The impact of gas flaring on Ebocha-Egbema environment in the Niger Delta area of Nigeria was investigated. Mbutu Mbaise which has no oil-drilling or gas flaring site, was selected as the control environment. Concentrations of air quality indices: carbon monoxide (CO), nitrogen dioxide (NO2), sulphur dioxide (SO2), methane (CH4) and particulates were determined. Air quality measurements in Ebocha were made, at least, 500 meters from the flaring site. Values of important indices of soil physico-chemical parameters: pH, nitrate (NO3), sulphate (SO4) and percentage carbon were determined for the two environments. Water samples from the two environments were analysed for their physico-chemical parameters. Results obtained revealedthat the mean values for air quality indices, soil and water physico-chemical parameters for Ebocha were substantially higher than those for Mbutu Mbaise except pH values obtained for soil and water, indicating that gas flaring exerts adverse ecological effect on the air, soil and water environments in Ebocha.
Well Water Quality Assessment Using Water Quality Index in Warri Metropolis, Delta State, Nigeria (Published)
Well water samples from sixteen locations were collected and analysed within Warri metropolis to ascertain their quality using water quality index (WQI). The WQI was determined based on thirteen physico-chemical parameters. All the physico-chemical parameters of the well waters analysed were within standard regulatory limits. The water quality rating and water quality index (WQI) of the sixteen locations range from 23.61 (Ovwian) to 32.95 (Ugbomro) indicating the water quality to be of good quality. Most of the well water sampled are used for drinking purposes and as a result are provided with casing on the side called “rings” while the top is usually provided with a cover and are locked to prevent stray objects and other unwated materials from entering the well. This provides a good protection and prevention mechanisn for all the well waters. Overall the results indicate that the different well waters samples analysed from Warri Metropolis are safe for human consumptions therefore may not need further treatment.
A GENERALIZED METHOD FOR ESTIMATING PARAMETERS AND MODEL OF BEST FIT IN LOG-LINEAR MODELS. (Published)
In this article, we proposed generalized method and developed algorithms for estimation of parameters and best model fit of log linear model for dimensional contingency tables. For purpose of this work, the method was used to provide estimates of parameters of log –linear model for four- dimensional contingency table. Parameters of higher dimensional tables can in like manner be estimated. In estimating these parameters and best model fit, computer programs in R were developed for the implementation of the algorithms. The iterative proportional fitting was used to estimate the parameters and goodness of fits of models of the log linear model. A real life data was used for illustration and the result obtained showed the best model fit for four dimensional contingency table is [BSG, BGA]. This showed that the best model fit must have sufficient evidence to fit the data without loss of information and must have the highest p-value and least likelihood ratio estimate.
Effect of Timber Resource Processing on the Edibe-Edibe Creek in Calabar South Local Government Area of Cross River State, Nigeria (Published)
This study examines the quality of water and the variation in the physical and chemical properties of water in the Edibe-edibe Creek. It also looked at the microbial characteristics of the Creek. The data for the study were derived from direct field observation, sampling measure in situ measure and laboratory analysis. The phypico-chemical parameters as well as the bacteriological parameters were analysed the laboratory using various instruments. The result of the analysis revealed that: except for electrical conductivity, PH and iron, all other parameters were on the increase from station one to two. However, nitrate had the same values in both, Station one and two. The biological analysis also revealed that the parameters had an increase value from station one to two. Generally, it was discovered that the water in this Creek is not good for domestic purposes because of the availability of nitrate and the acidic nature of the water.