COMPARATIVE-ANALYSIS OF TRANSMISSIVITY AND HYDRAULIC CONDUCTIVITY VALUES FROM THE AJALI AQUIFER SYSTEM OF NIGERIA

The lack of data on aquifer parameters such as hydraulic conductivity (K), transmissivity (T) and storativity (S) is a major problem bedeviling groundwater resources planners and managers in many developing countries like Nigeria. An attempt is made here to find alternative methods of aquifer analysis that are simpler and cheaper than pumping test analysis, and can yield usable K land T values in situations where pumping-test analysis has not been or cannot be done. Three grain-size statistical methods and Logan's (1964) approximation method were used to calculate K and T for the aquifers of the Ajali Formation of Nigeria. The resulting data are compared with those of pumping-test methods where available. It was found that the Masch and Denny (1966) statistical method gave values that are as reliable and useful as Logan's and other pumping-test methods.