The impact of geochemical seismic explosive energy on the turbidity of groundwater in Ohuru-Oza area, Niger Delta, Nigeria

Madu Anthony Joseph Chinenyeze, Otuokere Ifeanyi Edozie

Abstract


Objective: The impact of geochemical seismic explosive energy on the turbidity of groundwater in Ohuru-Oza area, Niger Delta, Nigeria was investigated with dynamite energy source.

Methods: High explosive dynamite (trinitrotoluene) was used as the seismic energy source. A total amount of 84207 kg dynamite was detonated in 41, 949 source point in an area of 549.73 square kilometers of Ohuru-Oza area. Eleven boreholes were used for this study. The turbidity values were determined using a turbidimeter. A control sample was taken from the borehole stations by sampling a day before detonation of dynamite. Subsequently, sampling was carried out a day after dynamite detonation and then, on a fourth-nightly basis.

Results: The average turbidity value of the control (sample water before detonation) was 4.00 NTU. After dynamite detonation, the average measured turbidity values ranged from 3.54 to 4.54 NTU. The representative lithology are mainly non-plastics also categorized as the cohensionless sands. The Coefficient of permeability, K, at a depth of 13m was 4.0 cm/sec.

Conclusions: These variations from the control are not significant enough for dynamite to be said to have impacted on the turbidity value of the ground water.  The control and test results values are both within the Federal Ministry of Environment, Housing and Urban Development (FMEnv&UD) limit of 10 NTU. The Coefficient of permeability showed that the rate of transport of fluids within the vadose zone and aquifers of the study area favoured the transmission and diffusion of any slight contamination.


Keywords


Seismic, groundwater, turbidity, Ohuru-Oza, contamination

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References


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