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Some Physical and Chemical Parameters of Luubara Creek, Ogoni Land, Niger Delta, Nigeria
並列摘要
Some physical and chemical conditions of Luubara creek in Ogoni land area of Nigeria was studied for a period of two years(January, 2006 to December, 2007).The mean monthly rainfall during the sampling period was 169.28±117.57 mm; while the mean monthly humidity was 75.10±5.3%. The ambient temperature recorded for the study area was between 27.65 and 34.35℃ with a mean of 30.62±0.37℃ . The surface water temperature ranged from 25.05 to 32.20℃ with a mean of 27.58±0.18℃. The pH values ranged from 5.00 and 7.5 (acidic to neutral). All the three stations were slightly acidic (pH 6.33-6.56) with a mean of 6.43±0.09. Station 1 and 3 showed slight alkalinity. The lowest pH was recorded in station 2 while station 1 recorded the highest pH. Total alkalinity values ranged from 5.0 and 15.0 mg/L with a mean of 8.11±0.23 mg/L. Station 3 recorded the highest alkalinity (8.35±2.2 mg/L) while station 2 had the lowest alkalinity (7.89±2.10 mg/L). The alkalinity pattern of the creek was variable. Electrical conductivity ranged from 8.0 and 24.50μs/cm and the mean conductivity was 13.37±1.27μs/cm. Station 1 had the lowest electrical conductivity (12.32±4.13μs/cm). The turbidity of the water ranged from 1.50 NIU to 10.00 NTU with a mean of 4.92±0.09 NTU. Station 1 recorded the lowest mean turbidity (4.28±2.05 NTU) while station 2 had the highest mean turbidity (4.50±2.46 NTU).The dissolved oxygen concentration values ranged from 4.00 to 7.50 mg/L with a mean of 5.88±0.21 mg/L. There was a fall in the oxygen concentration. Station 3 had the highest mean oxygen concentration (6.19±0.99 mg/L) while station 2 had the highest mean concentration of 5.73±0.89 mg/L. The dissolved oxygen concentration values ranged from 4.00 to 7.50 mg/L with a mean of 5.88±0.21 mg/L. There was a fall in the oxygen concentration. Station 3 had the highest mean oxygen concentration (6.19±0.99 mg/L) while station 2 had the highest mean concentration of 5.73±0.89 mg/L. Luubara creek is a fresh water creek. Station 1 and station 2 had zero salinity. The mean salinity w as 0.03±0.04‰. The phosphate concentration levels ranged from 0.02 to 0.86 mg/L with a mean of 0.54±0.32 mg/L. Station 1 had the least phosphate concentration (0.73±0.11 mg/L) while station 2 recorded the highest phosphate concentration (0.86±0.12 mg/L). The nitrate concentration values ranged from 0.03 to 1.95mg/L (0.30±0.09 mg/L). Station 1 had the low est mean nitrate concentration of 0.22±0.03 mg/L while station 3 had the highest mean nitrate concentration (0.43±0.54 mg/L).