Eleyele reservoir is a vital resource for fishery, domestic water supply and flood control. Unfortunately, the reservoir is fast being degraded due to various anthropogenic activities around its catchments. Hence, this study evaluates spatio-temporal variations in the physico-chemical parameters of the reservoir. Eleyele reservoir was stratified into five zones (S1-S5) based on hydrological features and three sampling points were randomly selected per zone. Water samples were collected bi-monthly from each station for 24 months covering wet (May-November) and dry (December-April) seasons. Water parameters were analysed for alkalinity (mg/L), phosphate (mg/L), Dissolved Oxygen (DO, mg/L), Biological Oxygen Demand (BOD, mg/L), Chemical Oxygen Demand (BOD, mg/L) and temperature (C) following standard procedures. Highest and least alkalinity (103.63 14.87; 96.25 11.41) and phosphate (2.00 0.69; 1.94 0.66) were recorded in S2 and S4, respectively. Temperature and DO ranged from 26.53 2.20 (S5) to 26.86 2.45 (S1) and 4.24 0.84 (S2) to 5.39 0.82 (S5), respectively. Alkalinity were 99. 72 12.41 and 100.91 16.14, phosphate (1.71 0.55; 2.10 0.61), temperature (28.20 2.34; 25.53 1.74) and DO (4.48 0.98; 4.85 0.97) in dry and wet seasons, respectively. The mean values obtained for Biological Oxygen Demand (4.29 2.23 mgl -1 ), temperature (26.64 2.36), conductivity (0.270 0.21 Scm -1 ), alkalinity (100.42 14.69), hardness (69.18 30.94 mgl -1 ) and ions were within desirable limits for aquatic life. Crucial steps should be taken to reduce agricultural activities and anthropogenic discharges into the Reservoir.
No takes yet. Share an insight, caveat, or question.
Nurudeen et al. (2017) studied this question.