Spatial variations in soil hydraulic conductivity in a Guarani Aquifer System recharge area
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , , |
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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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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1808129374397923328 |