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Transmissivity of Aquifer by Capture Zone Method: An Application in the Sete Lagoas Karst Aquifer, MG, Brazil Anais da ABC (AABC)
GALVÃO,PAULO; HALIHAN,TODD; HIRATA,RICARDO.
ABSTRACT Transmissivity is an important hydraulic parameter to determine the amount of water passed horizontally across a given saturated thickness of an aquifer. The techniques to quantify this parameter, such as grain size analyses or pumping tests, can have limitations of time/spatial scale, viability, or economically. One technique that can be used, but little adopted, is the capture zone analysis. In this paper, capture zone analytical equations were used to estimate transmissivity values in order to verify the effectiveness of this methodology as alternative in situations where other traditional methods present implementation difficulties. The results were compared with field data estimated by aquifer tests conducted in the same region. A sensitivity...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Transmissivity; Capture zone; Aquifer test; Brazil..
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000100091
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Use of convolution and geotechnical rock properties to analyze free flowing discharge test Anais da ABC (AABC)
WENDLAND,EDSON; GOMES,LUIS HENRIQUE; PORTO,RODRIGO M..
Discharge tests are conducted in order to determine aquifers transmissivity (T) and storage coefficient (S). However the interpretation of test data is not unique and the results may vary depending on adopted hypothesis. In this work, the convolution technique is applied for the reconstruction of observed drawdown curves aiming for the reduction of uncertainty. The interference between a flowing well and an observation well is evaluated in order to determine the hydrogeological parameters of the confined Guarani Aquifer System (Araujo et al. 1999). Discharge test data are analyzed according to the Jacob and Lohman (1952)method. The application of convolution enabled the determination of the most reliable solution. Obtained transmissivity (T = 411.0 m2/d)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Hydrogeology; Groundwater; Transmissivity; Storage coefficient; Pumping test.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100117
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