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Assessing Factors Controlling the Hydrochemistry and Suitability for Irrigation Purposes of Aquifer AQ-2 in Pointe-Noire, South-West Congo-Brazzaville
並列摘要
The groundwater of AQ-2 in Pointe-Noire (south-west town of Congo-Brazzaville) was assessed for factors controlling the hydrochemistry and its irrigation suitability. Thirty three groundwater samples collected from 11 piezometers were analyzed for physical parameters such as: pH, temperature (T), Total Dissolved Solids (TDS); major cations: Ca^(2+), Mg^(2+), Na^+, K^+ and anions C1^- , SO_4^(2-) , HCO_3^-. Factor analysis revealed four factors associated with the mineralization, alkalinity, temperature and pH of the groundwater. Some indexes which can influence the groundwater quality for irrigation were determined: Sodium Adsorption Ratio (SAR), percent of sodium (%Na), Residual Sodium Carbonate (RSC), Permeability Index (PI) and Potential Salinity (PS). These indexes for water irrigation were compared with standard limits. They have been found within the safe limit suitable for irrigation. The total dissolved solids in the groundwater were lower than 1500 mg/L, this denotes that irrigation using groundwater of aquifer AQ-2 in Pointe-Noire would not cause salinity hazards.
延伸閱讀
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