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Open AccessArticle

Groundwater Recharge Decrease Replacing Pasture by Eucalyptus Plantation

1
Department of Hydraulics and Sanitary Engineering, University of São Paulo, São Carlos, SP 13566-590, Brazil
2
Faculty of Engineering, Architecture and Urbanism and Geography, Federal University of Mato Grosso do Sul, Campo Grande, MS 79070-900, Brazil
3
Department of Civil Engineering, Federal University of Technology–Paraná, Pato Branco, PR 85502-970, Brazil
*
Author to whom correspondence should be addressed.
Water 2019, 11(6), 1213; https://doi.org/10.3390/w11061213
Received: 15 May 2019 / Revised: 2 June 2019 / Accepted: 4 June 2019 / Published: 10 June 2019
(This article belongs to the Special Issue Hydrological Impacts of Climate Change and Land Use/Land Cover Change)
An important unsolved question in hydrology science is the consequence of the Eucalyptus afforestation on groundwater recharge. Here, we assessed recharge estimates before and after converting pasture cover to Eucalyptus plantation. Groundwater levels, recharge, rainfall (P) and actual evapotranspiration (ET) were evaluated from 2004 through 2016 over an outcrop area of the Guarani Aquifer System (GAS) in the southeastern Brazil. Recharge was estimated using the water-table fluctuation method. We observed a decrease of 100 mm/year in groundwater levels after land use changed from pasture to Eucalyptus. The average recharge decreased from 407 mm/year (27% of mean P) to 194 mm/year (13% of mean P) after land use change over the study area. We found a recharge decrease of 19% in 2012 and 58% in 2013 under similar annual rainfall in comparison with the long-term mean recharge (from 2004 to 2016). Our results indicated that the high values of ET observed in Eucalyptus plantation decreases water availability for recharge. Therefore, our findings are important to agencies for decision-making in water resources regarding the management of land cover and land use. View Full-Text
Keywords: forest plantation; guarani aquifer system; land use change; water-table fluctuation forest plantation; guarani aquifer system; land use change; water-table fluctuation
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MDPI and ACS Style

Mattos, T.S.; Oliveira, P.T.S.; Lucas, M.C.; Wendland, E. Groundwater Recharge Decrease Replacing Pasture by Eucalyptus Plantation. Water 2019, 11, 1213.

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