G. Pédro's scientific contributions
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Publications (2)
In the tropical regions, the evolution of water chemical composition from rain to the groundwater table appears to be strongly related to the vegetation. The forest nutrition induced groundwater acidity that was enhanced by the flow of positive alkalinity waters out of the system as surface runoff. The groundwater pH ranged from 4 to 4.5 as a resul...
Citations
... the substrate of the white sand vegetation, composed mainly of quartz grains, may have increased the acidity of the groundwater due to the flow of alkaline waters outside the system as surface runoff. The lack of weathering of primary minerals, forest nutrition and CO 2 released by the roots may cause changes in the groundwater ph (Grimaldi and Pedro 1996). thus, subsequent acid hydrolysis could have further contributed to the establishment of species adapted to highly acidic conditions. ...
... Some authors have used alkalinity as an algebraic parameter to quantify the alkalisation of the nutrient solution by plants (Vallès et al., 1993) or to calculate proton budgets or H + transfer processes involving vegetation (Van Breemen et al., 1983;Bourrié & Lelong, 1990;Grimaldi & Pedro, 1996). Residual alkalinity (Van Beek & Van Breemen, 1973), which is derived from the residual carbonate concept (Eaton, 1950) and generalised byDroubi et al. (1980), has been used successfully for recent quantitative studies, and particularly for hydrograph deconvolutions (Christophersen et al., 1990;Ribolzi et al., 1996). ...
