Stable isotopes reveal groundwater to river connectivity in a mesoscale subtropical watershed

Autor(es)

Santarosa, Lucas Vituri ^[1] ; Gastmans, Didier ^[1] ; Sanchez-Murillo, Ricardo ^{[2, 3]} ; Santos, Vinicius dos ^[1] ; Batista, Ludmila Vianna ^[1] ; Betancur, Sebastian Balbin ^[1]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Environm Studies Ctr, Rio Claro - Brazil

^[2] Univ Nacl, Stable Isotopes Res Grp, Heredia - Costa Rica

^[3] Univ Nacl, Water Resources Management Lab, Heredia - Costa Rica

• Tipo de documento: Artigo Científico
• Fonte: ISOTOPES IN ENVIRONMENTAL AND HEALTH STUDIES; v. 57, n. 3, p. 236-253, MAY 4 2021.
• Citações Web of Science: 0

Resumo

The Corumbatai River basin (Sao Paulo, Brazil) has a critical situation regarding water availability due to the intensive use to support agriculture and urbanization, requiring scientific information to face water demand. The aim of this study is to present a hydrological characterization based on the analysis of seasonal isotope variations (rainfall, groundwater, and surface water) and hydrometric data. Results indicate that baseflow contribution varies from 50 % to 70 % of the total flow, and water isotopic composition denotes a seasonal regime marked by the mixing of surface and groundwater in the wet period and groundwater discharge during the dry season. The results presented indicated the strong seasonal connection between atmospheric inputs and water movement across the basin, which poses an urgent need to diversify monitoring methods and create feasible regional and political regulations to control the effects on basin water resilience in the face of climate change and growing demand. (AU)

• Processo FAPESP: 17/13576-9 - ISÓTOPOS AMBIENTAIS (d2H e d18O): DESVENDANDO AS ORIGENS DAS ÁGUAS SUPERFICIAIS EM BACIAS HIDROGRÁFICAS DO ESTADO DE SÃO PAULO
• Beneficiário: Lucas Vituri Santarosa
• Modalidade de apoio: Bolsas no Brasil - Doutorado
• Processo FAPESP: 18/06666-4 - Traçadores isotópicos revelando a movimentação da água em bacias hidrográficas do Estado de São Paulo
• Beneficiário: Didier Gastmans
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 16/18735-5 - Composição isotópica da precipitação e suas relações com a variabilidade climática na porção centro sul do estado de São Paulo (BR)
• Beneficiário: Vinícius dos Santos
• Modalidade de apoio: Bolsas no Brasil - Mestrado