Use of mineral magnetic measurements to investigate soil erosion and sediment delivery in a small agricultural catchment in limestone terrain

Royall, Dan

doi:10.1016/s0341-8162(01)00155-2

Cited by 68 publications

(31 citation statements)

References 13 publications

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“…The mapping of the MS has stood out as one of the more indirect methods used for agricultural studies (SIQUEIRA et al, 2010b) and environmental characterization (GRIMLEY et al, 2004). Some studies reported the relation between MS and the loss of soil by erosion (HANESCH & SCHOLGER, 2005;VENTURA JR. et al, 2001;PARSONS et al, 2010) and the identification of areas with different erosion potentials (ROYALL, 2001) .…”

Section: Introductionmentioning

confidence: 99%

Erosion factors and magnetic susceptibility in differet compartments of a slope in Gilbués-PI, Brazil

et al. 2013

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ABSTRACT:The erosion is the degradation of soil with effects on crop productivity and pollution of the environment. To understand the spatial variability of this phenomenon, geostatistical techniques and concepts of soil-landscape can be used to identify landscape compartments with different potential of erosion. The aim of this study was to understand the factors of erosion in landscape compartments and the relations with the magnetic susceptibility (MS) of the soils in a slope in Gilbués, state of Piauí (PI), Brazil. Sampling meshes were set in compartments I and II with 121 points and in compartment III with 99 points spaced every 10 meters. There was significant difference to erodibility (K) and risk of erosion (RE); the spatial variability of MS was lower than the factors of soil erosion. The soil losses (A), the natural erosion potential (NEP), the RE and the MS had spatial relation with the topographic factor, indicating dependence of the erosion with the relief. We concluded that losses of soil, natural erosion potential and risk of erosion have spatial relation with the topographic factor, showing the dependence of the erosion factors with the relief. The soil magnetic susceptibility can be used as an auxiliary variable in the indirect quantification of the erodibility factor and the risk of soil erosion.KEYWORDS: indirect quantification, geostatistics, conservation planning, compartments, topography, relief, landscape. FATORES DE EROSÃO E SUSCETIBILIDADE MAGNÉTICA EM DIFERENTES COMPARTIMENTOS DE UMA VERTENTE DO MUNICÍPIO DE GILBUÉS-PI RESUMO:A erosão é a forma de degradação do solo com efeitos na produtividade das culturas e na poluição do meio ambiente. Para compreender a variabilidade espacial desse fenômeno, técnicas geoestatísticas e conceitos da relação solo-paisagem podem ser utilizados para identificar compartimentos da paisagem com diferentes potenciais de erosão. O objetivo deste trabalho foi estabelecer elementos para a compreensão dos fatores de erosão em compartimentos da paisagem e das relações com a suscetibilidade magnética (SM) dos solos de uma vertente no município de Gilbués -PI. Foram montadas malhas de amostragem nos compartimentos I e II, com 121 pontos, e compartimento III, com 99 pontos, espaçados a cada 10 m. Houve diferença significativa para erodibilidade (K) e risco de erosão (RE); a variabilidade espacial da SM foi menor do que a dos fatores de erosão do solo. As perdas de solo (A), potencial natural de erosão (PNE), RE e SM tiveram relação espacial com o fator topográfico, indicando dependência da erosão ao relevo. Concluiu-se que as perdas de solo, o potencial natural de erosão e o risco de erosão apresentaram relação espacial com o fator topográfico, comprovando a dependência dos fatores de erosão ao relevo. A suscetibilidade magnética do solo pode ser utilizada como variável auxiliar na quantificação indireta do fator erodibilidade e do risco de erosão do solo.

