Simulação numérica de fluxo de águas subterrâneas na Bacia de Taubaté, São José dos Campos-SP

• Autor(a) principal: Komatsu, Melissa Hitomi [UNESP]
• Data de Publicação: 2017
• Tipo de documento: Trabalho de conclusão de curso
• Idioma: por
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://hdl.handle.net/11449/202982; http://www.athena.biblioteca.unesp.br/exlibris/bd/capelo/2018-12-11/000908858.pdf
• topic: Águas subterrâneas; Hidrogeologia; Águas subterrâneas - Escoamento; Bacias hidrográficas; São José dos Campos (SP)

Researches related to sustainable use of water are essentials for the appropriated management of this resource. The objective of this final paper is simulating a hydrogeological numerical model to analyze of the groundwater dynamics of the Taubaté Aquifer in a watershed in São José dos Campos. Previous mapping work suggests that this sub-basin is composed mainly for sandstones and claystones of Resende Formation and Pindamonhangaba Formation. Also indicates some quaternary deposits localized along the rivers. The analysis of wells enables a lithological pattern zone subdivision. The geological model was elaborated with 26 wells in EVS 2017.3. The interpolation method used was kriging and resulted in 13 lithological layers. The numerical model and the groundwater simulations were done in Feflow 6.2. The simulations were made in steady state. The structure of the numerical model is 6 equidistant layers made of triangular elements. The lithology was extracting from the geological model. The model calibration was realized by comparing the actual and calculated drawdowns. Modifications of hydraulic conductivity (K) values of soil, clay and sand materials and recharge served to vary the calculated drawdown. The resultant calibration indicates good adjustment rates: NRMSE de 3,67%; R²= 0,9923; = 99,62%. The hydraulic conductivities used in the model were Ksoil= 4x10ˉ5m/s; Kclay =1x10ˉ8m/s e Ksand1= 1,4x10ˉ6 m/s; Ksand2= 2,5x10ˉ6m/s; Ksand3= 9x10ˉ6 m/s; Ksand4= 1x10ˉ5m/s; Ksand5= 2x10ˉ5 m/s. The recharge of 220 mm/year was calculated by hydrographs separation method. The low rate of sensibility coefficient means an adequate degree of reliability. The water balance indicates 22367 m³/day of water input. The source of water's origin is the recharge. The outflow supplies the base flow of the rivers. The well pumping represents 41,55% of recharge. The potentiometric maps indicate north-northwest flow direction. Drawdown map shows that the...