Comparison between the Hydraulic Properties of Two Low-permeability Alluvial Systems Supported by Geophysical Methods

2013 ◽  
Author(s):  
A. Guinea ◽  
W. Timms ◽  
I. Acworth
Keyword(s):  
Hydraulic Properties ◽  
Geophysical Methods ◽  
Low Permeability

scholarly journals Borehole measurement of the hydraulic properties of low-permeability rock

1997 ◽  
Vol 33 (11) ◽  
pp. 2509-2517 ◽  
Author(s):  
Kentner S. Novakowski ◽  
Gregory S. Bickerton
Keyword(s):  
Hydraulic Properties ◽  
Low Permeability

scholarly journals Hydrogeophysical Assessment of the Critical Zone below a Golf Course Irrigated with Reclaimed Water close to Volcanic Caldera

Water ◽  
2021 ◽  
Vol 13 (17) ◽  
pp. 2400
Author(s):  
Alex Sendrós ◽  
Mahjoub Himi ◽  
Esmeralda Estévez ◽  
Raúl Lovera ◽  
M. Pino Palacios-Diaz ◽  
...  
Keyword(s):  
Electrical Resistivity ◽  
Hydraulic Properties ◽  
Electrical Resistivity Tomography ◽  
Reclaimed Water ◽  
Geophysical Methods ◽  
Water Infiltration ◽  
Golf Course ◽  
Pyroclastic Deposits ◽  
Undisturbed Soil ◽  
Resistivity Tomography

The geometry and the hydraulic properties of the unsaturated zone is often difficult to evaluate from traditional soil sampling techniques. Soil samples typically provide only data of the upper layers and boreholes are expensive and only provide spotted information. Non-destructive geophysical methods and among them, electrical resistivity tomography can be applied in complex geological environments such as volcanic areas, where lavas and unconsolidated pyroclastic deposits dominate. They have a wide variability of hydraulic properties due to textural characteristics and modification processes suh as compaction, fracturation and weathering. To characterize the subsurface geology below the golf course of Bandama (Gran Canaria) a detailed electrical resistivity tomography survey has been conducted. This technique allowed us to define the geometry of the geological formations because of their high electrical resistivity contrasts. Subsequently, undisturbed soil and pyroclastic deposits samples were taken in representative outcrops for quantifying the hydraulic conductivity in the laboratory where the parametric electrical resistivity was measured in the field. A statistical correlation between the two variables has been obtained and a 3D model transit time of water infiltration through the vadose zone has been built to assess the vulnerability of the aquifers located below the golf course irrigated with reclaimed water.

scholarly journals Efficient estimation of effective hydraulic properties of stratal undulating surface layer using time-lapse multi-channel GPR

2019 ◽  
Vol 23 (9) ◽  
pp. 3653-3663 ◽  
Author(s):  
Xicai Pan ◽  
Stefan Jaumann ◽  
Jiabao Zhang ◽  
Kurt Roth
Keyword(s):  
Surface Layer ◽  
Soil Water ◽  
Hydraulic Properties ◽  
Geophysical Methods ◽  
Time Lapse ◽  
Quantitative Information ◽  
Depositional Environments ◽  
Efficient Estimation ◽  
Soil Water Storage ◽  
Shallow Subsurface

Abstract. Multi-scale soil architectures in shallow subsurface are widespread in natural and anthropogenic depositional environments, and acquisition of the surface stratal structure and hydrological properties are essential in quantifying water cycling. Geophysical methods like ground-penetrating radar (GPR) can provide quantitative information like soil architecture and spatiotemporal soil water content distribution for the shallow layer. Concerning the informative multi-dimensional water flow in the surface layer with an undulating bottom at the plot scale, this study assesses the feasibility of efficiently estimating soil hydraulic properties using a few time-lapse multi-channel GPR observations, namely soil water storage and layer thickness of the surface layer, at reclamation land near an old river channel. We show that effective hydraulic properties of the surface layer can be obtained with a small number of time-lapse GPR measurements during a rainfall event. Additionally, we analyze the effect of some key factors controlling the informative lateral water redistribution on the results of the proposed approach using synthetic simulations.

scholarly journals On determining uncertainties of magnetic resonance sounding estimated transmissivities for groundwater modeling

Geophysics ◽  
2016 ◽  
Vol 81 (4) ◽  
pp. WB63-WB73 ◽  
Author(s):  
Troels Norvin Vilhelmsen ◽  
Steen Christensen ◽  
Esben Auken
Keyword(s):  
Magnetic Resonance ◽  
Hydraulic Properties ◽  
Groundwater Modeling ◽  
Hydrological Modeling ◽  
Geophysical Methods ◽  
Correlation Factor ◽  
Data Sets ◽  
Nonlinear Method ◽  
Estimated Parameters ◽  
Magnetic Resonance Sounding

The nuclear magnetic resonance sounding (MRS) method is used increasingly as a tool for hydrological investigations. Compared to other geophysical methods, the advantage of MRS is that it is directly sensitive to the presence of water in the subsurface. Data interpretations can also be used to get information about the subsurface pore structures, which under special conditions can be related to hydraulic properties such as aquifer transmissivity. However, to broaden the usage of this information in hydrological modeling, the uncertainties related to these transmissivity estimates must be determined. Otherwise, properly balanced weights cannot be given to the prior information obtained from MRS transmissivity estimates as compared to the hydrological data sets when used for groundwater model calibration. We have developed a methodology to estimate the uncertainties of MRS-based transmissivity estimates. Compared to previous studies, the methodology is well defined, and it takes into account important factors such as the uncertainties of the hydraulically estimated transmissivities, the uncertainty of the correlation factor in the petrophysical relation, and the uncertainties and correlations of the geophysically estimated parameters. We have determined the correlations and uncertainties of the geophysical parameters using a linear and a nonlinear method, and we find that the results are comparable.

scholarly journals Efficient estimation of effective hydraulic properties of stratal undulating surface layer using time-lapse multi-channel GPR

2019 ◽  
Author(s):  
Xicai Pan ◽  
Stefan Jaumann ◽  
Jiabao Zhang ◽  
Kurt Roth
Keyword(s):  
Surface Layer ◽  
Soil Water ◽  
Hydraulic Properties ◽  
Geophysical Methods ◽  
Time Lapse ◽  
Quantitative Information ◽  
Depositional Environments ◽  
Efficient Estimation ◽  
Soil Water Storage ◽  
Shallow Subsurface

Abstract. Multi-scale soil architectures in shallow subsurface are widespread in natural and anthropogenic depositional environments, acquisition of the surface stratal structure and hydrological properties are essential to quantify water cycling. Geophysical methods like Ground-Penetrating Radar (GPR) can provide quantitative information like soil architecture and spatiotemporal soil water content distribution for the shallow layer. Concerning the informative multi-dimensional water flow in the surface layer with an undulating bottom at plot scale, this study assesses the feasibility of efficiently estimating soil hydraulic properties using a few time-lapse multi-channel GPR observations, namely soil water storage and layer thickness of the surface layer at a reclamation land near an old river channel. We show that effective hydraulic properties of the surface layer can be obtained with a small number of time-lapse GPR measurements during a rainfall event. Additionally, we analyze the effect of some key factors controlling the informative lateral water redistribution on the results of the proposed approach using synthetic simulations.

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