Hydrological consequences of Eucalyptus afforestation in the Argentine Pampas
Article first published online: 14 OCT 2005
Copyright 2005 by the American Geophysical Union.
Water Resources Research
Volume 41, Issue 10, October 2005
How to Cite
2005), Hydrological consequences of Eucalyptus afforestation in the Argentine Pampas, Water Resour. Res., 41, W10409, doi:10.1029/2004WR003761., , , , and (
- Issue published online: 14 OCT 2005
- Article first published online: 14 OCT 2005
- Manuscript Accepted: 15 JUN 2005
- Manuscript Revised: 6 MAY 2005
- Manuscript Received: 25 OCT 2004
- Eucalyptus camaldulensis;
- groundwater fluctuations;
 The impacts of a 40 ha stand of Eucalyptus camaldulensis in the Pampas grasslands of Argentina were explored for 2 years using a novel combination of sap flow, groundwater data, soil moisture measurements, and modeling. Sap flow measurements showed transpiration rates of 2–3.7 mm d−1, lowering groundwater levels by more than 0.5 m with respect to the surrounding grassland. This hydraulic gradient induced flow from the grassland areas into the plantation and resulted in a rising of the plantation water table at night. Groundwater use estimated from diurnal water table fluctuations correlated well with sap flow (p < 0.001, r2 = 0.78). Differences between daily sap flow and the estimates of groundwater use were proportional to changes in surface soil moisture content (p < 0.001, r2 = 0.75). E. camaldulensis therefore used both groundwater and vadose zone moisture sources, depending on soil water availability. Model results suggest that groundwater sources represented ∼67% of total annual water use.