Satellite, drone and video camera multi-platform monitoring of coastal erosion at an engineered pocket beach: A showcase for coastal management at Elmina Bay, Ghana (West Africa)

African Coastal Camera Network: Monitoring Ocean, Climate, and Human Impacts

“…They also clearly identi ed the potential causes and areas of erosion at Elmina, associated with breaking wave conditions. The obtained results indicated that the presence of the defense systems adequately protected the section of the beach, and a larger unprotected portion of the beach was out of balance with high erosion rates (Angnuureng et al, 2022). This is an example of the application of video data: to verify and evaluate the effectiveness of protective structures that are built along the coasts of Africa, and how they can induce upstream or downstream morphological imbalances.…”

“…The multi-platform data collection strategy (Angnuureng et al, 2022) was deployed for a year at Elmina, through the use of the installed video camera station, drones (unmanned aerial vehicles), Sentinel satellite images, and a dumpy level. Angnuureng et al (2022) revealed that data from local video cameras and drones are more effective for operational monitoring of shoreline changes at all-time scales compared to satellite imagery. They also clearly identi ed the potential causes and areas of erosion at Elmina, associated with breaking wave conditions.…”

“…The logistics and expense of using a video camera for coastal monitoring are typically less than those of more conventional approaches, which involve placing a vast array of instruments at a limited number of locations. Unlike satellite imagery which has a low temporal resolution for detecting daily or event-based beach changes and low spatial resolution for coastal studies and management decisions, video cameras provide a pixel resolution and cover timescales from seconds to years (Angnuureng et al, 2022). Although more suitable for smaller-scale applications, video camera system networks can be used for long-term coastal monitoring and to track the impacts of human and natural processes, especially climate change, on coastal ecosystems.…”

African coastal camera network efforts at monitoring ocean, climate, and human impacts

“…Two 200 m long jetties were built on either side of the mouth of Benya lagoon and a seawall was built at the fish-landing site near Elmina Castle, 800 m from the north side of the mouth of Benya Lagoon 67 . The multi-platform data collection strategy Angnuureng et al 68 , 69 was deployed for a year at Elmina (Ghana), through the use of the installed video camera system, drones (unmanned aerial vehicles), Sentinel satellite images, and a dumpy level (optical surveying levelling instrument). Angnuureng et al 68 revealed that data from local video cameras and drones are more effective for operational monitoring of shoreline changes at all-time scales compared to satellite imagery that is unsuitable for detecting daily or event-based beach changes needed by practitioners and management decisions.…”

“…The multi-platform data collection strategy Angnuureng et al 68 , 69 was deployed for a year at Elmina (Ghana), through the use of the installed video camera system, drones (unmanned aerial vehicles), Sentinel satellite images, and a dumpy level (optical surveying levelling instrument). Angnuureng et al 68 revealed that data from local video cameras and drones are more effective for operational monitoring of shoreline changes at all-time scales compared to satellite imagery that is unsuitable for detecting daily or event-based beach changes needed by practitioners and management decisions. The obtained results indicated that the presence of the defense systems adequately protected the section of the beach, and a larger unprotected portion of the beach was out of balance with high erosion rates 68 .…”