Integrated use of hydrochemistry and resistivity methods in groundwater contamination caused by a recently closed solid waste site

In order to investigate the groundwater ies aimed at defining the spatial contamination by solid waste disposal using both ies aimed at defining the spatial hydrochemical and geophysical methods, the Halkali (Istanbul) solid waste disposal site which was closed in 1994 was investigated. The disposal site lies on a ridge between two valleys filed with alluvium. A total of six boreholes were drilled on two lines across the Menekse valley adjacent to the Halkali site. Groundwater samples collected from these boreholes were analyzed for various contaminant parameters. The results indicate that TDS and chloride concentrations decrease horizontally away from the waste site whereas they increase with depth. Electrical soundings carried out at 12 locations yielded high resistivity values at the upstream part of Menekse valley while lower values were obtained from the locations near the leachate seepage points

Predicting the physico-mechanical properties of igneous rocks from electrical resistivity measurements

International Symposium of the International-Society-for-Rock-Mechanics -- MAY 09-12, 2006 -- Liege, BELGIUMWOS: 000242969900081Electrical resistivity values of eight different igneous rocks were measured on core samples using a resistivity meter in the laboratory. The resistivity tests were conducted on the samples fully saturated with brine (NaCl solution) and uniaxial compressive strength, Brazilian tensile strength, density and porosity values of the samples were determined in the laboratory. Resistivity values were correlated with the corresponding physico-mechanical properties using simple regression analysis methods. Generally strong correlations obtained from regression analysis. Concluding remark is that electrical resistivity may be a representative measure of properties of igneous rocks. However, further research is necessary to check how the stronger and different igneous rocks affect the correlations.Int Soc Rock MechTurkish Academy of Sciences [EA-TUBA-GEBIP/2001-1-1]This work has been supported by the Turkish Academy of Sciences, in the framework of the Young Scientist Award Program (EA-TUBA-GEBIP/2001-1-1)