Porosity variation was observed to established high predominant heterogeneous concentration in this study, this condition was monitored on development of derived model to monitor the transport to phreatic depositions, such observed condition was found significant by applying nonhomogeneous system in monitoring the rates of Enterobacter transport in sand gravel formation. Linear trend were observed on the validation of the derived model simulation values, but monitoring the rate of porosity reflection on the transport process was when the concentration were plotted against variation of porosity, the lowest soil porosity developed highest concentration, while the highest soil porosity generated lowest concentration of the contaminant, the system from the expression shows the rate at which variation of soil porosity reflect it influence on the growth rate of Enterobacter in sand gravel deposition, the study has significant detailed various rate of porosity effect on the transport process to phreatic beds, the rate of migration also explained various rate of porosity variation based on porous rocks disintegration at various soil matrix, these are structured to develop variations of porous medium in sand grave formations. Such condition has made this paper imperative to monitor the growth rate of Enterobacter transport under the influences of porosity variation in sand grave depositions.

The study examined the transport of Shigella in heterogeneous gravel formation, this is to monitored the migration of Shigella in two different ways, monitoring of the contaminants at vertical direction were increase in in concentration with respect to change in depth and monitoring the concentration influenced by variation of gravel porosities, these two dimension were carried out, it was observed that the transport of Shigella in vertical direction experienced exponential growth rate to the optimum level recorded at ninety meters, this can be attributed to deposition of micronutrients that may increase the population rate of Shigella, this increase the concentration of the contaminant to the optimum depth, while that of porosity influences experienced variation of soil consolidation, decrease in porosity where high consolidation is observed experienced high concentration of Shigella, while increase in soil porosity decrease the concentration of Shigella at different location as observed from the study, the predictive values were subjected to model validation, and both parameters developed best fits correlation, the study has express the influenced from variation of soil porosity under fluctuation of soil consolidation in the study. It has also expressed the growth rate of Shigella influenced by variation of micronutrients in the formation; experts will definitely fine this study useful in monitoring and evaluation of microbial transport in soil and water environment.