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:: Volume 9, Issue 2 (Spring 2022) ::
Environ. Health Eng. Manag. 2022, 9(2): 125-134 Back to browse issues page
Seasonal variation of reservoir water quality: A case study of Kubanni reservoir, Zaria, Nigeria
Chukwuemeka Eneogwe , Ismaila Mohammed Sanni , Alfa Umar Abubakar , Idoko Apeh Abraham
Corresponding author: Department of Water Resources and Environmental Engineering, Ahmadu Bello University, Zaria, Nigeria , emekaeneogwe@gmail.com
Abstract:   (111 Views)
Background: Reservoirs serve as fishing and domestic water resources for the people living around the catchment area. However, natural activities threaten the water quality, therefore, constant and proper monitoring of the reservoir is necessary. This study aimed to examine seasonal variation in water quality parameters of Kubanni reservoir, Zaria, Nigeria.
Methods: Water quality data of Kubanni reservoir, Zaria, Nigeria, for 7 years (January 2014 to December 2020) were collected and analyzed to understand the seasonal variation. Ten water quality parameters including pH, turbidity, electrical conductivity (EC), temperature, total dissolved solids (TDS), dissolved oxygen (DO), chloride (Cl-), total Iron, nitrate (NO3-), and manganese (Mn) were analyzed. The data were analyzed using Kolmogorov-Smirnov test to select the probability distribution which provides the best fit by EasyFit software. The functions included Weibull, Exponential, Fréchet, Gamma, Lognormal, and Normal. Seasonal variation was determined using Spearman’s rank-order correlation.
Results: The results showed that pH, EC, temperature, TDS and NO3- approach the Weibull distribution. Turbidity and total Iron approach the Fréchet distribution. Mn approaches the normal distribution, while DO and Cl- approach the Gamma distribution. The output of non-parametric Spearman’s correlation coefficient and Spearman’s statistical criterion indicates a significant difference at 5% significance level between the pH and total Iron values recorded in both seasons. This suggests that season has an effect on the concentration of pH and total Iron.
Conclusion: Out of the 10 parameters examined, pH and total Iron are climatologically influenced.
Keywords: Seasons, Water quality, Iron, Normal distribution, Nigeria
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Type of Study: Original Article | Subject: Special
Received: 2022/06/12 | Accepted: 2022/03/26 | Published: 2022/06/22
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Eneogwe C, Sanni I M, Abubakar A U, Abraham I A. Seasonal variation of reservoir water quality: A case study of Kubanni reservoir, Zaria, Nigeria. Environ. Health Eng. Manag.. 2022; 9 (2) :125-134
URL: http://ehemj.com/article-1-954-en.html

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Volume 9, Issue 2 (Spring 2022) Back to browse issues page
مجله مدیریت و مهندسی بهداشت محیط Environmental Health Engineering And Management Journal
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