Aquifer recharge estimation through atmospheric chloride mass balance at Las Cañadas Caldera, Tenerife, Canary Islands, Spain
MetadataShow full item record
The atmospheric chloride mass balance (CMB) method was used to estimate net aquifer recharge in Las Cañadas Caldera, an endorheic summit aquifer area about 2000 m a.s.l. with negligible surface runoff, which hosts the largest freshwater reserve in Tenerife Island, Canary Islands, Spain. The wet hydrological year 2005-2006 was selected to compare yearly atmospheric chloride bulk deposition and average chloride content in recharge water just above the water table, both deduced from periodical sampling. The potential contribution of chloride to groundwater from endogenous HCl gas may invalidate the CMB method. The chloride-to-bromide molar ratio was an efficient tracer used to select recharge water samples having atmospheric origin of chloride. Yearly net aquifer recharge was 631 mm year-1, i.e., 69% of yearly precipitation. This result is in agreement with potential aquifer recharge estimated through an independent lumped-parameter rainfall-runoff model operated by the Insular Water Council of Tenerife. This paper illustrates basic procedures and routines to use the CMB method for aquifer recharge in active volcanic oceanic islands having sparse-data coverage and groundwater receiving contribution of endogenous halides. © 2015 by the authors.
Showing items related by title, author, creator and subject.
Assessing impacts of future potential climate change scenarios on aquifer recharge in continental Spain (2020) Pulido-Velazquez D.; Collados-Lara A.-J.; Alcalá F.J. (Elsevier B.V., 2018)
Usefulness of the Cl/Br ratio to identify the effect of reverse osmosis treated waters on groundwater systems (2020) Alcalá F.J. (Elsevier B.V., 2019)
A feasible methodology for groundwater resource modelling for sustainable use in sparse-data drylands: Application to the Amtoudi Oasis in the northern Sahara (2020) Alcalá F.J.; Martín-Martín M.; Guerrera F.; Martínez-Valderrama J.; Robles-Marín P. (Elsevier B.V., 2018)