Journal cover Journal topic
Natural Hazards and Earth System Sciences An interactive open-access journal of the European Geosciences Union
Nat. Hazards Earth Syst. Sci., 17, 1493-1503, 2017
https://doi.org/10.5194/nhess-17-1493-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
12 Sep 2017
Rip current evidence by hydrodynamic simulations, bathymetric surveys and UAV observation
Guido Benassai1, Pietro Aucelli2, Giorgio Budillon2, Massimo De Stefano2, Diana Di Luccio2, Gianluigi Di Paola2, Raffaele Montella2, Luigi Mucerino3, Mario Sica4, and Micla Pennetta5 1Department of Engineering, Parthenope University of Naples, 80133, Naples, Italy
2Department of Science and Technology, Parthenope University of Naples, 80133, Naples, Italy
3Department of Earth, Environment and Life Sciences, University of Genova, 16126, Genova, Italy
4Autorità di Bacino Campania Centrale, 80138, Naples, Italy
5Department of Earth, Environment and Resources Sciences, University of Naples Federico II, 80138, Naples, Italy
Abstract. The prediction of the formation, spacing and location of rip currents is a scientific challenge that can be achieved by means of different complementary methods. In this paper the analysis of numerical and experimental data, including RPAS (remotely piloted aircraft systems) observations, allowed us to detect the presence of rip currents and rip channels at the mouth of Sele River, in the Gulf of Salerno, southern Italy. The dataset used to analyze these phenomena consisted of two different bathymetric surveys, a detailed sediment analysis and a set of high-resolution wave numerical simulations, completed with Google EarthTM images and RPAS observations. The grain size trend analysis and the numerical simulations allowed us to identify the rip current occurrence, forced by topographically constrained channels incised on the seabed, which were compared with observations.

Citation: Benassai, G., Aucelli, P., Budillon, G., De Stefano, M., Di Luccio, D., Di Paola, G., Montella, R., Mucerino, L., Sica, M., and Pennetta, M.: Rip current evidence by hydrodynamic simulations, bathymetric surveys and UAV observation, Nat. Hazards Earth Syst. Sci., 17, 1493-1503, https://doi.org/10.5194/nhess-17-1493-2017, 2017.
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Short summary
The study of the shallow coastal area of the Sele mouth in the Gulf of Salerno (southern Italy) identified the features of nearshore circulation, which often produced rip currents. The occurrence of a rip current cell circulation in restricted ranges of heights, periods and incident directions was related to the non-dimensional fall velocity parameter, which proved to be an efficient index for rip current formation.
The study of the shallow coastal area of the Sele mouth in the Gulf of Salerno (southern Italy)...
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