Study of flow in vadose zone from electrical resistivity surveys

Morais, Fernando de; Bacellar, Luís de Almeida Prado; Aranha, Paulo Roberto Antunes

doi:10.1590/s0102-261x2008000200001

Cited by 6 publications

(5 citation statements)

References 10 publications

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“…Many studies show the potential of electrical resistivity tomography (ERT) for hydrological investigation by means of synthetic case studies for aquifer transport characterization (Kemna et al, 2004;Vanderborght et al, 2005), imaging water flow on soil cores (Bechtold et al, 2012;Binley et al, 1996a, b;Garré et al, 2010Garré et al, , 2011Koestel et al, 2008Koestel et al, , 2009a, cross-borehole imaging of tracers (Daily et al, 1992;Oldenborger et al, 2007;Ramirez et al, 1993;Singha and Gorelick, 2005;Slater et al, 2000), or imaging of tracer injection or irrigation with surface ERT (Cassiani et al, 2006;De Morais et al, 2008;Descloitres et al, 2008a;Michot et al, 2003;Perri et al, 2012). However, some research has been conducted under natural conditions to characterize water content change, infiltration or discharge by use of cross-borehole ERT (French and Binley, 2004), surface ERT (Brunet et al, 2010;Benderitter and Schott, 1999;Descloitres et al, 2008b;Massuel et al, 2006;Miller et al, 2008) or a combined surface cross-borehole ERT array (Beff et al, 2013;Zhou et al, 2001).…”

Section: R Hübner Et Al: Monitoring Hillslope Moisture Dynamics Witmentioning

confidence: 99%

Monitoring hillslope moisture dynamics with surface ERT for enhancing spatial significance of hydrometric point measurements

Hübner¹,

Heller²,

Günther

et al. 2015

Hydrol. Earth Syst. Sci.

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Abstract. Besides floodplains, hillslopes are basic units that mainly control water movement and flow pathways within catchments of subdued mountain ranges. The structure of their shallow subsurface affects water balance, e.g. infiltration, retention, and runoff. Nevertheless, there is still a gap in the knowledge of the hydrological dynamics on hillslopes, notably due to the lack of generalization and transferability. This study presents a robust multi-method framework of electrical resistivity tomography (ERT) in addition to hydrometric point measurements, transferring hydrometric data into higher spatial scales to obtain additional patterns of distribution and dynamics of soil moisture on a hillslope. A geoelectrical monitoring in a small catchment in the eastern Ore Mountains was carried out at weekly intervals from May to December 2008 to image seasonal moisture dynamics on the hillslope scale. To link water content and electrical resistivity, the parameters of Archie's law were determined using different core samples. To optimize inversion parameters and methods, the derived spatial and temporal water content distribution was compared to tensiometer data. The results from ERT measurements show a strong correlation with the hydrometric data. The response is congruent to the soil tension data. Water content calculated from the ERT profile shows similar variations as that of water content from soil moisture sensors. Consequently, soil moisture dynamics on the hillslope scale may be determined not only by expensive invasive punctual hydrometric measurements, but also by minimally invasive time-lapse ERT, provided that pedo-/petrophysical relationships are known. Since ERT integrates larger spatial scales, a combination with hydrometric point measurements improves the understanding of the ongoing hydrological processes and better suits identification of heterogeneities.

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Section: R Hübner Et Al: Monitoring Hillslope Moisture Dynamics Witmentioning

confidence: 99%

Monitoring hillslope moisture dynamics with surface ERT for enhancing spatial significance of hydrometric point measurements

Hübner¹,

Heller²,

Günther

et al. 2015

Hydrol. Earth Syst. Sci.

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“…Diferentemente de outros autores (NEVES et al, 2003;MORAIS et al, 2007), que aplicaram a solução salina por injeção em pontos, no presente estudo ela foi aplicada em áreas. Com isto, foi possível obter respostas contínuas ao longo de um segmento da vertente, e não apenas uma informação pontual.…”

Section: Metodologiaunclassified

“…Para a obtenção do caminhamento elétrico, foram posicionados 19 eletrodos metálicos de aço inox enterrados no solo. Todas as medidas foram realizadas com o arranjo polo-polo do tipo "Cacau" (NERY et al, 1995), em que os eletrodos são dispostos no solo, ficando fixos os eletrodos extremos da linha, o "A" (corrente) e o "M" (potencial). Ao todo, foram obtidos cinco níveis de investigação (Fig.…”

