scholarly journals Correction to: Rip current hazard assessment on a sandy beach in Liguria, NW Mediterranean

2020 ◽  
Vol 105 (1) ◽  
pp. 157-157
Author(s):  
Luigi Mucerino ◽  
Luca Carpi ◽  
Chiara F. Schiafno ◽  
Enzo Pranzini ◽  
Eleonora Sessa ◽  
...  
Keyword(s):  
Hazard Assessment ◽  
Sandy Beach ◽  
Rip Current ◽  
Nw Mediterranean

scholarly journals Rip current hazard assessment on a sandy beach in Liguria, NW Mediterranean

2020 ◽  
Vol 105 (1) ◽  
pp. 137-156
Author(s):  
Luigi Mucerino ◽  
Luca Carpi ◽  
Chiara F. Schiaffino ◽  
Enzo Pranzini ◽  
Eleonora Sessa ◽  
...  
Keyword(s):  
Probability Theory ◽  
Hazard Assessment ◽  
Rip Current ◽  
Rip Currents ◽  
Water Safety ◽  
Nw Mediterranean ◽  
Hazard And Risk ◽  
Nw Italy ◽  
Hazard Level ◽  
Ligurian Coast

AbstractRip currents are one of the most significant environmental hazards for beachgoers and are of interest to coastal scientists. Several studies have been conducted to understand rip current dynamics, and several approaches for rip hazard assessment have been proposed. In general, the purpose is to provide knowledge and tools to support authorities and lifeguards in rip current risk prevention. This study proposes the application of an expeditious methodology to evaluate rip current hazard and risk, based on probability theory. The tested area was located along the Alassio beach, a renowned tourist destination located on the western Ligurian coast (NW Italy). A coastal video-monitoring system was used for rip currents individuation, whereas wave data were collected thanks to an oceanographic buoy managed by Regione Liguria. In detail, a yearly analysis was performed to identify the correspondence between rip currents and wave parameters data. The results showed that rip currents occur, in the study area, under moderate wave conditions ($$0.5 \le H_s \le 1.34$$ 0.5 ≤ H s ≤ 1.34  m; $$4.7\le T_m \le 7.0$$ 4.7 ≤ T m ≤ 7.0  s; $$150^{\circ }\,\hbox {N} \le \theta _m \le 227^{\circ }$$ 150 ∘ N ≤ θ m ≤ 227 ∘ N). Based on this analysis, an easy application of the probability theory was applied to evaluate the level of hazard. Moreover, considering the official tourist data, we also perform an expeditious rip currents risk evaluation. The results showed that the hazard level is considered high at annual time scale and moderate during the tourist season; the risk is related to seasonal presences. The study can propose a tool to support authorities and lifeguards in water safety planning and management.

scholarly journals FIELD MEASUREMENTS OF BEDFORMS IN A RIP CHANNEL ON A MACRO-TIDAL BEACH

2012 ◽  
Vol 1 (33) ◽  
pp. 93
Author(s):  
Antony Thorpe ◽  
Jon Miles ◽  
Gerd Masselink ◽  
Paul Russell ◽  
Tim Scott ◽  
...  
Keyword(s):  
Sandy Beach ◽  
High Tide ◽  
Field Measurements ◽  
Rip Current ◽  
Peak Period ◽  
Migration Rates ◽  
Sand Ripple ◽  
Current Maximum ◽  
Offshore Flow ◽  
And Migration

A Sand Ripple Profiler (SRP) was deployed in a rip channel on a dissipative sandy beach to measure bedform height (∆), length (λ) and migration rate (Mr¬) throughout a macro-tidal cycle with an offshore significant wave height of 0.7 m and peak period of 10 s. At lower tidal elevations in the strong offshore flow of the rip current (maximum = 0.4 m/s) bedforms (∆ = 0.15 m, λ = 3 m) were found to migrate offshore (Mr = 0.21 m/hr). Outside of active rip current conditions (water depth (h) = >~2.5 m) bedforms were found to be of smaller scale (∆ = 0.09 – 0.12 m, λ = 1 – 1.2 m) migrating onshore at a rate of 0.35 m/hr at mid tide (h = 3.3 m) and 0.03 m/hr at high tide (h = 6.3 m). Onshore migration rates were found to increase with increased wave skewness and velocity variance.

