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Abstract
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Article Information:
Some Physical and Chemical Characteristics in Okpoka Creek, Niger Delta, Nigeria
J.F.N. Abowei and A.D.I. George
Corresponding Author: Abowei Jasper
Submitted: 2009 August, 07
Accepted: 2009 August, 28
Published: |
Abstract:
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Some physical and chemical characteristics in okpoka creek was studied for one year. There was a
long wet season stretching from April to October in and a dry season extending from November to March. The
total monthly rainfall ranged from 1.8mm to 399.6mm. The highest total rainfall (399.6mm) was recorded in
July while the lowest rainfall (1.8mm) was observed in January. The atmospheric temperature fluctuated from
28.5°C in July to 33°C in M arch. The monthly water temperature values ranged between 27°C and 31°C across
the Stations. The mean temperatures were similar along the Stations (P£0.05) ranging from 28.98±0.23°C
(Station 4) to 29.77±0.15°C (Station 5). A steady trend of temperature was observed in Stations 1, 2 and 4 as
well as in stations 3 and 6. Generally, temperature values were stable across stations. Maximum temperature
of 31°C was recorded in January, February, March, July, and October. W hile the lowest temperature of 27°C
was observed in July, August and September. There was slight seasonal variation of temperature between dry
(29.49±0.11°C) and wet season (29.09±0.125°C). A steady trend of temperature variation was observed. The
mean pH value ranged between 6.68±0.07 (Station 1) and 7.03±0.05 (Station 6). The Spatial and temporal
variations of pH were minimal. Seasonal variation in pH was observed between dry season (6.97±0.044) and
wet season (6.81±0.367). Salinity values ranged between 0.60‰ and 20.90‰. The highest salinity value
(20.90‰) was recorded in June at station 6 and the lowest salinity value (0.60‰) was observed in October at
station 1. The means varied from 4.75±0.79 (Station 1) to 12.65±1.36‰ (Station 6). There was spatial variation
with a general trend that showed increased salinity values from station 1 to station 6. Some Seasonal variation
was also observed with higher salinity during the dry season (11.67±0.517‰) than the wet season
(6.98±0.701‰). Dissolved oxygen values values range from 0.4mg/L and 8.34 mg/L. The highest dissolved
oxygen concentration (9.6mg/L) was observed in station 3 while the lowest value (0.4mg/L) was recorded in
station 6. The mean dissolved oxygen concentrations ranged between 3.72±041mg/L and 5.10±0.29mg/L across
the stations. There was no seasonal and annual variation observed in the concentrations of dissolved oxygen.
Biochemical oxygen demand varied from 0.0mg/L to 6.4mg/L. The lowest biochemical oxygen demand value
(0.0mg/L) was recorded in December and the highest value (6.4mg/L) was observed in station 1 (March) as
well as station 4. The mean biochemical oxygen demand oxygen ranged between 1.97±0.28mg/L and
2.69±0.26mg/L across the stations. No seasonal and temporal variations were observed in the biochemical
oxygen demand. Monthly conductivity values observed ranged from 920mscm-1 and 33100mscm-1 across the
stations. Generally, an increasing trend was observed from station 1 to station 6 with mean values varying from
10788.75±1053.87mscm-1 (Station 1) to 24877.92±1430.65mscm-1 (Station 6). Seasonal variation in
conductivity with a general trend of higher conductivity in the dry season 18943.17±914.304mscm-1 than the
wet 16794.38±985.154mscm-1 season was observed. Spatial variation of conductivity was significant (p<0.05)
with a general trend of increase from station 1 (upstream) to station 6 (downstream).
Key words: Physical and chemical characteristics,, Okpoba creek, Niger Delta, Nigeria, , ,
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Cite this Reference:
J.F.N. Abowei and A.D.I. George, . Some Physical and Chemical Characteristics in Okpoka Creek, Niger Delta, Nigeria. Research Journal of Environmental and Earth Sciences, (2): Page No: 45-53.
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ISSN (Online): 2041-0492
ISSN (Print): 2041-0484 |
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