The present work has the goal of obtaining and gathering pieces of information from the inside and surrounding of Jacarepaguá Lagoon, Rio de Janeiro, and to make models to help in the governmental management of the area, that is so featured because of its population growth and its visibility due to sporting events that will take place in this location, specially the 2016 Olympic Games. Two models have been made, bathymetric and geological ones, which followed the same work methodology: data collection, development and validation of the model through geophysical survey using georadar. For the first model a bathymetry was done in Lagoon getting georeferrenced depths on field to elaborate 3D and 2D models of depths, in order to identify ditches originated from dredging of embankments of actions on its borders. Finally, GPR (Ground Penetration Radar) surveys were made on the inside of Lagoon with the purpose to compare the predetermined sections of the model. Although the radargrams did not show good results due to the water electric conductivity, the water was still saline despite the distance of the ocean. The second model was developed based on data from pre-existing surveys of the area that achieved 3D models, lithological and cronostratigraphic, where transverse sections were done so that it could be possible to obtain a better space visualization. The validation of this model from the comparison of GPR sections with sections extracted from the model, obtained satisfactory results, complementing the geological processed model interpretation. From this geological model, layers were identified in specific depths, locating concentrated zones of soft soils on the studying area.