STUDY ON GRASP OF CURRENT CONDITION OF THE RIP CURRENT TO OCCUR IN SANDY BEACH

2018 ◽  
Vol 74 (2) ◽  
pp. I_1411-I_1416
Author(s):  
Naoyuki INUKAI ◽  
Akifumi YAMASHITA ◽  
Hiroshi YAMAMOTO
Keyword(s):  
Sandy Beach ◽  
Rip Current

scholarly journals APPLYING UAV AND PHOTOGRAMMETRY TO MONITOR THE MORPHOLOGICAL CHANGES ALONG THE BEACH IN PENGHU ISLANDS

2016 ◽  
Vol XLI-B8 ◽  
pp. 1153-1156
Author(s):  
Cheng-Hao Lu
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Sandy Beach ◽  
Temporal Change ◽  
Morphological Changes ◽  
Rip Current ◽  
Shield Volcano ◽  
Coastal Structures ◽  
Aerial Vehicles ◽  
Southern Taiwan ◽  
Penghu Islands

Penghu islands, in the southern Taiwan Strait, is a remnant of a middle-late Miocene basaltic shield volcano. We present a procedure to use UAV (Unmanned Aerial Vehicles) to perform photogrammetry survey and monitoring analysis in beach evolution scenarios. The aim of this study is to understand spatial-temporal change along the sandy beach in Penghu islands, especially as for the effects of typhoon and coastal structures. According to the study result, this example of application is provided to show the results and the potential of this methodology in real beach changes. In addition, we found the typhoon and coastal structures play important roles to shape the beach morphology and its evolution. The result of beach monitoring reveals that the reduction and change of sand volume in Shanshui beach resulted from the placement of detached breakwater complexes. This coastal structure likely resulted in the development of tombolo and therefor make the beach unstable and subject to conduct rip current and more erosion.

scholarly journals Storm-induced coastal hazard assessment at regional scale: application to Catalonia (NW Mediterranean)

2010 ◽  
Vol 26 ◽  
pp. 83-87 ◽  
Author(s):  
E. Bosom ◽  
J. A. Jiménez
Keyword(s):  
Time Series ◽  
Hazard Assessment ◽  
Probability Distributions ◽  
Regional Scale ◽  
Wave Climate ◽  
Coastal Hazard ◽  
Sediment Grain Size ◽  
Hazardous Area ◽  
Nw Mediterranean ◽  
Local Wave

Abstract. A methodology for coastal hazard assessment at regional scale is presented and applied to the Catalan coast (NW Mediterranean). The method separately evaluates erosion and inundation hazards by using wave time series and beach characteristics (slope and sediment grain size). Obtained hazard time series are fitted to extreme probability distributions for different coastal sectors which are defined in function of local wave climate. This approach allows to compare the spatial variation of hazard intensities for a given probability of occurrence and, thus, to objectively identify the most hazardous areas along the coast in terms of erosion and inundation. Obtained results indicate that the coast north of Barcelona is more hazardous than the southern coast regarding inundation for any given probability. With respect to storm-induced erosion, the central coast of Catalonia is the less hazardous area, although spatial variations in erosion along the coast are smaller than the observed for inundation.

STUDY ON CURRENT CONDITION OF RIP CURRENT IN SANDY BEACH

2018 ◽  
Vol 74 (5) ◽  
pp. I_589-I_594
Author(s):  
Naoyuki INUKAI ◽  
Akefumi YAMASHITA ◽  
Hiroshi YAMAMOTO
Keyword(s):  
Sandy Beach ◽  
Rip Current

scholarly journals APPLYING UAV AND PHOTOGRAMMETRY TO MONITOR THE MORPHOLOGICAL CHANGES ALONG THE BEACH IN PENGHU ISLANDS

2016 ◽  
Vol XLI-B8 ◽  
pp. 1153-1156 ◽  
Author(s):  
Cheng-Hao Lu
Keyword(s):  
Unmanned Aerial Vehicles ◽  
Sandy Beach ◽  
Temporal Change ◽  
Morphological Changes ◽  
Rip Current ◽  
Shield Volcano ◽  
Coastal Structures ◽  
Aerial Vehicles ◽  
Southern Taiwan ◽  
Penghu Islands

