Umudike Journal of Engineering and Technology

This study was conducted to characterize sediments in the Lagos lagoon and to investigate the sediments stratigraphy of the lagoon. To achieve these, sediment samples were collected from four locations (Victoria Island, Kosofe Mile 12, Ikorodu Ibeshe and Majidun Ogolonto) and they were examined physically and chemically. Physical properties such as moisture content and grain size distribution of the sediments of the four study areas were determined by mechanical sieve analysis of the samples, Coefficient Uniformity (Cu) and Coefficient of Curvature (Cc). The sediments were digested and analyzed for their levels of heavy metals which include Zinc, Iron, Manganese, Lead, Cadmium, Chromium, and other elements like Sodium and Potassium. The physical assessment indicated that the moisture content of the Kosofe Mile 12 sample drains better because of its low percentage moisture content relative to other samples. The concentration of Iron was found to be the highest in all the locations. Cadmium and Chromium were not detected in all the samples. The sediments analysis results showed that majority of the samples were coarse sand particles having about 90% for each sample. 5.4% was recorded for clay showing how fine the soil was for the four samples.