Field process measurements and OSL/AMS-dating methods were employed in combination to examine the Holocene evolution of the Keta Sand Spit, east of the Volta River delta in Ghana, as well as the hydrodynamic processes driving present spit dynamics. Large-scale changes in shoreline configuration, with far-field implications for sediment supply to downdrift coasts along the Bight of Benin, have been rooted in river mouth switches, which are dated at approximately 5–7000 yr BP and 2500 yr BP. The most recent barrier stage is the present Keta Sand Spit, which originated about 2500 yr BP. The spit migrates slowly in an easterly direction due to gradients in longshore sediment transport induced by morphodynamic interactions between wave-induced currents and shoreline orientation. These autochthonous longshore transport gradients are the major reason for the large coastal erosion rates in the lee of the Sand Spit, rather than a decreased sediment supply caused by damming of the Volta River.

结合现场过程测量和OSL / AMS约会方法，研究了加纳沃尔塔河三角洲以东的Keta沙嘴的全新世演化，以及驱动当前吐水动力学的流体动力学过程。海岸线构造的大规模变化，对向贝宁湾沿岸漂流海岸的沉积物供应产生了远场影响，其根源是河口开关，其年代大约为5–7000年BP和2500年BP。最近的屏障阶段是目前的Keta Sand Spit，它起源于大约2500年BP。由于波浪引起的洋流和海岸线取向之间的形态动力学相互作用引起的沿岸沉积物运移的梯度，该沙坑向东方向缓慢迁移。