Downloads: 8 | Views: 100 | Weekly Hits: ⮙1 | Monthly Hits: ⮙1

Experimental Result Paper | Geomatic Engineering | Tunisia | Volume 12 Issue 2, February 2023

Spatial Remote Sensing, a Necessary Tool in the Study of the Evolution of Coastal Erosion: "The Case of the Atlantic Coast of the City of Moanda in the Democratic Republic of Congo"

Papy Kabadi Lelo Odimba | Issam Nouiri | Zeineb Kassouk

Abstract: The publications on the theme of spatial remote sensing applied to the study of coastal erosion are relatively recent, since they are predominant and current subject to environmental problems and climate change. On this, the sandy coastline of the city of Moanda presents a characteristic morphology of sandy coasts that following the hydrodynamic phenomena; tend to regress towards the mainland. The coastal area of Moanda is only 40 km long, although small on a global scale, but important for the Democratic Republic of Congo, it abounds in enormous biological, energetic and mineral wealth as well as enormous tourist and socio - economic potential. Moreover, due to its location facing the Atlantic Ocean, it is a major border post ensuring the entry and exit to the Congo River and the rest of the country. Therefore, we can in our case, highlight three major concerns that can appear in this article including (1) The mapping of areas degraded by erosion; (2) The quantification of erosion; (3) Monitoring of erosion. The above - mentioned concerns are the key elements in all the approaches aimed at achieving satisfactory results in this case study. The analyses of the results obtained and the experiments carried out in this field highlight the possibilities offered by spatial remote sensing as well as its limitations. Today, the new sensors and techniques allow us to consider a new approach to degraded environments and to obtain precious complementary information for the planning of these spaces and the monitoring of their evolution. We found an overall average recession of ?45 m only for these four test profiles carried out in this work and an average rate of recession in the order of ? - 1.5 to 2 m/year. It is assumed that by 2050, the coastline will have retreated by about 50 m towards the mainland and this if there had not been any conservation work to protect the coast. This can be seen in the images of the remote sensing evolution part with different trends of the erosion evolution by means of different colored lines. The problem that underlies the study is the spatial and temporal dynamics of the coastline of the city of Moanda. The study aims to show how the coastline has evolved over the period of 1986, 2006 and 2016. This evolution has been mapped and quantified from spatial images exploited with GIS software coupled with data from topographic surveys.

Keywords: spatial remote sensing, erosion, topographic surveys, multi temporal

Edition: Volume 12 Issue 2, February 2023,

Pages: 511 - 518