.... Borehole NMR surveys conducted in Aug 2018 indicate that volumetric water contents in the bedrock vadose zone range from 0.18-0.26 spatially. Resistivity profiles indicate a continuous 1.5-4.5 m thick resistive zone near the surface that may represent a decline in water content and/or increase in porosity...

...Case study for estimating water content from multi-offset GPR data using CRS method Jeong-Ryul Choi and Seung-Sep Kim, Chungnam National University; Young-Jin Kim, FS Inc Summary Ground penetrating radar (GPR) exploration is one of the most popular methods to conduct geotechnical investigation...

... Zone Journal , 15 , 1 – 13 , 10.2136/vzj2016.05.0043 . Galagedara , L. W. , G. W. Parkin , J. D. Redman , and A. L. Endres , 2002 , Temporal and spatial variation of soil water content measured by borehole GPR under irrigation and drainage : Ninth...

... Summary Ground-penetrating radar (GPR) is a commonly used tool for estimating volumetric water content of soils. Given the similar dielectric properties of soil and wood, GPR can also be used to estimate volumetric water content of living tree trunks, which is a difficult measure to make...

... inversion scheme geophysics forward model correspond water content annual meeting full bloch equation Behroozmand , A. A. , E. Dalgaard , A. V. Christiansen , and E. Auken , 2013 , A comprehensive study of parameter determination in a joint MRS and TEM data...

...) has advanced capabilities for in-situ monitoring of water content in the near-surface. Here, we investigate the NMR response to water content changes in weathered and fractured bedrock in response to a rising and falling seasonal groundwater table. Theory The NMR measurement of a water-saturated...

...:45 AM Location: 370C Presentation Type: ORAL information resistivity value rain season landslide water content time-lapse electrical resistivity tomography serbia seg seg international exposition investigation annual meeting electrical resistivity tomography ert landslide...

... cholera outbreak exploration jerome catholic university software moungo aquifer douala tdem health & medicine water content prevention african graduate student douala cameroon exploration cameroon groundwater undergraduate student reservoir characterization university...

... Summary Organic rich gas shales are often composed of thin laminated structures and, thus, may be considered transversely isotropic media. Shale anisotropy properties are affected by many factors, including confining pressure, water content, total organic content (TOC), mineralogy...

... Summary Along with pure clay minerals, preserved shale cores from two boreholes have been characterised in terms of mineralogy, cation exchange capacity, specific surface area, water content and dielectric response. Pure clay powders in both room-dry and paste states show mineralogy dependent...

... to be monitored. The amplitude of the magnetization is related to water content, and the characteristics of the return to equilibrium can reveal information about the pore-size and permeability (Seevers, 1966; Kenyon et al., 1988). The TEM method also employs the use of a surface coil, where a strong...

... conductivity clay-rich shale carbonate-rich shale room condition porosity powder marl characterization water content laboratory characterization well logging shale upstream oil & gas multi-physic laboratory characterization log analysis resistivity carbonate-rich rock multi...

... on the volumetric water content of a porous medium. In this study, we examine time domain electromagnetic (TEM) methods for monitoring water infiltration into an initially dry soil and subsequent drainage of the wetting front with time at a recharge basin near Tucson, Arizona. Results suggest an impermeable clay...

... procedure traveltime data binley gpr data stochastic inversion different infiltration case water resource research water content upstream oil & gas reservoir characterization reservoir simulation infiltration case infiltration condition equation artificial intelligence machine learning...

... behaviors in the vadose zone. infiltration grasmueck experiment water content ground-penetrating radar upstream oil & gas reservoir characterization diffraction information front reflection experiment time main menu irrigation tank subsurface gpr interface grid sand reflection...

... ABSTRACT The volumetric water content (?) of peat soils below the water table is largely controlled by the production of biogenic methane-rich gas bubbles that are subsequently released to the atmosphere, thereby having significant implications for carbon cycling. Geophysical methods have...

... at describing their mineralogical and water content, their porosity and rock physics signature, as well as their geomechanical properties. Despite their chronological proximity and common geological history, the two formations show marked differences in their overall petrophysical and geomechanical behaviour...

... seg seg denver 2010 amplitude transmitter receiver loop geochemical exploration highest initial amplitude magnetic resonance configuration upstream oil & gas magnetic field artificial intelligence water content reservoir characterization signal response characteristic...

... where the flux was controlled with a peristaltic pump. Shifts in the radar arrivals are evident early in the experiment and progress as water content increases. Changes in velocities can be seen on both position vs. time (multi-offset) and travel time vs. experiment time (single offset) plots...

... and corresponding shear wave and radar wave velocity profiles. Seismic surface wave velocities are sensitive to soil shear strength whereas radar velocities are related to soil volumetric water content. Joint use of the two methods provided complementary information about lithology and soil water content...