Resumen

SANCHEZ, Joan Alberto et al. Groundwater Quality: Qhuintana Roo, Mexico, Southern Aquifer. Tecnol. cienc. agua [online]. 2016, vol.7, n.4, pp.75-96. ISSN 2007-2422.

This study was conducted in order to know the status of the groundwater quality of the aquifer south of Quintana Roo, followed by attempts to investigate the spatial and temporal distribution of physicochemical parameters to identify to identify places with the best quality for drinking consume within the study area. This goal has been achieved with the combined use of the Water Quality Index (WQI) and a geographical information system (GIS). The analyzed data correspond to the rainy seasons of 2002 and 2012. Physico-chemical parameters analyzed were pH; temperature (T °); total dissolved solids (TDS); total hardness; sodium (Na+); sulfate (SO42-); chlorides (Cl-), and nitrate (NO;). Descriptive statistics and maps of spatiotemporal distribution and ICA were used in the interpretation of the results. The results denoted conditions of spatial heterogeneity of the medium aquifer, due to processes such as mineral dissolution of carbonate rocks, dolomites and evaporates, the mixing of fresh-salt water and possible anthropogenic pollution, mainly by domestic sewage and fertilizer use. The chemical constituents that exceeded the allowable limit of NOM-127-SSA1-1994 were STD (22% in 2002, and 42% in 2012); total hardness (60%); Na+ (9.8%); Cl-(9.9%), and NO; (3%, 2012). The ICA showed that the chemical quality of groundwater for human consumption is acceptable to most of the sites studied.

Palabras llave : Groundwater; carst; Quintana Roo; water quality index; permissible limits; spatial distribution.

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