Penghu islands, in the southern Taiwan Strait, is a remnant of a middle-late Miocene basaltic shield volcano. We present a procedure to use UAV (Unmanned Aerial Vehicles) to perform photogrammetry survey and monitoring analysis in beach evolution scenarios. The aim of this study is to understand spatial-temporal change along the sandy beach in Penghu islands, especially as for the effects of typhoon and coastal structures. According to the study result, this example of application is provided to show the results and the potential of this methodology in real beach changes. In addition, we found the typhoon and coastal structures play important roles to shape the beach morphology and its evolution. The result of beach monitoring reveals that the reduction and change of sand volume in Shanshui beach resulted from the placement of detached breakwater complexes. This coastal structure likely resulted in the development of tombolo and therefor make the beach unstable and subject to conduct rip current and more erosion.

scholarly journals Nilai Bahaya Rip Current untuk Wisata Pantai di Pantai Pangandaran, Jawa Barat

2021 ◽  
Vol 10 (3) ◽  
pp. 213-222
Author(s):  
Vira Annisa Rachma ◽  
Ankiq Taofiqurohman ◽  
Sri Astuty ◽  
Wahyuniar Pamungkas
Keyword(s):  
Wave Height ◽  
Hazard Assessment ◽  
Quantitative Method ◽  
Rip Current ◽  
Fall Velocity ◽  
Important Thing ◽  
Tourism Management ◽  
Processing Data ◽  
The World ◽  
Safety Period

Keselamatan para wisatawan adalah hal yang paling penting dalam mengelola kawasan wisata. Rip current merupakan bahaya yang signifikan bagi para pengunjung pantai dan telah memakan banyak korban di seluruh dunia. Riset ini dilakukan dengan tujuan untuk mendapatkan nilai bahaya Rip Current serta mengidentifikasi waktu yang aman untuk wisata di Pantai Pangandaran, Jawa Barat. Pelaksanaan riset berlangsung dari bulan Januari – Mei 2020. Metode riset yang digunakan adalah metode kuantitatif. Pengolahan data dan penilaian bahaya rip current berdasarkan Rip Current Hazard Assessment Guide (RNLI-UK). Parameter yang digunakan dalam riset ini adalah tinggi dan periode gelombang pecah, kecepatan jatuh sedimen, dan nilai tunggang pasut. Hasil riset menunjukan bahwa nilai bahaya rip current di Kawasan Wisata Pantai Barat Pangandaran, Jawa Barat sebesar 3 sampai dengan 4; yang dikategorikan ke dalam tingkat berbahaya sampai tingkat sangat berbahaya dengan faktor yang paling mempengaruhi adalah tinggi gelombang. Nilai bahaya rip current tertinggi (sangat berbahaya) berada di Bulan Juni hingga Oktober. Waktu yang dinilai relatif lebih aman untuk wisata berdasarkan hasil assesment nilai bahaya rip current adalah pada Bulan Januari, Februari, Maret, April, Mei, November serta Desember.The safety of tourists is the most important thing in tourism management. Rip current is a significant danger for beach visitors and has many casualties around the world. This research aims to get an index of Rip Current and identify the safety period for tourism in Pangandaran Beach. This research was conducted from January – May 2020. Methods of this research were using quantitative method. Processing data and getting an index for hazardous of Rip Current based on the Rip Current Hazard Assesment Guide (RNLI-UK). The parameters used in this research are height and period of the breaker wave, sediment fall velocity, and tide range. The result of this research are shown as an index of rip current’s hazardous 3 to 4; whereas 3 means hazardous and 4 as categorized very hazardous with the wave height as the most affecting factor. The safety periods for tourism based on the results of an index for hazardous occurs in January, February, March, April, May, November, and December.  

Hazard assessment of a complex landslide: the case of Vestea (Abruzzo, Italy)

2016 ◽  
Vol 41 ◽  
pp. 112-115
Author(s):  
>Domenico >Aringoli ◽  
Mattia Ippolito ◽  
Nicola Sciarra ◽  
Bernardino Gentili ◽  
Marco Materazzi ◽  
...  
Keyword(s):  
Hazard Assessment ◽  
Complex Landslide
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