Section: Geografias Artigos Científicosunclassified

Estudo da dinâmica da água infiltrada com o auxílio de método geofísico - Gouveia, Espinhaço Meridional, Minas Gerais, Brasil

2013

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Uma vez infiltrada, a água sofre influência de vários fatores da vertente, como a declividade e as características do regolito, incluindo aquelas do solo, tais como espessura dos seus horizontes, granulometria e porosidade. Dessa maneira, o entendimento do comportamento hídrico ao longo do material de subsuperfície é um aspecto importante para a análise da disponibilidade da água para plantas e também para os mecanismos envolvidos no suprimento de água para o freático. A dinâmica da água subsuperficial no solo influencia ainda a velocidade e taxas de infiltração, o que afeta diretamente o escoamento superficial, ou runoff, um dos principais processos erosivos nas áreas tropicais úmidas. Este trabalho tem por objetivo obter e analisar informações mais precisas sobre a dinâmica subsuperficial da água de infiltração em parcelas experimentais, utilizando o método geofísico Caminhamento Geoelétrico. Os experimentos foram realizados em diferentes condições iniciais de umidade. A metodologia envolveu três etapas principais: 1 – realização de perfis base de Eletrorresistividade; 2 – aplicação de uma solução aquosa condutora nos solos; 3 – obtenção de perfis após a aplicação da solução, em intervalos de tempo pré-definidos. A sequência de perfis obtidos permitiu a visualização do movimento da água em subsuperfície. Os resultados demonstram clara diferença no modo como a água infiltra nos dois diferentes tipos de solos da área, revelando também a influência da forma da vertente e ainda a eficácia da metodologia utilizada.

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“…In the Semarang Indah and Tanah Mas areas there are wells owned by the community around the river flow where the water is used for daily activities such as bathing, and washing where the well water looks muddy and is feared by heavy Pb seepage into the community wells [6]. Based on the problems that have been described above it is necessary to do further research whether or not the waste seepage, especially Pb.…”

Section: Introductionmentioning

confidence: 99%

Implementation of the AAS and Wenner Geoelectric Test to determine the Plumbum (Pb) distribution in River Border of Kanal Banjir Barat Semarang, Indonesia

Danusaputro

Suripin

Sasongko

et al. 2020

IJASRE

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The establishment of industry in the area around the Kaligarang River causes environmental pollution, one of which is a heavy metal that is suspected to occur seepage on river banks. To find out the presence of heavy metals below the surface, a Wenner Configuration Geoelectric Method and AAS (Atomic Absorption Spectrophotometry) were used to determine the Pb heavy metal seepage using wells and residents' river water samples. Geoelectric data collection and AAS Tests were carried out in Tanah Mas (A) and Semarang Indah (B) areas. In each field A (Tanah Mas) and B (Semarang Indah) geoelectric measurements were made using the Wenner method with 3 parallel lines. The result, in field A the first lane to the third lane is predicted as clay with resistivity values between 0.00844 Ωm to 15.75 Ωm at a depth of 0.5 meters to 6.91 meters. Pollutants can be predicted with a low resistivity value, for track A pollutants are identified with resistivity values between 0.00844 44m to 2.21 21m. At location B, the first to third lanes are predicted as clay with resistivity values between 0.037 Ωm to 9.68 Ωm at a depth of 0.5 meters to 6.91 meters. Pollutants at location B were identified with resistivity values between 0.037 Ωm to 2.81 Ωm. Based on the AAS test that has been carried out at 8 points of water and river sampling locations, only two locations were obtained that showed the presence of Pb heavy metals, namely residents' well water at location A, point three and river water samples at location B with a concentration value of 0.030 mg / L and 0.072 mg / L, so it can be concluded that there is no Pb heavy metal seepage in the residential area.

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Study of flow in vadose zone from electrical resistivity surveys

Cited by 6 publications

References 10 publications

Monitoring hillslope moisture dynamics with surface ERT for enhancing spatial significance of hydrometric point measurements

Monitoring hillslope moisture dynamics with surface ERT for enhancing spatial significance of hydrometric point measurements

Estudo da dinâmica da água infiltrada com o auxílio de método geofísico - Gouveia, Espinhaço Meridional, Minas Gerais, Brasil

Implementation of the AAS and Wenner Geoelectric Test to determine the Plumbum (Pb) distribution in River Border of Kanal Banjir Barat Semarang, Indonesia

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