Effect of Waste Discharges on the Water Quality of Asa River in Ilorin, Nigeria
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Date
2005
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Faculty of Pure and Applied Sciences, LAUTECH.
Abstract
Section of Asa river along its course in Ilorin, Kwara State, Nigeria, were studied over a period of 12 months (covering the raining and dry seasons) to determine the effect of various municipal and industrial waste discharges on the water quality of the river. Water samples were collected from four different points along the course. Sampling and analysis were carried out at monthly intervals between July 2003 and June 2004. The following parameters were monitored at each point in order to assess the water quality of Asa river: pH, alkalinity, colour, turbidity, conductance, dissolved and suspended solids, total hardness, levels of magnesium, sodium, potassium, calcium, total iron, manganese, lead, copper, nitrate, sulphate, chloride, ammonia, Dissolved Oxygen (DO), Biochemical Oxygen Demand (BOD5) and carbon dioxide (CO2).
The results showed that the level of pollution varied depending on the season and that the water quality was acceptable before entering the town and becomes unacceptable as it flows across the heart of the town indicating significant pollution from both industrial and municipal waste discharges.
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Keywords
Waste Discharges, Water Quality, Asa River, Ilorin,, Nigeria