Coastal Erosion at Keta Lagoon, Ghana – Large Scale Solution to a Large Scale Problem

Estimating the fluvial sediment input to the coastal sediment budget: A case study of Ghana

“…Numerous minor defence schemes developed over the years to halt this high rate of erosion east of the Volta delta were ineffective (Armah, 1991). Keta was almost destroyed by erosion prior to construction of a major defence project and reclamation work that was completed in 2002 (Nairn and Hayes, 1997;Nairn et al, 1998;Boateng, 2009).…”

A Biophysical and Socioeconomic Review of the Volta Delta, Ghana

“…The typical significant wave height is about 1.4 m with a period of about 11 seconds (Angnuureng, Appeaning Addo, and Wiafe, 2013). The waves generate significant longshore currents, which transport sediment eastward, causing one of the highest rates of annual net longshore sand drift in the world (1-1.5 3 10 6 m 3 /y) due to the consistent wave action and direction (Anthony and Blivi, 1999;Nairn et al, 1999).…”

“…The delta plain is almost flat and featureless, and it descends gradually from inland to the Gulf of Guinea (Sekyi, 2004). The delta was formed by large quantities of sediment from the Volta River, including coarsegrained sand that was deposited at the river mouth (Nairn et al, 1999). According to Anthony (2015), the delta is asymmetric and diverted eastward over a distance of about 30 km.…”

“…The delta exhibits some natural oscillations and variations in its growth and loss (Akyeampong, 2001). According to Nairn et al (1999), several thousand years ago, the river mouth of the delta was located farther east, about 20 km. However, the river mouth has migrated westward to its present location in Ada (Anthony, Almar, and Aagaard, 2016).…”

Performance Evaluation of a Beach Nourishment Project at West Beach in Beidaihe, China

“…One of the widely used design tools is the shoreline evolution model such as GENESIS, developed by the Coastal Engineering Research Center (CERC) . Nairn et al (1998) used GENESIS to evaluate the performance of a beach nourishment project in Keta Lagoon, Ghana in West Africa. Ravens and Sitanggang (2007) used the GENESIS model, which was calibrated by modeling the shoreline change from 1990 to 2001, to design the beach nourishment at Galveston Island on the upper Texas gulf coast.…”