TY  - JOUR
KW  - Groundwater;
    Fluoride;
    Regolith;
    Archaen;
    India;
    Sri Lanka
N2  - STUDY REGION: The Maheshwaram and Waipally catchments of Andhra Pradesh, India, and the Plonnaruwa catchment of north-central Sri Lanka. 


STUDY FOCUS: The distribution of F across eight crystalline phases and between the bedrock and the regolith at eleven sites in three catchments is documented. Mineral contributions to F release during weathering and regolith development are quantified. 


NEW HYDROLOGICAL INSIGHTS FOR THE REGION: An estimate of weathering duration for the in situ regolith in Andhra Pradesh, 250-380 Ka, is close to a previous estimate for southern India. Partial or total destruction of the primary F-bearing bedrock minerals and consistent depletion of F in the remnant minerals result in a much reduced total F content in the regolith. Leaching experiments and field relationships, however, indicate a greater potential for F mobilisation to groundwater from the regolith than the bedrock. Schemes for managed aquifer recharge should beware the risk of mobilising additional F to groundwater.
ID  - discovery1522421
TI  - Mineralogical sources of groundwater fluoride in Archaen bedrock/regolith aquifers: Mass balances from southern India and north-central Sri Lanka
AV  - public
Y1  - 2015/09//
EP  - 130
JF  - Journal of Hydrology: Regional Studies
A1  - Hallett, BM
A1  - Dharmagunawardhane, HA
A1  - Atal, S
A1  - Valsami-Jones, E
A1  - Ahmed, S
A1  - Burgess, WG
UR  - http://dx.doi.org/10.1016/j.ejrh.2014.10.003
SN  - 2214-5818
IS  - Part A
N1  - © 2015 Published by Elsevier B.V. This is an open access article
under the CC BY-NC-ND license
(
http://creativecommons.org/licenses/by-nc-nd/3.0/
).
SP  - 111
VL  - 4
ER  -