The phenomenon of fallen lands is a recurring issue throughout the Amazon, causing various damages to riverside communities. Among the communities facing this process of erosion, which occurs along riverbanks, are Vila do Progresso and Macedônia, located in the state of Amapá. In response to this issue, the "Guariba" app serves as an alert system for monitoring the advance and occurrence of erosion. Families will be able to view areas with imminent impact and areas that are safer for building their homes and planting their crops.