Assessment of Nutrient Concentration in Sokori River, Southwest Nigeria

Journal of Applied Sciences and Environmental Management

AMOLE, O.E.¹  OJEKUNLE, Z.O.¹  ANTHONY, D.E.¹  ERUOLA, A.O.¹  AWOMESO, J.A.¹  AMORI, A.A.¹ 

关键词: Nutrients;    Sokori stream;    Phosphate;    Nitrate;    Sulphate;    Runoff;   

DOI  :  

学科分类：环境科学（综合）

来源: University of Port Harcourt * Department of Pure and Industrial Chemistry

【 摘 要 】

Water management planners are facing considerable uncertainties on futuredemand and availability of water partly due to concentration of nutrient leading to excessiveunsightly growth of aquatic plants and algal bloom in rivers. This study was carried out toassess the trend of nutrient concentration in Sokori stream in Southwest Nigeria. The selectednutrients determined in the stream were nitrate, sulphate and phosphate, dissolved oxygen andbiological oxygen demand. Water samples from 10 sampling point at 100m interval wereexamined to assess the variation in concentration of nutrients along the stream using standardmethod. Descriptive statistics was used in data analysis. The result showed that high nutrientconcentrations were established at the middle section of the stream. It is obvious that sulphatehas the highest concentration (3.60 Mg/l), followed by phosphate (2.13 Mg/l) then nitrate(0.89 Mg/l). However, the nutrient concentrations in the stream were below the acceptablelimit set by the World Health Organization. Furthermore, it was observed that where thenutrients concentration (PO4 = 5.16 Mg/l, SO4,= 9.78 Mg/l, NO2 = 1.46 Mg/l) and the BOD5(10.24 Mg/l) were highest at the mid – section of stream, while the DO concentration (3.63Mg/l) lowest indicating concentrated aquatic life (macro and micro-organisms) activity.Nutrient enrichment leads to excessive growth of primary producers as well as heterotrophicbacteria and fungi, which increases the metabolic activities of stream water leading to adepletion of dissolved oxygen. The low discharge of stream and its fairly flat terrain naturealso influenced the metabolic activities in the mid- section of the stream although there wasno evidence of accumulation of nutrient leading to eutrophication risk.

【 授权许可】

Unknown