Resumo

MORALES-CASIQUE, Eric; ESCOLERO, Oscar A.  e  ARCE, José L.. Estimation of parameters using inversion and analysis of linear and no-linear hydraulic losses during the development and step-drawdown testing of the San Lorenzo Tezonco well. Bol. Soc. Geol. Mex [online]. 2015, vol.67, n.2, pp.203-214. ISSN 1405-3322.

We present an analysis of step-drawdown tests conducted at the San Lorenzo Tezonco (SLT) deep well located in Mexico City that reached a depth of 2008 m. The hydrogeologic and well parameters are estimated through inversion. The results of the tests illustrate clearly the effect of well development through pumping, where the well efficiency increases during well-development and through successive step-drawdown tests. On the other hand, the values of hydraulic conductivity and specific storage obtained in this work are the first reported in the literature for the Basin of Mexico that correspond to the deep formations between 1176 and 2008 m and that are representative of a scale of hundreds of meters. These values can be used as initial values in the calibration of regional groundwater flow models in the Basin of Mexico. In addition, the values of hydrogeologic and well parameters obtained in this work are useful as reference values to plan and design future wells with similar conditions to the SLT well.

Palavras-chave : Mexico City; hydrogeology; deep formations; hydraulic efficiency; parameter estimation; step drawdown test.