Uso do modelo Dryrios na simulação de trocas hídricas entre um trecho do Rio Jaguaribe e o Aquífero Aluvionar na Bacia Hidrográfica Patos / Cariús / Iguatu - Ceará

• Ano de defesa: 2014
• Autor(a) principal: Landim, Rafael Bezerra Tavares Vasques
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Palavras-chave em Português: Modelagem hidrológica; Interação rio-aquífero; Semiárido; Hydrologic modeling; River-aquifer interaction; Semiarid; Hidrologia; Recursos hídricos; Aquíferos
• Link de acesso: http://www.repositorio.ufc.br/handle/riufc/20226

The hydrology of semiarid region is quite different from the hydrology of humid and arid regions. Understanding the hydrology under current and future climate, as well as under the influence of the use and occupation of land, is essential for the management and planning of water resources. The interaction mechanism river-aquifer indirectly reflects the knowledge of the groundwater recharge, thus being a prerequisite for the efficient and sustainable management of the groundwater resource. The Dryrios model was developed to simulate the dynamics of river-aquifer in arid and semiarid regions. In this context, the aim of this study was to evaluate the dynamics of river-aquifer flow in the Basin Patos / Carius / Iguatu, located in the South Central region of the state of Ceará, using Dryrios model. In this work we carried out the three monitoring wells located in the study area in the period 2010-2013. Flows River were monitored by CPRM. With information on hydrological variables obtained three parameterizations were performed. Considering seven observed hydrological events, we carried out a sensitivity analysis using the Error (E) as a parameter for analysis. Simultaneously there was the calibration of the model, considering the most sensitive parameters, using the analysis the coefficient of efficiency NASH (COE), reducing the uncertainties of the model parameterization process. Then took place the seven hydrological simulations events aiming to validate the model using E and the COE in the analysis of the results of flow of the river and the aquifer hydraulic loads. The analysis also compared the calculated and observed values of the volumes transported by the event and the maximum peak flows. The results showed that only two parameters had sensitivity saturated hydraulic conductivity and wetting front suction. To calibrate the model, it was found not acceptable improvements. After the calibration of the model, the COE for better flow rates was 36%, an acceptable value. In all calibrations hydraulic loads of the aquifer showed no COE's acceptable. Thus, the use of Dryrios civil society and water resources management institutions did not represent reality, preventing decisionmaking, especially when it comes to groundwater.