Groundwater recharge estimation using the Water-Table Fluctuation method in the continental portion of Campos Sedimentary Basin, Rio de Janeiro, Brazil
In the present study, we estimated the recharge of unconfined and shallow aquifers in the continental portion of the Campos Sedimentary Basin, Rio de Janeiro state, Brazil, by applying the WTF method. Except for wells P1 and P2, where the most discrepant values were found, an average recharge of 106...
| Authors: | , , |
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| Format: | article |
| Status: | Published version |
| Publication Date: | 2021 |
| Country: | Brasil |
| Institution: | Associação Brasileira de Águas Subterrâneas |
| Repository: | Águas Subterrâneas (São Paulo. Online) |
| Language: | Portuguese |
| OAI Identifier: | oai:ojs.aguassubterraneas.abas.org:article/30079 |
| Online Access: | https://aguassubterraneas.abas.org/asubterraneas/article/view/30079 |
| Access Level: | Open access |
| Keyword: | Hidrogeologia Recarga de água subterrânea Método WTF Gestão de água subterrânea. Hydrogeology Groundwater recharge WTF method Groundwater management. |
| Summary: | In the present study, we estimated the recharge of unconfined and shallow aquifers in the continental portion of the Campos Sedimentary Basin, Rio de Janeiro state, Brazil, by applying the WTF method. Except for wells P1 and P2, where the most discrepant values were found, an average recharge of 106.1 mm was recorded, representing 16.5% of the rainfall, to analyzed period. Ten wells selected in the study area had their water level variation monitored for one hydrological year, from October 2015 to September 2016. Rainfall records from three stations, Campos, Farol de São Tomé, and São Francisco de Paula, were processed through WTF. Recharge estimates are an essential consideration for the management of water resources, and it is generally challenging to estimate recharge accurately. The literature describes several methods to quantify groundwater recharge, the Water Table Fluctuation (WTF) method being one of the most widely used, likely due to the relative abundance of available water table variation data, as well as its simplicity and easy application. The recharge results obtained were similar in eight of the ten wells monitored. The WTF method is applicable for regions with climatic characteristics similar to those of the study area, since monitoring continues for an extended period, with daily water level measurements, if possible. The method may contribute to obtaining more reliable results, which will aid decision-makers in managing the aquifer. |
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