Abstract
This study determined the quality of surface and underground water in Itagunmodi in Nigeria. Physicochemical analysis of water samples collected within gold mining area and the water consumed in the town was carried out to determine their hygienic conditions. The major objective of this study was assessment degree of groundwater pollution around the mining sites and the available water consumed in the town. Four major sources of water were analyzed. Several physical and chemical parameters were tested in groundwater, these include pH, total solids (TS), total dissolved solids (TDS), conductivity, total alkalinity, total hardness (TH), chloride (Cl-1), sulphur (S), heavy metals (Pb, Zn, Cu), major cation (Mg). The results show that the parameters are within the standard acceptable levels which are required for drinking water adapted from World Health Organization. The pH of the samples was suitable for drinking according to the World Health Organization standard. For a safe drinking water, the pH should be between 6.5 and 8.5); it can be said that the water quality of the samples are fairly good based on the monitored elements and physicochemical characteristics. Key words: Groundwater, conductivity, heavy metals, gold mining site, pollution.
Highlights
Groundwater dewatering designs are often required prior to undertaking any subsurface geotechnical constructions (Ergun and Naicakan, 1993; Powers et al, 2007)
We present a case study of a dewatering prediction rate estimate with the development of a numerical groundwater model of a large coastal construction site in the Middle East
A groundwater model was developed for the purpose of estimating both the dewatering rates and the volume of groundwater that required removal from the three pits to achieve a construction dewatering groundwater elevation of -18.5 m
Summary
Groundwater dewatering designs are often required prior to undertaking any subsurface geotechnical constructions (Ergun and Naicakan, 1993; Powers et al, 2007). Understanding the geology, hydrogeology, and heterogeneity of the subsurface prior to undertaking dewatering is critical in successful geotechnical construction designs. Dewatering in a heterogeneous system requires development of a numerical groundwater model to better predict the number of well points or pumping wells required and the time-variant nature of the dewatering process (Boak et al, 2007). Develop a calibrated numerical groundwater model at and around three pits to include the site groundwater elevation shown in Figure 1 (determined from geotechnical boring logs and a limited number of groundwater observation wells) and The main objectives of this paper are to: 1. Develop a calibrated numerical groundwater model at and around three pits to include the site groundwater elevation shown in Figure 1 (determined from geotechnical boring logs and a limited number of groundwater observation wells) and
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