Dinámica costera y bases para el ordenamiento territorial en el Balneario Bahía Creek, Provinca de Río Negro

Abstract

The present final degree project is developed between the coastal locations of Bahía Creek and Caleta de los Loros, located NE of the Río Negro province. It was developed the geological and geomorphological study of the area to know the dynamics of the system. Taking into account the alterations that the population may cause or the hazard to which it may be exposed, a zoning of the territory was proposed in order to be able to establish the bases for the land use planning. Among the most outstanding geomorphological features are the dunes, the cliff and the extensive tidal plain. The first two are of vital importance at the time of studying the geological hazard, due to its retreat in the case of the cliffs or its advance in the case of the dunes. The cliff is formed by deposits of the Rio Negro and Tehuelche formations and has moderate structures. The dunes have a great variety of morphologies and are mostly composed of fine and medium sand, very well selected. At the same time, some samples studied under the microscope were classified as feldespatic lithoarenite and lithic feldarenite. By carrying out a vulnerability index for the backward movement of the cliff, it was found that it presents low vulnerability, while the dunes in the vicinity of the town of Bahía Creek show an average rate of 2.4 m /year with values higher than 10 m /year and general direction of progress towards the SE and ENE. This means that most of the houses are located in an intangible zone, not recommended for buildings. Therefore, a new site is proposed for the future development of Bahía Creek town, located a few kilometers east of the existing one.