Efectos del cambio climático en la costa de América Latina y el Caribe: vulnerabilidad y exposición

Incluye bibliografía

Efectos del cambio climático en la costa de América Latina y el Caribe: efectos teóricos

Incluye bibliografía

Efectos del cambio climático en la costa de América Latina y el Caribe: impactos

Incluye bibliografía

Efectos del cambio climático en la costa de América Latina y el Caribe: riesgos

Incluye bibliografía

El desafío de la sostenibilidad ambiental en América Latina y el Caribe. Textos seleccionados 2012-2014

Prólogo de Alicia Bárcena.

The effects of climate change in the coastal areas of Latin America and the Caribbean. Impacts

The regionwide study of the effects of climate change in the coastal areas of Latin America and the Caribbean has been divided into four main parts in line with the comprehensive risk-assessment methodology that was developed as research progressed. The outputs of this regional study are presented in four core documents: an analysis of the factors that are driving climate change, a study on the vulnerability of coastal areas, an evaluation of the impacts of climate change and an exploration of how all these different factors can be brought together in an assessment of the risks associated with some of the impacts of climate change on the region’s coastal areas.

Efectos del cambio climático en la costa de América Latina y el Caribe: dinámicas, tendencias y variabilidad climática

Incluye bibliografía

Planejamento e zoneamento ambiental da bacia hidrográfica do manancial Balneário da Amizade nos municípios de Álvares Machado e Presidente Prudente - São Paulo/Brasil

Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)

HYDRODYNAMICS AND SUSPENDED SEDIMENT TRANSPORT IN THE CAMBORIU ESTUARY - BRAZIL: PRE JETTY CONDITIONS

Estuarine hydrodynamics is a key factor in the definition of the filtering capacity of an estuary and results from the interaction of the processes that control the inlet morphodynamics and those that are acting in the mixing of the water in the estuary. The hydrodynamics and suspended sediment transport in the Cambori estuary were assessed by two field campaigns conducted in 1998 that covered both neap and spring tide conditions. The period measured represents the estuarine hydrodynamics and sediment transport prior to the construction of the jetty in 2003 and provides important background information for the Cambori estuary. Each field campaign covered two complete tidal cycles with hourly measurements of currents, salinity, suspended sediment concentration and water level. Results show that the Cambori estuary is partially mixed with the vertical structure varying as a function of the tidal range and tidal phase. The dynamic estuarine structure can be balanced between the stabilizing effects generated by the vertical density gradient, which produces buoyancy and stratification flows, and the turbulent effects generated by the vertical velocity gradient that generates vertical mixing. The main sediment source for the water column are the bottom sediments, periodically resuspended by the tidal currents. The advective salt and suspended sediment transport was different between neap and spring tides, being more complex at spring tide. The river discharge term was important under both tidal conditions. The tidal correlation term was also important, being dominant in the suspended sediment transport during the spring tide. The gravitational circulation and Stokes drift played a secondary role in the estuarine transport processes.

La investigación biográfica en el estudio de las migraciones internacionales: la utilización de la técnica "BNIM"

[ES] El uso de técnicas cualitativas de investigación en Geografía se ha visto enriquecido, en los últimos años, con nuevos enfoques que proceden de la Sociología. Entre dichos enfoques tiene un papel destacado el biográfico, suponiendo esta mirada un giro al sujeto, que se convierte en objeto de estudio y en fuente esencial de información. Uno de los métodos más novedosos en relación con esta perspectiva es el método BNIM (Biographic Narrative Interpretative Method), que hemos ensayado para el análisis de la trayectoria socioprofesional de los inmigrados latinoamericanos en Canarias, en un momento de particular incidencia de la crisis económica. Sus historias de vida ponen de manifiesto cómo viven la crisis y los sentimientos de pérdida, de desarraigo, de transición, de renuncia, de dificultades… que, aunque consustanciales al propio proceso migratorio, se refuerzan en la actual situación.

Analysis and mathematical modeling of wave-structure interaction

The aim of this thesis, included within the THESEUS project, is the development of a mathematical model 2DV two-phase, based on the existing code IH-2VOF developed by the University of Cantabria, able to represent together the overtopping phenomenon and the sediment transport. Several numerical simulations were carried out in order to analyze the flow characteristics on a dike crest. The results show that the seaward/landward slope does not affect the evolution of the flow depth and velocity over the dike crest whereas the most important parameter is the relative submergence. Wave heights decrease and flow velocities increase while waves travel over the crest. In particular, by increasing the submergence, the wave height decay and the increase of the velocity are less marked. Besides, an appropriate curve able to fit the variation of the wave height/velocity over the dike crest were found. Both for the wave height and for the wave velocity different fitting coefficients were determined on the basis of the submergence and of the significant wave height. An equation describing the trend of the dimensionless coefficient c_h for the wave height was derived. These conclusions could be taken into consideration for the design criteria and the upgrade of the structures. In the second part of the thesis, new equations for the representation of the sediment transport in the IH-2VOF model were introduced in order to represent beach erosion while waves run-up and overtop the sea banks during storms. The new model allows to calculate sediment fluxes in the water column together with the sediment concentration. Moreover it is possible to model the bed profile evolution. Different tests were performed under low-intensity regular waves with an homogeneous layer of sand on the bottom of a channel in order to analyze the erosion-deposition patterns and verify the model results.