Coastal zones are possibly the most attractive areas for urban expansion and the ones that most feel the effects of climate change. Studies show that many of the world s main coastal urban centers suffer, and may suffer even more, serious losses due to erosion in the coming decades (UNU-IHDP-2015). However, it is important to recognize that the effects of climate change are not the only factor that is driving the risks that coastal cities face. Globally, beach erosion is a negative impact and can occur due to causes attributed to a range of natural factors, but also to various human interventions in the coastal zone (Souza, 2009). The coastal zone is the boundary environment between the continent and the ocean, which is totally dynamic and has been pressured by different agents, natural and/or artificial, mainly in the transition zone, the urban beach, and, therefore, the urban expansion in coastal areas proves to be a highly sensitive issue. Over time, the effects of climate change in coastal areas can be perceived in the gradual increase in the magnitude and frequency of many of the natural events, considered extreme, such as intense rains, strong cold fronts, cyclones, and the increase in the level of the sea. sea, revealing threats to coastal urban areas, which are already feeling these effects highlighted by rapid urbanization in recent years (UN-Human Settlements, 2011). Another relevant fact is the proportion between available area and population in coastal municipalities. Figure 1 (IBGE, 2011) shows that the municipalities in the coastal zone occupy an area of 4.1percent of the total available in Brazil and, in 2010, housed a population corresponding to 24.6 percent of the total Brazilian population. Such proportional relationship points to a tendency of territorial conflict, also considering the areas of urban beaches that are not limited to the beach itself, but the entire beach system among other elements that make up the beach morphodynamics, further reducing the available space.