Spatial variations in soil hydraulic conductivity in a Guarani Aquifer System recharge area

Detalhes bibliográficos
Autor(a) principal: Rocha, Rodrigo Esteves [UNESP]
Data de Publicação: 2019
Outros Autores: Gastmans, Didier [UNESP], Sacchi, Marcelo Donadelli [UNESP], De Oliveira, Marcelo Dias [UNESP]
Tipo de documento: Artigo
Idioma: por
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.33958/revig.v40i2.646
http://hdl.handle.net/11449/199681
Resumo: Data on the hydraulic conductivity of soils are important for the understanding of water infiltration processes, and contribute to reduce uncertainties in water balance estimation in watersheds. These data not only allow a better understanding of the spatial distribution of recharge rates in unconfined aquifers, but also are used to develop strategies for the rational and integrated use of surface water and groundwater. In this regard, the objective of this study was to determine the spatial variability of the hydraulic conductivity in a watershed and compare the observed variations with physiographic and geological aspects. The study area is located in the upper portion of the Jacaré-Pepira sub-basin, an important recharge area of the Guarani Aquifer System (GAS). The hydraulic conductivity was measured using a Guelph Permeameter, which allows the measurement of the recharge under constant hydraulic head, responsible for maintaining the hydraulic head in a saborehole in the ground. The hydraulic conductivity of soils in the study area varied from 1.99E-6 to 6.02E-2 cm s-1, with the highest values associated with sandy soils derived from sandstones of the Botucatu and Piramboia formations, and the lowest ones associated with clayey soils formed by weathering of basaltic rocks from the Serra Geral Formation. A map of hydraulic conductivity distribution of the watershed was created with data measured in the study area. Visual comparison between this map and the geological map of the area corroborated the strong correlation between the hydraulic conductivity and the lithology. Therefore, the variability of the hydraulic conductivity is essentially controlled by outcropping lithologies and their position in the relief.
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spelling Spatial variations in soil hydraulic conductivity in a Guarani Aquifer System recharge areaVariações espaciais na condutividade hidráulica do solo em área de recarga do Sistema Aquífero GuaraniGuarani aquifer systemGuelph permeameterRechargeSmall watershedData on the hydraulic conductivity of soils are important for the understanding of water infiltration processes, and contribute to reduce uncertainties in water balance estimation in watersheds. These data not only allow a better understanding of the spatial distribution of recharge rates in unconfined aquifers, but also are used to develop strategies for the rational and integrated use of surface water and groundwater. In this regard, the objective of this study was to determine the spatial variability of the hydraulic conductivity in a watershed and compare the observed variations with physiographic and geological aspects. The study area is located in the upper portion of the Jacaré-Pepira sub-basin, an important recharge area of the Guarani Aquifer System (GAS). The hydraulic conductivity was measured using a Guelph Permeameter, which allows the measurement of the recharge under constant hydraulic head, responsible for maintaining the hydraulic head in a saborehole in the ground. The hydraulic conductivity of soils in the study area varied from 1.99E-6 to 6.02E-2 cm s-1, with the highest values associated with sandy soils derived from sandstones of the Botucatu and Piramboia formations, and the lowest ones associated with clayey soils formed by weathering of basaltic rocks from the Serra Geral Formation. A map of hydraulic conductivity distribution of the watershed was created with data measured in the study area. Visual comparison between this map and the geological map of the area corroborated the strong correlation between the hydraulic conductivity and the lithology. Therefore, the variability of the hydraulic conductivity is essentially controlled by outcropping lithologies and their position in the relief.Universidade Estadual Paulista 'Júlio de Mesquita Filho' (UNESP) Centro de Estudos Ambientais (CEA), Av. 24A, 1515, Bela VistaUniversidade Estadual Paulista 'Júlio de Mesquita Filho' (UNESP) Centro de Estudos Ambientais (CEA), Av. 24A, 1515, Bela VistaUniversidade Estadual Paulista (Unesp)Rocha, Rodrigo Esteves [UNESP]Gastmans, Didier [UNESP]Sacchi, Marcelo Donadelli [UNESP]De Oliveira, Marcelo Dias [UNESP]2020-12-12T01:46:26Z2020-12-12T01:46:26Z2019-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article35-51http://dx.doi.org/10.33958/revig.v40i2.646Revista do Instituto Geologico, v. 40, n. 2, p. 35-51, 2019.2176-18920100-929Xhttp://hdl.handle.net/11449/19968110.33958/revig.v40i2.6462-s2.0-85075253447Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPporRevista do Instituto Geologicoinfo:eu-repo/semantics/openAccess2024-04-10T19:22:34Zoai:repositorio.unesp.br:11449/199681Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:55:40.158221Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Spatial variations in soil hydraulic conductivity in a Guarani Aquifer System recharge area
