Aplicação de geotecnologias na monitorização da alteração da linha da costa oceânica, caso de estudo: bairro de Chaimite, cidade da Beira

Abstract

The city of Beira, specifically Praia Nova located in the Chaimite neighborhood, has insufficient coastline monitoring, which makes the indiscriminate use of the coastal zone possible, which can result in financial losses arising from the loss of properties located in this area. The development of technology over the years has allowed us to achieve better results in a short space of time in several areas. The application of Remote Sensing and GIS in particular has helped in this process of achieving better results in a short space of time. In coastal management in particular, the application of Remote Sensing and GIS is important because it helps, for example, in monitoring the variation of the coastline. The present work aims to analyze the variation of the coastline change in 2002, 2012 and 2022 of Praia Nova in the city of Beira in the Chaimite neighborhood, Sofala province, using Remote Sensing and Geographic Information System with DSAS (Digital Shoreline Analysis System) tool. For this, the water index (MNDWI) was calculated with the aim of extracting the coastlines from the satellite images used. The adoption of studies that aim to determine the rates of coastline change constitute an essential tool for correct decision-making about the use and adequate management of the coastal zone. The results of these studies ranged from -8.05 to 1 (m/year) for the Linear Regression Rate (LRR), there was a variation of -8.23 to 0.80 (m/year) for the End Point Rate (EPR) and there was a variation of 10.94 to 352.85 (m/year in the Maximum Distance of Shoreline Change or Shoreline Change Envelope (SCE)(TRADUÇÃO NOSSA)