GEOL 1 Lecture Notes - Lecture 32: Beach Nourishment, Riprap, Longshore Drift
Document Summary
Beach, headland and cliff erosion are natural processes of dynamic coastal environments. Dramatic, rapid large-scale changes can occur during storms. Changes become hazards due to people locating themselves in high erosion. Large scale storm erosion will cause new breaches in barrier beaches. During storms, waves may wash over entire barrier beach. As sea levels rise, shorelines more upwards and landwards. Beach hardening may accelerate erosion in front of sea wall or rip-rap. Breakwater: structure built in front of shore, parallel to it. Groins: a series of structures projecting perpendicular to shoreline. Jetties: structures on one or both sides of an inlet, meant to keep inlet open. Pump sand onto beach from offshore bars. In 1982, ocean city nj spent million on beach nourishment. New material eroded away within 2 months. Beach had been nourished 22 times between 1952 and 1995. Shorelines respond dynamically to coastal waves, tides and currents.
