B-scan wave outline analysis in numerical modeling of ground-penetrating radar response from layered rough interfaces

2019 ◽  
Vol 61 (3) ◽  
pp. 832-837 ◽  
Author(s):  
Ying Liu ◽  
Li-Xin Guo
Keyword(s):  
Numerical Modeling ◽  
Ground Penetrating Radar ◽  
Outline Analysis ◽  
Rough Interfaces ◽  
Ground Penetrating

Effect of antennas on velocity estimates obtained from crosshole GPR data

Geophysics ◽  
2005 ◽  
Vol 70 (5) ◽  
pp. K39-K42 ◽  
Author(s):  
James D. Irving ◽  
Rosemary J. Knight
Keyword(s):  
Numerical Modeling ◽  
Ground Penetrating Radar ◽  
Significant Fraction ◽  
High Angle ◽  
Standard Assumption ◽  
Tomographic Images ◽  
Wide Range ◽  
Antenna Length ◽  
Ground Penetrating

To obtain tomographic images with the highest possible resolution from crosshole ground-penetrating radar (GPR) data, raypaths covering a wide range of angles between the boreholes are required. In practice, however, the inclusion of high-angle ray data in crosshole GPR inversions often leads to tomograms so dominated by inversion artifacts that they contain little reliable subsurface information. Here, we investigate the problems that arise from the standard assumption that all first-arriving energy travels directly between the centers of the antennas. Through numerical modeling, we show that this assumption is often incorrect at high transmitter-receiver angles and can lead to significant errors in tomographic velocity estimates when the antenna length is a significant fraction of the borehole spacing.

Ancient Stone Bridge Surveying by Ground-Penetrating Radar and Numerical Modeling Methods

2014 ◽  
Vol 19 (1) ◽  
pp. 110-119 ◽  
Author(s):  
Mercedes Solla ◽  
Belén Riveiro ◽  
Henrique Lorenzo ◽  
Julia Armesto
Keyword(s):  
Numerical Modeling ◽  
Ground Penetrating Radar ◽  
Modeling Methods ◽  
Ground Penetrating

scholarly journals Using ground-penetrating radar, topography and classification of vegetation to model the sediment and active layer thickness in a periglacial lake catchment, western Greenland

2016 ◽  
Vol 8 (2) ◽  
pp. 663-677 ◽  
Author(s):  
Johannes Petrone ◽  
Gustav Sohlenius ◽  
Emma Johansson ◽  
Tobias Lindborg ◽  
Jens-Ove Näslund ◽  
...  
Keyword(s):  
Numerical Modeling ◽  
Layer Thickness ◽  
Active Layer ◽  
Ground Penetrating Radar ◽  
Vegetation Classification ◽  
Active Layer Thickness ◽  
Sediment Thickness ◽  
Catchment Scale ◽  
Scale Models ◽  
Ground Penetrating

Abstract. The geometries of a catchment constitute the basis for distributed physically based numerical modeling of different geoscientific disciplines. In this paper results from ground-penetrating radar (GPR) measurements, in terms of a 3-D model of total sediment thickness and active layer thickness in a periglacial catchment in western Greenland, are presented. Using the topography, the thickness and distribution of sediments are calculated. Vegetation classification and GPR measurements are used to scale active layer thickness from local measurements to catchment-scale models. Annual maximum active layer thickness varies from 0.3 m in wetlands to 2.0 m in barren areas and areas of exposed bedrock. Maximum sediment thickness is estimated to be 12.3 m in the major valleys of the catchment. A method to correlate surface vegetation with active layer thickness is also presented. By using relatively simple methods, such as probing and vegetation classification, it is possible to upscale local point measurements to catchment-scale models, in areas where the upper subsurface is relatively homogeneous. The resulting spatial model of active layer thickness can be used in combination with the sediment model as a geometrical input to further studies of subsurface mass transport and hydrological flow paths in the periglacial catchment through numerical modeling. The data set is available for all users via the PANGAEA database, doi:10.1594/PANGAEA.845258.

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