Isotopic tracers revealing the water movement in watersheds of the São Paulo State

• Grant number: 18/06666-4
• Support Opportunities: Regular Research Grants
• Start date: September 01, 2018
• End date: February 28, 2021
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geology
• Principal Investigator: Didier Gastmans
• Grantee: Didier Gastmans
• Host Institution: Centro de Estudos Ambientais (CEA). Universidade Estadual Paulista (UNESP). Campus de Rio Claro. Rio Claro , SP, Brazil
• Associated researchers: Amauri Antonio Menegário ; Marcelo Eduardo Dias de Oliveira ; Ricardo Sanchez Murillo ; Troy E. Gilmore

Abstract

In a global scenario of climate change, the sustainable use of water resources requires an understanding about the mechanisms involved in the water movement and storage within the hydrological cycle compartments, since of water scarcity and increased competition for more water supply have been occurring. Future management solutions should consider the climatic factors involved in rainfall formation, the resilience of water in watersheds and their connection to groundwater, leading to formulate policies with the objective of increasing the water supply. In this context, several tracers have been used to understand the water movement and determine their subsurface residence times. Water molecule stable isotopes (2H/1H and 18O/16O) are excellent tracers of water movement along the hydrological cycle, and they are used as complementary tools to interpret discharge origins within watersheds, and climatic controls over precipitation, allowing the use in paleoclimatic reconstitution. In tropical areas climatic factors that control variations in isotopic composition of precipitation remain a controversial issue. Some authors propose that the isotopic composition of precipitation is influenced by aspects of local climate dynamics, others advocate the importance of processes of global scale, such as the Rayleigh distillation type. Environmental isotopes have also been used as a complementary tool in the understanding of hydrological processes in watersheds, helping to understand the mechanisms and processes involved in infiltration and aquifer recharge, as well as the origin of water flows in river discharge, estimation of the water mean transit times (MTT), identification of the flow components origin, as well as in the calibration and/or validation of hydrological models through the estimation of hydrological parameters. Several isotopes can be used to estimate groundwater ages ranging from decades to thousands of years. Two examples where isotopes may be useful for water management are: (i) determining aquifer recharge rates and (2) estimating of mean transit time (MTT) of groundwater in catchments (where transit time is the length of time between recharge and discharge from the aquifer). In both cases, these tracers can be used to formulate hypotheses about groundwater flow and interaction with surface water, and to infer how water resources management and/or changes in climate may impact aquifer systems. Considering these premises and tracers application, the present research project has three main thematic axes, whose scientific challenge is to elucidate the water movement in watersheds of São Paulo state, through the use of a series of isotopic tracers, seeking to understand the variability of the isotopic composition of precipitation and its relation with atmospheric processes in diverse temporal and spatial scales; to evaluate the spatial and temporal variability of the isotopic composition of surface waters in large basins and to study the processes of water infiltration and determine the average times of groundwater transit in small watersheds draining recharge areas of the Guarani Aquifer System. (AU)

Scientific publications

(12)

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

DOS SANTOS, VINICIUS; GASTMANS, DIDIER; SANCHEZ-MURILLO, RICARDO; GOZZO, LUIZ FELIPPE; BATISTA, LUDMILA VIANNA; MANZIONE, RODRIGO LILLA; MARTINEZ, JORGE. Regional atmospheric dynamics govern interannual and seasonal stable isotope composition in southeastern Brazil. Journal of Hydrology, v. 579, DEC 2019. (15/15749-2, 18/06666-4, 16/18735-5)

SANTAROSA, LUCAS VITURI; GASTMANS, DIDIER; GILMORE, TROY E.; BOLL, JAN; BETANCUR, SEBASTIAN BALBIN; GONCALVES, VITOR FIDELIS MONTEIRO. Baseflow and water resilience variability in two water management units in southeastern Brazil. INTERNATIONAL JOURNAL OF RIVER BASIN MANAGEMENT, v. N/A, p. 14-pg., 2022-01-14. (17/13576-9, 18/06666-4)

BETANCUR, SEBASTIAN BALBIN; GASTMANS, DIDIER; VASQUEZ, KATHERINE VASQUEZ; SANTAROSA, LUCAS VITURI; DOS SANTOS, VINICIUS; KIRCHHEIM, ROBERTO EDUARDO. Hydrological responses in equatorial watersheds indicated by Principal Components Analysis (PCA) - study case in Atrato River Basin (Colombia). RBRH-REVISTA BRASILEIRA DE RECURSOS HIDRICOS, v. 25, p. 12-pg., 2020-01-01. (18/06666-4)

