High resolution magnetic survey for soil monitoring: detection of drainage and soil tillage effects

Mathé, Vivien; Lévèque, François

doi:10.1016/s0012-821x(03)00241-3

Cited by 46 publications

(23 citation statements)

References 18 publications

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“…In the studied case (Mathé and Lévêque, 2003), the PG amplitude (about 2 nT) was only about one order higher than the specified instrumental sensitivity; hence, the noise level of battery, sensors and digitizers had to be evaluated. The instrumental limits were estimated from data collected in base-station mode, i.e., with no location change.…”

Section: Instrumental Limitsmentioning

confidence: 99%

“…As shown in laboratory (Jolivet et al, 2000), grain-size of neoformed phases is also a function of pH and Eh conditions. In soils, pH is more particularly controlled by acid-base equilibria and CO 2 partial pressure, while Eh primarily depends on the abundance of electron donors/acceptors, organic matter, iron and manganese oxides and air oxygen accessibility (i.e., soil aeration; see discussion in Mathé and Lévêque, 2003). Consequently, magnetic minerals can be considered as micro-tracers of soil properties.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, they offer a rapid acquisition process allowing rapid decimetricresolution mapping. The interest of this method was already underlined in clayey soil cases, in Western France marshlands (Mathé and Lévêque, 2003). This hydromorphic soil type, known to be poorly magnetized, may have weak magnetic anomalies (Mathé and Lévêque, 2003).…”

Section: Introductionmentioning

confidence: 99%

“…The interest of this method was already underlined in clayey soil cases, in Western France marshlands (Mathé and Lévêque, 2003). This hydromorphic soil type, known to be poorly magnetized, may have weak magnetic anomalies (Mathé and Lévêque, 2003). For non-polluted soils, magnetic anomalies may reach a maximum of a few nanoteslas only.…”

Section: Introductionmentioning

confidence: 99%

“…

Caesium magnetometers are new tools for soil property mapping with a decimetric resolution [Mathé, V., Lévêque, F., 2003. High resolution magnetic survey for soil monitoring: detection of drainage and soil tillage effects.

…”

mentioning

confidence: 99%

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Soil anomaly mapping using a caesium magnetometer: Limits in the low magnetic amplitude case

Mathé¹,

Lévèque²,

Mathé

et al. 2006

Journal of Applied Geophysics

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Section: Instrumental Limitsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…

…”

mentioning

confidence: 99%

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Soil anomaly mapping using a caesium magnetometer: Limits in the low magnetic amplitude case

Mathé¹,

Lévèque²,

Mathé

et al. 2006

Journal of Applied Geophysics

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Data processing chain for high spatial resolution magnetic survey: Application on the Neolithic site of le Pontet (Charente‐maritime, France)

Bruniaux

Mathé

Lévèque

et al. 2017

Archaeological Prospection

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This article focusses on an original magnetic survey protocol and its data processing chain. The use of a high sensitive magnetometer combined with a motorized total station permits production of a magnetic map with a high spatial resolution and a high precision of magnetic and positional measurements. The data processing enhances the final magnetic map by the removal and restoring the outlier values, measurement errors and magnetic disturbances. The magnetic survey was undertaken on the Neolithic site of Le Pontet at Saint-Nazaire-sur-Charente (French Atlantic coast, between Bordeaux and La Rochelle). The site was chosen for geographical and archaeological characteristics such as its settlement period, the topography and the presence of different magnetic disturbances (proximity to roads and residential area). The data processing is mainly made on ungridded data and the gridding is the second to last step. The last step is to correct the relative height variation of the sensors between the prospecting lines (tracks) induced by the topography and operators. The use of a motorized total station allows accurate height determination of the sensors and an upward continuation is performed to correct the slight magnetic intensity variation induced by the relative height variation of the sensors. The results of the magnetic map bring out several causewayed enclosures, pits and postholes. This map will serve as a working basis for interdisciplinary studies and future archaeological studies of this site.

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Advancing process‐based watershed hydrological research using near‐surface geophysics: a vision for, and review of, electrical and magnetic geophysical methods

Robinson

Binley

Crook

et al. 2008

Hydrological Processes

242

169

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Abstract:We want to develop a dialogue between geophysicists and hydrologists interested in synergistically advancing process based watershed research. We identify recent advances in geophysical instrumentation, and provide a vision for the use of electrical and magnetic geophysical instrumentation in watershed scale hydrology. The focus of the paper is to identify instrumentation that could significantly advance this vision for geophysics and hydrology during the next 3-5 years. We acknowledge that this is one of a number of possible ways forward and seek only to offer a relatively narrow and achievable vision. The vision focuses on the measurement of geological structure and identification of flow paths using electrical and magnetic methods. The paper identifies instruments, provides examples of their use, and describes how synergy between measurement and modelling could be achieved. Of specific interest are the airborne systems that can cover large areas and are appropriate for watershed studies. Although airborne geophysics has been around for some time, only in the last few years have systems designed exclusively for hydrological applications begun to emerge. These systems, such as airborne electromagnetic (EM) and transient electromagnetic (TEM), could revolutionize hydrogeological interpretations. Our vision centers on developing nested and cross scale electrical and magnetic measurements that can be used to construct a three-dimensional (3D) electrical or magnetic model of the subsurface in watersheds. The methodological framework assumes a 'top down' approach using airborne methods to identify the large scale, dominant architecture of the subsurface. We recognize that the integration of geophysical measurement methods, and data, into watershed process characterization and modelling can only be achieved through dialogue. Especially, through the development of partnerships between geophysicists and hydrologists, partnerships that explore how the application of geophysics can answer critical hydrological science questions, and conversely provide an understanding of the limitations of geophysical measurements and interpretation.

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High resolution magnetic survey for soil monitoring: detection of drainage and soil tillage effects

Cited by 46 publications

References 18 publications

Soil anomaly mapping using a caesium magnetometer: Limits in the low magnetic amplitude case

Soil anomaly mapping using a caesium magnetometer: Limits in the low magnetic amplitude case

Data processing chain for high spatial resolution magnetic survey: Application on the Neolithic site of le Pontet (Charente‐maritime, France)

Advancing process‐based watershed hydrological research using near‐surface geophysics: a vision for, and review of, electrical and magnetic geophysical methods

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