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Abstract
The main objective of this research is to enhance water quality in drains to be reused in irrigation purpose using low cost treatment technologies. The research presents a Water Quality Model, a Decision Support System (DSS), and proposes remedial solutions to decrease Biological Oxygen Demand (BOD) concentrations and salinity in drain waters. The water quality model is mainly used to calculate the BOD concentrations along the drain and DSS have been applied at 21 drains in Kafr EL Sheikh Governorate. Sensitivity analysis to different scenarios such as different stream cross section, temperature, discharge and removal efficiency and its effect on the selected treatment technologies have been also checked