Modeling soil magnetic susceptibility and frequency-dependent susceptibility to aid landmine clearance.

Jacqueline A. Hannam; John A. Dearing

doi:10.1117/12.663601

16 May 2006 Modeling soil magnetic susceptibility and frequency-dependent susceptibility to aid landmine clearance.

Jacqueline A. Hannam, John A. Dearing

Proceedings Volume 6217, Detection and Remediation Technologies for Mines and Minelike Targets XI; 62170M (2006) https://doi.org/10.1117/12.663601
Event: Defense and Security Symposium, 2006, Orlando (Kissimmee), Florida, United States

Abstract

Information on the electromagnetic properties of soils and their effects on metal detectors is increasingly necessary for effective demining due to limited detector efficacy in highly magnetic soils and the difficulty of detecting minimummetal mines. Magnetic measurements of soils, such as magnetic susceptibility and frequency dependent susceptibility can aid the detection of problem soils, but are not part of standard soil analyses. Consequently, little information about soil magnetism exists within the soil, environmental science and environmental geophysics communities. Lack of empirical data may be compensated through the estimation of soil magnetic characteristics by predictive modeling approaches. Initial modeling of soil types in Bosnia and Herzegovina (BiH) was attempted by expert and analogue approaches, using only coarse scale soil type information, which resulted in the production of national soil maps for low field and frequency-dependent susceptibility. Validation of the maps was achieved by comparison of empirical magnetic data from soil samples in the National Bosnian soil archive in Sarajevo. Discrepancies between the model and empirical data are explained in part by the differences in soil parent material within each soil type, which controls the amount of Fe released into the soil system available for in situ conversion to magnetic Fe oxides. The integration of soil information (type and parent material), expert knowledge and empirical data refines the predictive modeling of soil magnetic characteristics in temperate-Mediterranean environments such as BiH. Further spatial separation of soil types in the landscape can be achieved by digital terrain modeling. Preliminary fine-scale, landscape-soil modeling indicates improved spatial resolution of soil types compared with the original coarsely-mapped soil units, and the potential to synthesize local scale soil magnetic maps.

Citation Download Citation

Jacqueline A. Hannam and John A. Dearing "Modeling soil magnetic susceptibility and frequency-dependent susceptibility to aid landmine clearance.", Proc. SPIE 6217, Detection and Remediation Technologies for Mines and Minelike Targets XI, 62170M (16 May 2006); https://doi.org/10.1117/12.663601

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