EZAKI, SIBELE; GASTMANS, DIDIER; IRITANI, MARA AKIE; DOS SANTOS, VINICIUS; STRADIOTO, MARCIA REGINA. Geochemical evolution, residence times and recharge conditions of the multilayered Tubarao aquifer system (State of Sao Paulo - Brazil) as indicated by hydrochemical, stable isotope and C-14 data. ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES, v. 56, n. 5-6, SI, p. 495-512, NOV 1 2020. (18/06666-4)

SANTAROSA, LUCAS VITURI; GASTMANS, DIDIER; SITOLINI, TATIANA PENTEADO; KIRCHHEIM, ROBERTO EDUARDO; BETANCUR, SEBASTIAN BALBIN; DIAS DE OLIVEIRA, MARCELO E.; VIEGAS CAMPOS, JOSE CLAUDIO; MANZIONE, RODRIGO LILLA. Assessment of groundwater recharge along the Guarani aquifer system outcrop zone in SAo Paulo State (Brazil): an important tool towards integrated management. ENVIRONMENTAL EARTH SCIENCES, v. 80, n. 3, JAN 27 2021. (17/13576-9, 18/06666-4)

QUAGGIO, CAROLINA STAGER; GASTMANS, DIDIER; MARTINS, VERIDIANA TEIXEIRA DE SOUZA; GILMORE, TROY E.. Combined use of statistical Bayesian model and strontium isotopes deciphering the high complexity groundwater flow in the Guarani Aquifer System (GAS). APPLIED GEOCHEMISTRY, v. 146, p. 13-pg., 2022-10-18. (18/06666-4)

SANTAROSA, LUCAS VITURI; GASTMANS, DIDIER; QUAGGIO, CAROLINA STAGER. Stable isotope modeling of the groundwater discharge in complex watersheds of the state of Sao Paulo, Brazil. Journal of South American Earth Sciences, v. 120, p. 11-pg., 2022-10-18. (18/06666-4, 17/13576-9)

SEBASTIÁN BALBÍN BETANCUR; DIDIER GASTMANS; KATHERINE VÁSQUEZ VÁSQUEZ; LUCAS VITURI SANTAROSA; VINÍCIUS DOS SANTOS; ROBERTO EDUARDO KIRCHHEIM. Respostas hidrológicas em bacias hidrográficas equatoriais indicadas pela análise de componentes principais (PCA) – estudo de caso na Bacia do Rio Atrato (Colômbia). RBRH, v. 25, 2020-10-19. (18/06666-4)

SANTAROSA, LUCAS VITURI; GASTMANS, DIDIER; SANCHEZ-MURILLO, RICARDO; SANTOS, VINICIUS DOS; BATISTA, LUDMILA VIANNA; BETANCUR, SEBASTIAN BALBIN. Stable isotopes reveal groundwater to river connectivity in a mesoscale subtropical watershed. ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES, JAN 2021. (18/06666-4, 17/13576-9, 16/18735-5)

SANTAROSA, LUCAS VITURI; GASTMANS, DIDIER; SANCHEZ-MURILLO, RICARDO; SANTOS, VINICIUS DOS; BATISTA, LUDMILA VIANNA; BETANCUR, SEBASTIAN BALBIN. Stable isotopes reveal groundwater to river connectivity in a mesoscale subtropical watershed. ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES, v. 57, n. 3, p. 236-253, MAY 4 2021. (17/13576-9, 18/06666-4, 16/18735-5)

DOS SANTOS, VINICIUS; MARSHALL FLEMING, PETER; HENRIQUE MANCINI, LUIS; DALVA SANTOS COTA, STELA; DE LIMA, GRAZIELE BEATRIZ; RODRIGUES GOMES, RAFAELA; KIRCHHEIM, ROBERTO EDUARDO; SANCHEZ-MURILLO, RICARDO; GASTMANS, DIDIER. Distinguishing the Regional Atmospheric Controls on Precipitation Isotopic Variability in the Central-Southeast Portion of Brazil. ADVANCES IN ATMOSPHERIC SCIENCES, v. N/A, p. 16-pg., 2022-05-11. (19/03467-3, 18/06666-4)

LANCAS, VANDERLEI GOMES; SANTAROSA, LUCAS VITURI; GARPELLI, LIA NOGUEIRA; BORMA, LAURA DE SIMONE; QUAGGIO, CAROLINA STAGER; DE SOUZA MARTINS, VERIDIANA TEIXEIRA; GASTMANS, DIDIER. Assessment of the changes in contributions from water sources to streamflow induced by urbanization in a small-sized catchment in Southeastern Brazil using the dual stable isotopes of water (O-18 and H-2). ENVIRONMENTAL MONITORING AND ASSESSMENT, v. 194, n. 5, p. 15-pg., 2022-05-01. (18/06666-4, 17/13576-9)