Home > Publications database > Measuring vertical soil water content profiles by combining horizontal borehole and dispersive surface ground penetrating radar data > print |
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024 | 7 | _ | |a 10.1002/nsg.12099 |2 doi |
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024 | 7 | _ | |a 1873-0604 |2 ISSN |
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100 | 1 | _ | |a Yu, Yi |0 P:(DE-Juel1)171895 |b 0 |e Corresponding author |
245 | _ | _ | |a Measuring vertical soil water content profiles by combining horizontal borehole and dispersive surface ground penetrating radar data |
260 | _ | _ | |a Houten |c 2020 |b EAGE |
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520 | _ | _ | |a To investigate transient dynamics of soil water redistribution during infiltration, we conducted horizontal borehole and surface ground penetrating radar measurements during a 4‐day infiltration experiment at the rhizontron facility in Selhausen, Germany. Zero‐offset ground penetrating radar profiling in horizontal boreholes was used to obtain soil water content information at specific depths (0.2, 0.4, 0.6, 0.8 and 1.2 m). However, horizontal borehole ground penetrating radar measurements do not provide accurate soil water content estimates of the top soil (0–0.1 m depth) because of interference between direct and critically refracted waves. Therefore, surface ground penetrating radar data were additionally acquired to estimate soil water content of the top soil. Due to the generation of electromagnetic waveguides in the top soil caused by infiltration, a strong dispersion in the ground penetrating radar data was observed in 500 MHz surface ground penetrating radar data. A dispersion inversion was thus performed with these surface ground penetrating radar data to obtain soil water content information for the top 0.1 m of the soil. By combining the complementary borehole and surface ground penetrating radar data, vertical soil water content profiles were obtained, which were used to investigate vertical soil water redistribution. Reasonable consistency was found between the ground penetrating radar results and independent soil water content data derived from time domain reflectometry measurements. Because of the improved spatial representativeness of the ground penetrating radar measurements, the soil water content profiles obtained by ground penetrating radar better matched the known water storage changes during the infiltration experiment. It was concluded that the combined use of borehole and surface ground penetrating radar data convincingly revealed spatiotemporal soil water content variation during infiltration. In addition, this setup allowed a better quantification of water storage, which is a prerequisite for future applications, where, for example, the soil hydraulic properties will be estimated from ground penetrating radar data. |
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773 | _ | _ | |a 10.1002/nsg.12099 |g p. nsg.12099 |0 PERI:(DE-600)2247665-9 |n 3 |p 275-294 |t Near surface geophysics |v 18 |y 2020 |x 1873-0604 |
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