Variações espaciais na condutividade hidráulica do solo em área de recarga do Sistema Aquífero Guarani
title Spatial variations in soil hydraulic conductivity in a Guarani Aquifer System recharge area
spellingShingle Spatial variations in soil hydraulic conductivity in a Guarani Aquifer System recharge area
Rocha, Rodrigo Esteves [UNESP]
Guarani aquifer system
Guelph permeameter
Recharge
Small watershed
title_short Spatial variations in soil hydraulic conductivity in a Guarani Aquifer System recharge area
title_full Spatial variations in soil hydraulic conductivity in a Guarani Aquifer System recharge area
title_fullStr Spatial variations in soil hydraulic conductivity in a Guarani Aquifer System recharge area
title_full_unstemmed Spatial variations in soil hydraulic conductivity in a Guarani Aquifer System recharge area
title_sort Spatial variations in soil hydraulic conductivity in a Guarani Aquifer System recharge area
author Rocha, Rodrigo Esteves [UNESP]
author_facet Rocha, Rodrigo Esteves [UNESP]
Gastmans, Didier [UNESP]
Sacchi, Marcelo Donadelli [UNESP]
De Oliveira, Marcelo Dias [UNESP]
author_role author
author2 Gastmans, Didier [UNESP]
Sacchi, Marcelo Donadelli [UNESP]
De Oliveira, Marcelo Dias [UNESP]
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Rocha, Rodrigo Esteves [UNESP]
Gastmans, Didier [UNESP]
Sacchi, Marcelo Donadelli [UNESP]
De Oliveira, Marcelo Dias [UNESP]
dc.subject.por.fl_str_mv Guarani aquifer system
Guelph permeameter
Recharge
Small watershed
topic Guarani aquifer system
Guelph permeameter
Recharge
Small watershed
description Data on the hydraulic conductivity of soils are important for the understanding of water infiltration processes, and contribute to reduce uncertainties in water balance estimation in watersheds. These data not only allow a better understanding of the spatial distribution of recharge rates in unconfined aquifers, but also are used to develop strategies for the rational and integrated use of surface water and groundwater. In this regard, the objective of this study was to determine the spatial variability of the hydraulic conductivity in a watershed and compare the observed variations with physiographic and geological aspects. The study area is located in the upper portion of the Jacaré-Pepira sub-basin, an important recharge area of the Guarani Aquifer System (GAS). The hydraulic conductivity was measured using a Guelph Permeameter, which allows the measurement of the recharge under constant hydraulic head, responsible for maintaining the hydraulic head in a saborehole in the ground. The hydraulic conductivity of soils in the study area varied from 1.99E-6 to 6.02E-2 cm s-1, with the highest values associated with sandy soils derived from sandstones of the Botucatu and Piramboia formations, and the lowest ones associated with clayey soils formed by weathering of basaltic rocks from the Serra Geral Formation. A map of hydraulic conductivity distribution of the watershed was created with data measured in the study area. Visual comparison between this map and the geological map of the area corroborated the strong correlation between the hydraulic conductivity and the lithology. Therefore, the variability of the hydraulic conductivity is essentially controlled by outcropping lithologies and their position in the relief.
publishDate 2019
dc.date.none.fl_str_mv 2019-01-01
2020-12-12T01:46:26Z
2020-12-12T01:46:26Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.33958/revig.v40i2.646
Revista do Instituto Geologico, v. 40, n. 2, p. 35-51, 2019.
2176-1892
0100-929X
http://hdl.handle.net/11449/199681
10.33958/revig.v40i2.646
2-s2.0-85075253447
url http://dx.doi.org/10.33958/revig.v40i2.646
http://hdl.handle.net/11449/199681
identifier_str_mv Revista do Instituto Geologico, v. 40, n. 2, p. 35-51, 2019.
2176-1892
0100-929X
10.33958/revig.v40i2.646
2-s2.0-85075253447
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv Revista do Instituto Geologico
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 35-51
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
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