Título:	Hydraulic characterization from porous aquifers of the Brazilian Federal District
Outros títulos:	Caracterização hidráulica dos aquíferos porosos do Distrito Federal
Autor(es):	Gonçalves, Tatiana Diniz Lohe, Christoph Campos, José Eloi Guimarães
Assunto:	Condutividade hidráulica Aquíferos Hidrogeologia
Data de publicação:	Abr-2015
Editora:	Sociedade Brasileira de Geologia
Referência:	GONÇALVES, Tatiana Diniz; LOHE, Christoph; CAMPOS, José Elói Guimarães. Hydraulic characterization from porous aquifers of the Brazilian Federal District. Brazilian Journal of Geology, São Paulo, v. 45, n. 2, p. 259-271, abr./jun. 2015. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892015000200259&lng=en&nrm=iso>. Acesso em: 19 mar. 2018. doi: http://dx.doi.org/10.1590/23174889201500020006.
Abstract:	Hydraulic conductivity (K) in unsaturated soil is a key input parameter for modeling subsurface water and solute movements. K-values are also important to better define the potential of aquifers and to optimize water resources management activities. Since K-values are usually not readily available, different techniques are applied to estimate them. This study aimed to estimate unsaturated K-values from porous aquifers found in the Federal District of Brazil. Infiltration tests were conducted in different soil types using the open-end-hole approach and the permeability test using shallow boreholes with specific depths, as reported by Heitfeld in 1979. Soil structure was taken into consideration in such estimations. In order to consider important soil properties such as soil texture and bulk density, K-values were also estimated by means of pedotransfer functions (PTFs). Soil texture was determined in the laboratory and used as input parameter for PTFs. Results from open-end-hole method and permeability test compared to those obtained from pedotransfer functions. K-values from four different shallow porous aquifers systems encountered in the Federal District varied from 10-8 ms-1 to 10-6ms-1. Highest K-values were found in Oxisols while the lowest rates were found in Inceptisols. Decreasing conductivity trend was found with increasing depth due to the increase of loamy soils. Variations in the rate of hydraulic conductivity indicated heterogeneity of porous aquifers due to differences in textural and structural characteristics of the soils.
Licença:	Brazilian Journal of Geology - This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY NC 4.0). Fonte: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S2317-48892015000200259&lng=en&nrm=iso. Acesso em: 19 mar. 2018.
DOI:	http://dx.doi.org/10.1590/23174889201500020006
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