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Section: Introductionmentioning

confidence: 99%

Erosion factors and magnetic susceptibility in differet compartments of a slope in Gilbués-PI, Brazil

et al. 2013

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“…The magnetic susceptibility of soils has the potential to provide information on the specifi c areas where soils are most degraded and are, therefore, at the greatest risk of suffering erosion. In addition, to investigate soil erosion and sediment delivery in an agricultural catchment, Royall (2001) used magnetic measurements.…”

Section: Introductionmentioning

confidence: 99%

Using magnetic susceptibility to assess soil degradation in the Eastern Rif, Morocco

Sadiki¹,

Faleh

Izquierdo

et al. 2009

Earth Surf Processes Landf

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The soil in the Rif, Morocco, is at serious risk because increasing anthropogenic pressures are gradually transforming large natural areas into farmland. The distribution of magnetic minerals within the soil profi le can be used to assess soil development and degradation. The soils in the study area are severely eroded because of a combination of highly erodible soils, intense rainstorms and scarce vegetation cover. To sample of representative soil profi les, lithology, slope gradient and land use were considered. The ranges of magnetic susceptibility in the soil profi les distinguished between two primary soil groups. Magnetic susceptibility varied in the soil profi le and along the soil toposequence, and the variations were related to the differences in the original magnetic composition and the infl uence of main erosion factors. Lithology is the main factor contributing to the variation in magnetic susceptibility. The magnetic susceptibility values in soils on Tertiary marls (χ = 13·5 × 10 −8 m 3 kg) differed significantly from those on Quaternary terraces (χ = 122·1 × 10 −8 m 3 kg −1). Slope affected the distribution of magnetic susceptibility because of the continuous loss of topsoil in some parts of the slope and the deposition of eroded soil in others. Elimination of the natural vegetation cover and a shift to cultivated land for cereals has had a negative impact on soil development and, on similar slopes and substrates, magnetic susceptibility decreased signifi cantly in cultivated soils. The soils on steep slopes that had natural vegetation cover retained the magnetic minerals better than did those on gentler slopes that were under cultivation. Grazing, clearing and, especially, tilling has weakened the soil and made it much more vulnerable to erosion. An analysis of the main factors causing erosion will help to promote rational use of the land and to establish conservation strategies in such fragile agroecosystems.

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“…Sadiki et al (2009) applied magnetic susceptibility for soil degradation identification as well as for tracing the sources of sediments that are contributing increasingly larger sediment loads to the drainage network. Royall (2001) made use of mineral magnetic measurements to investigate soil erosion and sediment delivery in a small agricultural catchment in a limestone terrain. By using magnetic susceptibility, the rate of soil erosion can be estimated for a given period of agricultural land use ( Jordanova et al 2011( Jordanova et al , 2014.…”

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confidence: 99%

Using magnetic susceptibility mapping for assessing soil degradation due to water erosion

Jakšík¹,

Kodešová²,

Kapička³

et al. 2016

Soil & Water Res.

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Jakšík O., Kodešová R., Kapička A., Klement A., Fér M., Nikodem A. (2016): Using magnetic susceptibility mapping for assessing soil degradation due to water erosion. Soil & Water Res., This study focused on developing a method for estimating topsoil organic carbon content from measured massspecific magnetic susceptibility in Chernozems heavily affected by water erosion. The study was performed on a 100 ha area, whereby 202 soil samples were taken. A set of soil samples was divided into 3 subsets: A (32 samples), B (67 samples), and C (103 samples). The mass-specific magnetic susceptibility using low (χ lf ) and high (χ hf ) frequency, and organic carbon content were measured at all soil samples. The contents of iron and manganese, extracted with a dithionite-citrate solution (Fe d , Mn d ) and ammonium oxalate (Fe o , Mn o ), were quantified in A and B samples. Models for predicting organic carbon content from magnetic susceptibilities were designed as follows: (1) subset A was used as the training set for calibration, and subsets B and C were used as the test sets for model validation, either separately (subset B only), or together (merged subsets B and C); (2) merged subsets A and B were used as the training set and subset C was used as the test set. Results showed very close correlations between organic carbon content and all measured soil properties. Obtained models relating organic carbon content to mass-specific magnetic susceptibility successfully predicted soil organic carbon contents.

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Use of mineral magnetic measurements to investigate soil erosion and sediment delivery in a small agricultural catchment in limestone terrain

Cited by 68 publications

References 13 publications

Erosion factors and magnetic susceptibility in differet compartments of a slope in Gilbués-PI, Brazil

Erosion factors and magnetic susceptibility in differet compartments of a slope in Gilbués-PI, Brazil

Using magnetic susceptibility to assess soil degradation in the Eastern Rif, Morocco

Using magnetic susceptibility mapping for assessing soil degradation due to water erosion

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