Understanding the hydrological processes that define the quality of groundwater 
used for drinking supply in the city of Morelia, Mexico

Hernández Hernández, Mario Alberto; González Sosa, Juan Rodrigo; Navarro Farfán, María del Mar; Sánchez Quispe, Sonia Tatiana

doi:10.57757/IUGG23-3718

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Understanding the hydrological processes that define the quality of groundwater used for drinking supply in the city of Morelia, Mexico

Authors

Hernández Hernández, Mario Alberto
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

González Sosa, Juan Rodrigo
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Navarro Farfán, María del Mar
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

Sánchez Quispe, Sonia Tatiana
IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations;

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Citation

Hernández Hernández, M. A., González Sosa, J. R., Navarro Farfán, M. d. M., Sánchez Quispe, S. T. (2023): Understanding the hydrological processes that define the quality of groundwater used for drinking supply in the city of Morelia, Mexico, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-3718

Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5020825

Abstract

The city of Morelia (western Mexico) has a population of 800,000 inhabitants and constant urban growth, requiring large volumes of water and facing problems with the supply, causing a deficit and affecting water availability.The study evaluates the quality conditions in which the main sources of supply are found, through physicochemical and isotopic characterization, used as tools to relate the intense use of water with the natural water cycle and its renewability. By studying the relative abundance of stable isotopes and differences in physicochemical parameters of rainwater, surface water, groundwater, and spring sources, natural recharge and discharge processes can be analyzed, as well as the effect of groundwater overexploitation.Two samplings were carried out, one in 2018 for rainwater (with more than 70 samples), and another in February 2021, from the drinking water supply system (operated by a local water agency), collecting 76 samples from wells, springs, and surface streams. Climatological precipitation and temperature data were collected and processed with hydrogeological and isotope data.The isotopic data were compared with the Water Isotopes database of sites near the study area, and a provisional Local Meteoric Line (LML) was determined. The isotopic and physicochemical results of the water from supply sources (wells, springs, rivers), their analysis through bivariate graphs, hydrogeochemical classification, and spatial distribution in the study area give an idea of the groundwater flow dynamics and its relationship with its exploitation, observing a similar behavior between some of the parameters measured in the field for the different water sources.