Modelling the Effect of Industrial Effluents on Water Quality: “A Case Study of River Challawa in Nigeria”
Journal Title: International Journal of Modern Engineering Research (IJMER) - Year 2013, Vol 3, Issue 5
Abstract
The physicochemical characteristics associated with industrial effluents from the Challawa and Sharada Industrial Estate in Kumbotso Local Government Area of Kano State ad the effect on water quality of a 10.6 km stretch downstream of River Challawa were investigated. The test period covered both wet and dry seasons, with laboratory analysis of field samples and study area. The results obtained indicated that the DO values varied from 0 mg/l to 3.5 mg/l, BOD5 value ranged from 193 mg/l to 1025 mg/l along the river channel. The reaeration coefficient k2 of River Challawa varied from 0.013 to 0.140. The 0.013 to 0.140. The coefficient of correlation between k2 predicted with derived models were 0.229, 0.295, 0.994, 0.842, 0.676, 0.855 and 0.473. An improved technique using the reaeration coefficient values at each section and incorporating the fall velocity gave a profile closer to the measured oxygen deficit values than the conventional approach. The coefficients of correlation for the two approaches are 0.9572 and 0.4558 respectively. The comparison of k2 observed and predicted k2 O’Conner and Dobbins, Ugbebor and Agunwamba, Churchill and Buckingham, and Agunwamba indicated standard errors of 1.5156, 2.3376, 04216, 1.3891, 0.0488, 0.3854 and 1.7721 respectively. Test result also gave a purification factor of 0.40, indicating the stream was polluted and has poor assimilatory capacity. There is need for proper monitoring and impact control measures for River Challawa.
Authors and Affiliations
T. A. Adedokun
Keywords
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