A precise map of the dispersion groundwater potential across each watershed can help decision-makers to exert optimal water management in region. In this research, resources both Zanjanrood Catchment and Tarom Region, located northwest Iran, has been studied. Seven effective criteria including slope, land-use, drainage density, spring lithology, lineament rainfall are considered. Criteria were ...

Time-domain electromagnetic (TDEM) migration is based on downward extrapolation of the observed field in reverse time. In fact, the migrated EM field is the solution of the boundary-value problem for the adjoint Maxwell's equations. The important question is how this imaging technique can be related to the solution of the geoelectrical inverse problem. In this paper we introduce a new formulati...

Electrical resistivity (ER) is a main parameter in the melting processes of glasses. However, its measurement is difficult at high temperatures. In this study the electrical resistivity of different cordierite glass samples in the molten state was measured in the temperature range of 1100˚C to 1550 ˚C using the two-wire method. It was attempted to decrease the electrical resistivity of the glas...

Thirty-five years ago, Gerald W. Hohmann, late Professor of Geophysics at The University of Utah, published a seminal paper on 3D electromagnetic (EM) modeling using the integral equation (IE) method. This achievement subsequently inspired a considerable body of research in 3D EM modeling and inversion. Over the decades, the IE method evolved from the academic intrigue of EM fields scattering f...

The Finite-Difference Time-Domain (FDTD) method was applied in order to analyze the transient responses of geoelectrical soundings that use circular electric dipole (CED) as source over stratified formations. The model was developed in cylindrical coordinates and a perfectly matched layer (PML) was incorporated to the domain to absorb wave reflections at computational grid boundaries. Numeric r...

An endeavour is made in the present study to identify the groundwater potential zones in the Pulang River basin, Cuddapah district based on the Geological and Geo-electrical investigations. The Geomorphological features and lineament patterns are also studied in locating favourable sites for groundwater. The Geoelectrical soundings conducted at hundred locations in the basin area are interprete...

Brunei has made significant progress in agricultural development over the past four decades. However, crop production, such as rice, is still insufficient to meet demands of growing population, mainly due scarcity water resources, acidic soils, and advancing environmental deterioration. This study conducted soil groundwater investigations at three selected rice cultivation sites Darussalam. The...

There is low resistivity contrast between reservoir zone and host formation in geothermal fields, especially in areas where the technique of water injection is being carried out. Therefore, in low contrast area, permittivity can be one of the important reservoir indicators besides resistivity. In this study, one EM tomography method of reconstructing the resistivity and permittivity from electr...