Determination of the Protective Capacity of the Aquitard Stratum in Some Coastline Towns of Delta State, Nigeria

This study was aimed at determining the protective capacity of the aquitard stratum in some coastline locations in Delta State, Nigeria. This was carried out using the electrical resistivity method. A total of 13 vertical electrical soundings were conducted and data obtained were interpreted by partial curve matching and computer iterative technique. The result of the study show the presence of three to four geoelectric formations comprising top soil, sandy clay/clayey sand, fine sand and medium coarse sand. The aquitard resistivity ranged from 11.8 to 108.8 Ăm while the thickness ranged from 1.0 to 7.4 m. It can be concluded that the protective capacity of the aquitard in the area ranges from poor to moderate.Keywords: Groundwater, Protective Capacity, Aquifer, Aquitard, Electrical Resistivit

The use of third degree polynomial for accurate conversion of seismic time to depth and vice versa

The seismic sections consist of observed travel times versus corresponding impact to geophone distances. These observed times correspond to some depth below the earth surface. In converting these times to depth, various methods may be used. However, in this paper, the conversion is done by solving the third degree polynomial using data from well survey. The results from this study shows that the third degree polynomial can be conveniently fitted to the set of time depth data from the well as it compared favourable with measured values. The result also reveals that the third degree polynomial is a more accurate means of converting the values of seismic time to depth than the use of velocity information. The standard deviation of the polynomial values calculated from the measured values is 6.25milliseconds compared to 7.08milliseconds using the velocity dataJournal of the Nigerian Association of Mathematical Physics Vol. 8 2004: pp. 241-24

Using the Linear Least Square Method in determining the relationship between salinity, electrical conductivity, density and pH for water in some parts of Nigeria.

This study was aimed at generating a mathematical relationship connecting four quality parameters of water, namely salinity, electrical conductivity, density and pH. Samples of surface water and ground water were collected from eight major towns in Delta State, Nigeria. Measurements of the parameters were carried out using digital meters and the data analysed using the linear least square method of fitting a straight line to data points. The analysis of the data yielded a mathematical equation showing the relationship between the four measured parameters. This generated equation was subjected to test for reliability by the determination of the standard deviation. The result reveals that the standard deviation of the calculated values of salinity using the generated equation from the measured values for surfaces water is 2mg/l while that of ground water is 4mg/l. This shows an error of less than 2% and hence the equation can be relied upon. Journal of the Nigerian Association of Mathematical Physics Vol. 9 2005: pp. 415-42

Comparative Noise Pollution Study Of Some Major Towns In Delta State, Nigeria

Comparative noise pollution studies have been carried out in some major towns in Delta State, Nigeria using a PIONneer 65 noise dosimeter. The noise measurements were taken at ten points within each of the towns at an interval of 30 minutes during the peak period of the day and at the cool of the night. The results obtained indicate that the day time equivalent noise level for Warri exceeded the WHO permissible limit of 90dB. All other locations have an equivalent noise level lower than the WHO limit but within the range of 75dBA to 85dBA. The peak noise measurement for the day time exceeded the WHO permissible limit for all the towns except at Abraka with peak of 76.2dBA. At night, the area exhibits a quiet atmosphere for both the equivalent noise level as well as the peak noise measurements. The reason for the high value of noise in some places was due to automobile plying the road at a slow speed as observed in Warri and other places. Other reasons were due to the use of electricity generators resulting from the persistent public power supply failure, commercial motorcycles, recording houses and those using music to promote sales of their wares. KEY WORDS: Noise, Pollution, Permissible, Annoyance, Protection Global Journal of Pure and Applied Sciences Vol.11(2) 2005: 285-29

Empirical Relationships Between Electrical Conductivity, Salinity, Density And Ph Of Ground Water In Parts Of Delta State, Nigeria

An investigation into the physical quality of groundwater in eight major towns in Delta State, Nigeria namely Warri, Sapele, Abraka, Ughelli, Patani, Oleh, Ozoro and Ogharaeki has been carried out by taking measurements of the electrical conductivity, salinity, density and pH. Water samples were collected from boreholes in the different locations prior to any purification process. The obtained data were subjected to spearman rank order statistics and result shows that there were strong positive correlation between the four measured parameters. A “Water Anomoscope” and theoretical equations were therefore designed/generated for the graphical and theoretical determination of any of the four measured parameters. The standard deviation of the measured values from the calculated values for all samples using the “Water Anomoscope” shows a deviation of 0.052μS/cm for conductivity, 0.38mg/l for salinity, 0.0013g/cm3 for density and 0.029 for pH. Result also shows that the values obtained for the four physical parameters obtained for groundwater in Warri, Sapele, Patani and Ogharaeki exceeded the WHO maximum permissible limit. This means that some level of desalination/treatment for the water before consumption would be necessary. On the other hand, the values obtained for Abraka, Ughelli, Oleh and Ozoro fall within the WHO maximum permissible limit for fresh drinking water. KEY WORDS: Electrical Conductivity, Salinity, Density, pH, Water Anomoscope. Global Journal of Pure and Applied Sciences Vol.11(2) 2005: 291-29