Time‐lapse geophysical assessment of agricultural practices on soil moisture dynamics

Blanchy, Guillaume; Watts, C. W.; Richards, J. Sadler; Bussell, Jennifer; Huntenburg, Katharina; Sparkes, Debbie L.; Stalham, Mark; Hawkesford, Malcolm J.; Whalley, W. R.; Binley, Andrew

doi:10.1002/vzj2.20080

Cited by 37 publications

(26 citation statements)

References 59 publications

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“…EMI has previously been used as a proxy to estimate a variety of subsurface properties such as salinity (Cannon et al, 1994;Koganti et al, 2018), pH (Li et al, 2018), cation exchange capacity (Zare et al, 2018), and water content (Blanchy et al, 2020b;James et al, 2003;Sheets & Hendrickx, 1995;Waine, 1999), and has also been used to map sedimentary facies types (James et al, 2003;King et al, 2005;Waine, 1999;Zhao et al, 2019). Though most prior work using EMI has focused on precision agriculture (Blanchy et al, 2020b;James et al, 2003;Li et al, 2018;Zhao et al, 2019), some recent studies have used it to monitor permafrost (Minsley et al, 2012;Rey et al, 2019), characterize the subsurface along river reaches (Lane Jr et al, 2020), and to delineate freshwater-saltwater interfaces in tidal regions (Lane Jr et al, 2020). ERI has been extensively used in prior studies to understand hyporheic exchange processes (Cardenas & Markowski, 2011;Earon et al, 2020;González-Pinz on et al, 2015;Johnson et al, 2012;Slater et al, 2010;Ward et al, 2010).…”

Section: Geophysical Techniquesmentioning

confidence: 99%

Geophysical mapping of hyporheic processes controlled by sedimentary architecture within compound bar deposits

McGarr

Wallace

Ntarlagiannis

et al. 2021

Hydrological Processes

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Hyporheic exchange influences water quality and controls numerous physical, chemical, and biological processes. Despite its importance, hyporheic exchange and the associated dynamics of solute mixing are often difficult to characterize due to spatial (e.g., sedimentary heterogeneity) and temporal (e.g., river stage fluctuation) variabilities. This study coupled geophysical techniques with physical and chemical sediment analyses to map sedimentary architecture and quantify its influence on hyporheic exchange dynamics within a compound bar deposit in a gravel-dominated river system in southwestern Ohio. Electromagnetic induction (EMI) was used to quantify variability in electrical conductivity within the compound bar. EMI informed locations of electrode placement for time-lapse electrical resistivity imaging (ERI) surveys, which were used to examine changes in electrical resistivity driven by hyporheic exchange. Both geophysical methods revealed a zone of high electrical conductivity in the center of the bar, identified as a fine-grained cross-bar channel fill. The zone acts as a baffle to flow, evidenced by stable electrical conditions measured by time-lapse ERI over the study period. Large changes in electrical resistivity throughout the survey period indicate preferential flowpaths through higher permeability sands and gravels. Grain size analyses confirmed sedimentological interpretations of geophysical data. Loss on ignition and x-ray fluorescence identified zones with higher organic matter content that are locations for potentially enhanced geochemical activity within the cross-bar channel fill. Differences in the physical and geochemical characteristics of cross-bar channel fills play an important role in hyporheic flow dynamics and nutrient processing within riverbed sediments. These findings enhance our understanding of the applications of geophysical methods in mapping riverbed heterogeneity and highlight the importance of accurately representing geomorphologic features and heterogeneity when studying hyporheic exchange processes.

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Section: Geophysical Techniquesmentioning

confidence: 99%

Geophysical mapping of hyporheic processes controlled by sedimentary architecture within compound bar deposits

McGarr

Wallace

Ntarlagiannis

et al. 2021

Hydrological Processes

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“…A way forward is the use of time-lapse surveys that enables the isolation of the dynamic component of the electrical conductivity which can be related, under some circumstances, to the change in soil moisture (Blanchy et al, 2020a;Robinson et al, 2012;Martini et al, 2017). The time-lapse approach consists in subtracting a reference survey from other surveys, hence allowing the removal of the static contribution of electrical conductivity from soil texture, for example.…”

Section: Applications Of Emimentioning

confidence: 99%

Geophysical methods to assess soil characteristics

Blanchy¹,

Shield²,

Fruen³

et al. 2021

Burleigh Dodds Series in Agricultural Science

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This chapter explores the use of geophysical methods to assess soil physical characteristics. The chapter begins by reviewing the geophysical properties of soil, such as clay content and organic matter content. It then moves on to discuss the electromagnetic induction method and its application, then examines electrical resistivity and its application. Acoustic-to-seismic coupling is also reviewed in terms of creating a model and its application. The chapter concludes by providing an overview of the several geophysical methods that can be used to measure various characteristics of agricultural soils.

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“…In the last 20 years, more than 200 papers have been published on ISI journals (Figure 1). The TL-ERT method found an impressive number of applications crossing different disciplines, from hydrogeology [9][10][11][12] to agriculture [13][14][15][16], from engineering geology [17][18][19][20] to geohazards [21][22][23][24], from CO2 storage [25] to the study of the effects of the climate changes on soil and near subsurface [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Time-Lapse Electrical Resistivity Tomography (TL-ERT) for Landslide Monitoring: Recent Advances and Future Directions

Lapenna

Perrone

2022

Applied Sciences

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To date, there is a growing interest for challenging applications of time-lapse electrical resistivity tomography (TL-ERT) in Earth sciences. Tomographic algorithms for resistivity data inversion and innovative technologies for sensor networks have rapidly transformed the TL-ERT method in a powerful tool for the geophysical time-lapse imaging. In this paper, we focus our attention on the application of this method in landslide monitoring. Firstly, an overview of recent methodological advances in TL-ERT data processing and inversion is presented. In a second step, a critical analysis of the main results obtained in different field experiments and lab-scale simulations are discussed. The TL-ERT appears to be a robust and cost-effective method for mapping the water-saturated zones, and for the identification of the groundwater preferential pathways in landslide bodies. Furthermore, it can make a valuable contribution to following time-dependent changes in top-soil moisture, and the spatio-temporal dynamics of wetting fronts during extreme rainfall events. The critical review emphasizes the limits and the advantages of this geophysical method and discloses a way to identify future research activities to improve the use of the TL-ERT method in landslide monitoring.

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Time‐lapse geophysical assessment of agricultural practices on soil moisture dynamics

Cited by 37 publications

References 59 publications

Geophysical mapping of hyporheic processes controlled by sedimentary architecture within compound bar deposits

Geophysical mapping of hyporheic processes controlled by sedimentary architecture within compound bar deposits

Geophysical methods to assess soil characteristics

Time-Lapse Electrical Resistivity Tomography (TL-ERT) for Landslide Monitoring: Recent Advances and Future Directions

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