Environmental Impacts of Sand Dredging in Awoyaya, Lagos State, Nigeria

Abstract

The research analysed the environmental impacts of sand dredging in Awoyaya, Lagos State. Water and soil samples were collected from three different locations in the study area. The results of water analysis reveals that average pH of water is 6.16, the average temperature of water is 27.55?C, the average chloride of water is 0.11mg/l, the average turbidity of water is 118ppm, the average sulphate of water is 45.67ppm, the average total dissolve solid in water is 98.3mg/l, the average total suspended solid in water is 114.1mg/l, the average total solid of water is 213ppm, the average iron present in water is 0.07ppm, and the average Zinc present in water is 0.015ppm. The results of the physiochemical and geochemical parameters of soil show that the average pH of soil is 7.78, the average organic carbon, organic matter, nitrogen and phosphorous of soil are 0.42%, 0.72%, 0.05%, and 10.73% respectively and the average values of SiO₂, TiO₂, Al2O3, Fe₂O₃, MgO, CaO, Na₂O, K₂O present in the soil are 80.97%, 1.64%, 1.33%, 1.55%, 1.00%, 0.20%, 0.21%, 0.15 respectively. The analysis carried out shows that the dredging in Awoyaya has little impact on water and soil in the dredging area.

Keywords: Environmental impact, Turbidity, Temperature, Organic Carbon, Organic Matter, Total dissolved solid, total solid, total suspended solid.