GROUNDWATER HYDROLOGY OF A MICROBASIN IN GUILFORD COUNTY

Data provided from three monitoring wells in the unconfined aquifer underlying the Guilford College campus indicates that the aquifer may be anisotropic. The wells were completed at different levels in the aquifer, thus permitting analysis of the variability in different parts of the aquifer. A distinct vertical relict foliation in the saprolite and fractures marked by the presence of iron and manganese oxides may partly provide the anisotropy measured at the aquifer. The bedrock materials of Guilford County are granite, gneiss, and schist, from which the overlying saprolite is derived by weathering. The hydraulic conductivities of the two shallower wells are 0.11 ft/day and 0.70 ft/day, as determined by pump tests.