The understanding of the beach capability to resist and recover from a disturbance is of paramount importance in coastal engineering. However, few efforts have been devoted to quantifying beach resilience. The present work aims to investigate the shoreline resistance and resilience, associated to a transient disturbance, on a sandy beach. A temporary groin was deployed for 24 h on a micro-tidal sea-breeze dominated beach to induce a shoreline perturbation. Morphological changes were measured by means of beach surveys to estimate the beach perturbation and the further beach recovery after structure removal. An Empirical Orthogonal Function (EOF) analysis of the shoreline position suggests that the first EOF mode describes the spatial-temporal evolution of the shoreline owing to the groin deployment/removal. A new one-line numerical model of beach evolution is calibrated with the field surveys, reproducing both the sediment impoundment and subsequent beach recovery after the structure removal. Thus, a parametric numerical study is conducted to quantify resistance and resilience. Numerical results suggest that beach resistance associated to the presence of a structure decreases with increasing alongshore sediment transport potential, whereas resilience after structure removal is positively correlated with the alongshore diffusivity.
Abstract. Although the seismic information from the subsoil is very important, in some areas of the world this is not available due to various factors, the main one being a seismically low area. It is important to say that the planet has been changing and many intraplate earthquakes have occurred in places never expected, spreading seismic waves to places where they were considered low seismicity. For example, on September 8, 2017 in Ciudad del Carmen, 500 km from the epicenter, the earthquake was felt causing damage to the facades of the buildings. Therefore, it is important to have the subsoil shear-waves velocities to subsequently generate a good analysis and structural seismic design. For this reason, in this study under the seismic approach an assessment of Ciudad del Carmen Campeche subsoil is presented. Active and passive Multichannel Analysis of Surface Waves and Refraction Microtremor technique to investigate seismically subsoil characteristics have been employed. Shear wave velocities were obtained up to a depth of 30 m with magnitudes of 172.45 m/s to 353.90 m/s. Based on the Vs30 values, the subsoil is seismically classified into D and E according to the criterion of the National Earthquake Hazards Reduction Program and International Building Code, turning out to be very vulnerable to high damage during the earthquake shaking. Furthermore, Ciudad del Carmen was regionalized into three types, where type I being a dense soil or averagely soft rock with Vs30 greater than 360 m/s, type II when the soil has an intermediate dynamic amplifications with Vs30 between 180 to 360 m/s, and type III correspond to a soil with large dynamic amplifications and Vs30 less than 180 m/s.
The Regulating Plan of Campeche in 1952, constituted one of the first formal projects of rules and regulations for the city, whose principals were based on sustainability and modern urbanism. Through the same, three fundamental points were developed: a) zoning of the areas according to their use, b) regeneration of housing areas and c) structuring of a road communication system. Over time, the historic center of the city and in particular the Circuito Baluartes avenue, have presented a series of constant changes in its road infrastructure due to the increased vehicular and demographic flow of the population that affects the tourist influx in the city that It has the denomination of Cultural Patrimony of the Humanity granted by the UNESCO. Based on the above,the reorganization of the circulation is proposed, through the relocation of pedestrian crossings, the diagnosis of signage and pavement, as well as the construction of a public parking lot that helps to decongest local traffic and allows tourism to access greater ease to the bulwark. To formulate the diagnosis and the subsequent proposal of parking in the road environment, a methodology was developed that considered a detailed inspection of the area under study in a visual manner, accompanied by photographs of existing problems to support the approach, obtaining a more analytical description. In this way, different proposals of the area under study were obtained and analyzed, which allowed choosing the most viable option that would be adapted to the current needs of the area without affecting the existing landscape architecture and adhering to the norms and laws in force
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.