in New Jersey