Estimativa da transmissividade a partir da capacidade específica em poços tubulares do aquífero cárstico na região da Apa Carste de Lagoa Santa - MG

Abstract

The Environmental Protection Area (EPA) of Lagoa Santa Karst is located approximately 40 km north of Belo Horizonte (Minas Gerais state) and is geologically composed of carbonate rocks from the Bambuí Group, the main Neoproterozoic unit of the São Francisco Craton. These carbonate sequences serve as a framework for highly significant karst-fissured aquifers that play a crucial role in water supply in the region. Currently, regional hydrogeological studies still face data scarcity, primarily due to limitations in conducting aquifer tests. In this context, this study presents an alternative approach for estimating transmissivity in the EPA. The method establishes an empirical relationship between the specific capacity (Qs) of wells and the transmissivity (T) of the aquifer on a bi-logarithmic graph. Through regression analysis, an equation is derived to estimate T in a more cost-effective manner. This approach offers a viable alternative for obtaining hydrogeological data in karst areas where resources for conducting such tests are limited. Applying the proposed method in the EPA area yielded results consistent with expectations for karst aquifers.