Data/hora: 01/06/2024 09:21:33

Provedor de dados: | 42
País: | Brazil
Título: | Recharge contribution to the Guarani Aquifer System estimated from the water balance method in a representative watershed
Autores: | Wendland,Edson; Gomes,Luis H.; Troeger,Uwe.
Data: | 2015-06-01
Ano: | 2015
Palavras-chave: | Groundwater; Monitoring; Recharge; Specific yield; WTF.
Resumo: | The contribution of recharge to regional groundwater flow systems is essential information required to establish sustainable water resources management. The objective of this work was to determine the groundwater outflow in the Ribeirão da Onça Basin using a water balance model of the saturated soil zone. The basin is located in the outcrop region of the Guarani Aquifer System (GAS). The water balance method involved the determination of direct recharge values, groundwater storage variation and base flow. The direct recharge was determined by the water table fluctuation method (WTF). The base flow was calculated by the hydrograph separation method, which was generated by a rain-flow model supported by biweekly streamflow measurements in the control section. Undisturbed soil samples were collected at depths corresponding to the variation zone of the groundwater level to determine the specific yield of the soil (drainable porosity). Water balances were performed in the saturated zone for the hydrological years from February 2004 to January 2007. The direct recharge ranged from 14.0% to 38.0%, and groundwater outflow from 0.4% to 2.4% of the respective rainfall during the same period.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000200595
Editor: | Academia Brasileira de Ciências
Relação: | 10.1590/0001-3765201520140062
Formato: | text/html
Fonte: | Anais da Academia Brasileira de Ciências  v.87 n.2 2015
Fonte: | info:eu-repo/semantics/openAccess