| Grant number: | 23/13160-8 |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| Start date: | April 01, 2024 |
| End date: | March 31, 2028 |
| Field of knowledge: | Physical Sciences and Mathematics - Geosciences |
| Principal Investigator: | Edson Cezar Wendland |
| Grantee: | José Gescilam Sousa Mota Uchôa |
| Host Institution: | Escola de Engenharia de São Carlos (EESC). Universidade de São Paulo (USP). São Carlos , SP, Brazil |
| Associated research grant: | 20/15434-0 - SACRE: integrated water solutions for resilient cities, AP.TEM |
Abstract With the intensification of the impacts of land use and land cover changes and climate change on the ecosystem services provided by water bodies, it is necessary to precisely understand the hydrological and biogeochemical processes that occur in the transition zone between surface and groundwater, also known as the hyporheic zone, as these play an essential role in the transport of nutrients and pollutants. However, little is still known about the dynamics of these processes and, consequently, the potential disruptions to their structure and functions. The Guarani Aquifer System (GAS), crucial for the water security and dynamics of groundwater in the state of São Paulo, is highly vulnerable to anthropogenic contamination in its outcrop areas where underground and surface flows converge. The present proposal was developed with the aim of improving the characterization of hydrological flows in this transition zone and the possible impacts on the outcrop areas of the SAG in the state of São Paulo. To achieve this, a systematic review and a database are proposed to assess the aforementioned impacts on quantitative, qualitative, and ecosystem service aspects. Through continuous qualitative and quantitative monitoring of a representative area of this aquifer system, a regional water balance model and a heat and nutrient transport model at a local scale will be developed. After calibration and validation of these models, it will be possible to characterize critical regions of this aquifer system and contribute to the understanding of the aforementioned impacts on hydrological flows and biogeochemical processes in the hyporheic zone. The present proposal will enable a better understanding of the dynamics of the SAG waters and their hydrological responses to current events and the analysis of future scenarios under conditions of climate change and land use and land cover changes. | |
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