Groundwater system response at sites with different agricultural land uses: case of the Guarani Aquifer outcrop area, Brotas/SP-Brazil

Author(s)

Manzione, Rodrigo Lilla ; Soldera, Bruna Camargo ; Wendland, Edson Cesar

• Document type: Journal article
• Source: HYDROLOGICAL SCIENCES JOURNAL-JOURNAL DES SCIENCES HYDROLOGIQUES; v. 62, n. 1, p. 28-35, JAN 2017.
• Web of Science Citations: 5

Abstract

A system identification approach can be incorporated in groundwater time series analysis, revealing information concerning the local hydrogeological situation. The aim of this work was to analyse water table fluctuations in an outcrop area of the Guarani Aquifer System (GAS) in Brotas/SP, Brazil, using data from a groundwater monitoring network. The water table dynamic was modelled using continuous time series models that reference the hydrogeological system upon which they operate. The model's climatological inputs of precipitation and evapotranspiration generate impulse response (IR) functions with parameters that can be related to the physical conditions concerning the hydrological processes involved. The interpretation of the model parameters from two sets of monitoring wells selected at different land-use sites is presented, exemplifying the effect of different water table depths and the distance to the nearest drainage location. Systematic trends of water table depths were also identified from model parameters at specific periods and related to plant development, crop harvest and land-use changes. (AU)

• FAPESP's process: 11/11484-3 - Integrated monitoring of quantity and quality parameters of the available water in a Guarani Aquifer System recharge area
• Grantee: Rodrigo Lilla Manzione
• Support Opportunities: Regular Research Grants