I am Marine Fouin, a french engineering student in agronomy at the ENSAIA, in Nancy, France. As I have always been fascinated by coastal environments I took advantage of the possibility I had to do an internship abroad within my degree to come here, in CIMA (University of Algarve). I joined the EVREST project and my work consists in rating the evolution of the salt marshes morphology inside the Ria Formosa coastal lagoon. Using aerial photographs of the last 60 years we will try to get a clear overview of how the area has been evolving during this timelapse through GIS analysis.