Floods in Ghana have become a perennial challenge in the major cities and communities located in low-lying areas. Therefore, cities and communities located in these areas have been classified as potential or natural flood-prone zones. In this study, the Digital Elevation Model (DEM) of the Accra Metropolis was used to assess the drainage density and elevation patterns of the area. The annual population estimation data and flood damages were assessed to understand the damages and population trend. This research focused primarily on the elevation patterns, slope patterns, and drainage density of the Accra Metropolis. Very high drainage density values, which range between 149 and 1117 m/m², showed very high runoff converging areas. High drainage density was also found to be in the range of 1117–1702 m/m², which defined the area as a high runoff converging point. The medium and low converging points of runoff were also found to be ranging between 1702–2563 m/m² and 2563–4070 m/m², respectively. About 32% of the study area is covered by natural flood-prone zones, whereas flood-prone zones also covered 33% and frequent flood zones represent 25%. Areas in the Accra Metropolis that fall in the Accraian and Togo series rock types experience high floods. However, the lineament networks (geological structures) that dominate the Dahomeyan series imply that the geological structures in the Dahomeyan series also channel the runoffs into the low-lying areas, thereby contributing to the perennial flooding in the Accra Metropolis.

加纳的洪水已成为位于低洼地区的主要城市和社区的长期挑战。因此，位于这些地区的城市和社区被归类为潜在的或自然的洪水易发区。在这项研究中，阿克拉大都会的数字高程模型 (DEM) 用于评估该地区的排水密度和高程模式。评估年度人口估计数据和洪水损失，以了解损失和人口趋势。这项研究主要集中在阿克拉大都会的高程模式、坡度模式和排水密度。非常高的排水密度值（介于 149 和 1117 m/m ^{2 之间}）显示出非常高的径流汇聚区域。还发现高排水密度在 1117-1702 m/m 范围内²，该区域定义为高径流汇合点。还发现径流的中低会聚点分别在1702-2563 m/m ²和2563-4070 m/m ^{2 之间}。大约 32% 的研究区域被自然洪水易发区覆盖，而洪水易发区也覆盖了 33%，洪水频发区占 25%。阿克拉大都市中属于阿克拉和多哥系列岩石类型的地区经历了高洪水。然而，占主导地位的 Dahomeyan 系列的线状网络（地质结构）意味着 Dahomeyan 系列中的地质结构也将径流引入低洼地区，从而导致阿克拉大都市的常年洪水。