Water Quality Evolution During Managed Aquifer Recharge (MAR) in Indian Crystalline Basement Aquifers: Reactive Transport Modeling in the Critical Zone

Marie Pettenati (1) , Géraldine Picot-Colbeaux (1) , Dominique Thiéry (1) , Alexandre Boisson (1) , Marina Alazard (1) , Jérome Perrin (1) , Benoît Dewandel (1) , Jean-Christophe Maréchal (1) , Shakeel Ahmed (2) , Wolfram Kloppmann (1)

1 BRGM - Bureau de Recherches Géologiques et Minières (BRGM)
2 CSIR - Council of Scientific and Industrial Research [India]

The present study investigates the role of MAR (Managed Aquifer Recharge) on groundwater quality overexploited crystalline aquifers in semi-arid context (South India). A 1D transient reactive transport model was conceived to simulate the infiltration of a recharge tank through the critical zone. The model takes into account hydrodynamics, evaporation, kinetic weathering of minerals (precipitation/dissolution), adsorption, cationic exchange. Results show the beneficial effect of MAR on groundwater quality, in particular on Fluoride accumulation, a widespread problem in the Indian context, strongly depending on seasonal climatic variations.

Keywords: MAR; overexploited crystalline aquifers; Fluoride accumulation; critical zone; reactive transport modelling

Domains: Sciences of the Universe [physics]; Earth Sciences

Marie Pettenati, Géraldine Picot-Colbeaux, Dominique Thiéry, Alexandre Boisson, Marina Alazard, et al.. Water Quality Evolution During Managed Aquifer Recharge (MAR) in Indian Crystalline Basement Aquifers: Reactive Transport Modeling in the Critical Zone. Procedia Earth and Planetary Science, 2014, 10, pp.82 - 87. ⟨10.1016/j.proeps.2014.08.016⟩. ⟨hal-03670677⟩