Observations and Preliminary Vulnerability Assessment of a Hybrid Dune-Based Living Shoreline
| Autor: | Timu W. Gallien, Maria A. Winters, Evyan Borgnis Sloane, Brian Leslie |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
coastal protection
010504 meteorology & atmospheric sciences UAV berm living shoreline Ocean Engineering Mass wasting 01 natural sciences dune hybrid dune overtopping lcsh:Oceanography lcsh:VM1-989 Vulnerability assessment Hindcast lcsh:GC1-1581 Coastal flood nature-based infrastructure beach erosion 0105 earth and related environmental sciences Water Science and Technology Civil and Structural Engineering Shore geography geography.geographical_feature_category engineered dune Berm 010505 oceanography lcsh:Naval architecture. Shipbuilding. Marine engineering coastal flooding sea-level rise Coastal erosion Environmental science Physical geography cobble Swash |
| Zdroj: | Journal of Marine Science and Engineering, Vol 8, Iss 920, p 920 (2020) Journal of Marine Science and Engineering Volume 8 Issue 11 |
| ISSN: | 2077-1312 |
| DOI: | 10.3390/jmse8110920 |
| Popis: | 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 for future morphodynamic modeling efforts. Six post-construction surveys were conducted to observe seasonal and storm-by-storm dune 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. |
| Databáze: | OpenAIRE |
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