Observations and Preliminary Vulnerability Assessment of a Hybrid Dune-Based Living Shoreline

Observations and Preliminary Vulnerability Assessment of a Hybrid Dune-Based Living Shoreline

Blog Article

A novel hybrid (e.g., vegetation, sand, cobble, rip-rap) nature-based dune structure was constructed at Cardiff State Beach in Encinitas, California, to protect a critical transportation artery from undermining and frequent flooding.

A collaboration between regulators, funders, state agencies, professional practice and academia developed a high resolution robust unmanned aerial vehicle (UAV) based monitoring strategy to observe dune construction and evolution.Fifteen construction surveys were conducted to observe each substrate element 5 HTP for future morphodynamic modeling efforts.Six post-construction surveys were conducted to observe seasonal and storm-by-storm dune Body Wash evolution.

Backshore vulnerability was assessed using a sixty-one year time series of tides and hindcast wave forcing fit to a general extreme value distribution.The dune crest is above calculated 100-year water levels; however, the dune remains vulnerable to mass wasting caused by swash interaction at the toe of the dune.Sea-level rise will substantially increase the probability of dune erosion, breaching, and overtopping.