Ing the challenge of DFHBI manufacturer coastal modification and its impacts on the shoreline classification and position on Bora Bora from 1955 to 2019 through an original long-term and very high-resolution method. This study adds for the increasing awareness with the vulnerability of shorelines as a consequence of urbanisation and its effects in French Polynesia (e.g., [3]). two. Supplies and Approaches 2.1. Study Web site 2.1.1. Physical Setting Bora Bora (16 29 S, 151 44 W, highest summit: 727 m) is often a 20 km2 tropical volcanic island circled by a 70 km2 barrier reef, inside the Society archipelago of French Polynesia inside the South Pacific (Figure 1). It has an around 40 km complex coastline forming several bays and peninsulas which are bordered by 50 to 150 m-wide fringing reefs [8]. There are many motu (sandy islands) around the reef margin around the island which hinder water circulation in and out on the lagoon at the same time as constrain sediment transport from the barrier reef crest and from lagoonal sand accumulations to the island [10]. You can find a handful of shallow channels (hoa) by means of which oceanic water enters the lagoon. A 48 m deep pass connects the lagoon towards the ocean for the west from the island [10]. The Y-27632 Autophagy general water circulation inside the lagoon is south to north [8] but is determined by tides (spring tidal variety: 0.four m [11]), wind circumstances, and temperature-related water column stratification [12]. The only available wave height information for Bora Bora is determined by a record from a sensor positioned outside the lagoon near Bora Bora’s only pass on the western side of your island [13]. The primary island is sheltered from the waves by the barrier reef and it is, hence, tough to estimate its wave climate at the same time as the variability around the island; outside with the lagoon, the key wave direction is East to West, parallel to the trade wind path [13].Remote Sens. 2021, 13,from the breakdown of skeletal fragments from reef organisms [10]; a fraction of sediments are contemporary cemented non-skeletal grains for example ooids that arise from the precipitation of calcium carbonate around the shallow areas between the motu and the lagoon where currents are weak and enable for carbonate super-saturation [10]. The absence of sustained riverine input of sediments (no permanent rivers on Bora three of Bora aside from a stream within the north-western Faanui bay) results in a largely carbonate 18 sedimentology with few siliciclastic components (mostly clay) derived from the volcanic island [10].Figure 1. Geographical location of Bora Bora in French Polynesia and satellite imagery of Bora Bora (image from 20 July Figure 1. Geographical place of Bora Bora in French Polynesia and satellite imagery of Bora Bora (image from 20 July 2019) highlighting the key topological places discussed inside the article. The white rectangle on the image of Bora Bora 2019) highlighting the principle topological locations discussed within the Letters A indicate the location of your coastal habitats above Vaitape corresponds to the place with the images of Figure 2. report. The white rectangle on the image of Bora Bora above VaitapeFigure three. Imagery from CNES/Airbus 2019 and Google Earth 2021. indicate the location on the coastal habitats featured in corresponds for the location of your images of Figure 2. Letters A featured in Figure 3. Imagery from CNES/Airbus 2019 and Google Earth 2021.2.1.two. Human Presence is characterised by a majority of medium to coarse sediments in the Bora Bora’s lagoon Bora Bora’s very first barrier reef (more than 98 in the total frac.
