Temporal and spatial variability of groundwater recharge on Jeju Island, Korea

Mair, Alan; Hagedorn, Benjamin; Tillery, Suzanne; El‐Kadi, Aly I.; Westenbroek, Stephen M.; Ha, Kyoochul; Koh, Gi-Won

doi:10.1016/j.jhydrol.2013.08.015

Cited by 39 publications

(32 citation statements)

References 65 publications

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“…The hierarchy of controls on patterns of groundwater recharge (GWR) at varying spatial scales is poorly understood (Scanlon et al, 2002). At the regional and watershed scale, where GWR is the renewable resource of large aquifers, recent research has demonstrated the vulnerability of GWR because of land use and climate change (Barron et al, 2012;Flint et al, 2012;Mair et al, 2013). At smaller spatial scales of 1-10 m 2 , lysimeter and tracer studies have shown large temporal variation in such point-scale recharge fluxes under different climate regimes (Allison et al, 1994;Pangle et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

Factors affecting the spatial pattern of bedrock groundwater recharge at the hillslope scale

Appels

Graham²,

Freer

et al. 2015

Hydrological Processes

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The spatial patterns of groundwater recharge on hillslopes with a thin soil mantle overlying bedrock are poorly known. Complex interactions between vertical percolation of water through the soil, permeability contrasts between soil and bedrock and lateral redistribution of water result in large spatial variability of water moving into the bedrock. Here, we combine new measurements of saturated hydraulic conductivity of soil mantle and bedrock of the well‐studied Panola Mountain experimental hillslope with previously collected (sub)surface topography and soil depth data to quantify the factors affecting the spatial pattern of bedrock groundwater recharge. We use geostatistical characteristics of the measured permeability to generate spatial fields of saturated hydraulic conductivity for the entire hillslope. We perform simulations with a new conceptual model with these random fields and evaluate the resulting spatial distribution of groundwater recharge during individual rainstorms and series of rainfall events. Our simulations show that unsaturated drainage from soil into bedrock is the prevailing recharge mechanism and accounts for 60% of annual groundwater recharge. Therefore, soil depth is a major control on the groundwater recharge pattern through available storage capacity and controlling the size of vertical flux. The other 40% of recharge occurs during storms that feature transient saturation at the soil‐bedrock interface. Under these conditions, locations that can sustain increased subsurface saturation because of their topographical characteristics or those with high bedrock permeability will act as hotspots of groundwater recharge when they receive lateral flow. Copyright © 2015 John Wiley & Sons, Ltd.

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Section: Introductionmentioning

confidence: 99%

Factors affecting the spatial pattern of bedrock groundwater recharge at the hillslope scale

Appels

Graham²,

Freer

et al. 2015

Hydrological Processes

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“…As is the case for most natural hydrological variables, aquifer recharge is intrinsically uncertain because weather and physical variables as well as parameters used for its calculation are also uncertain (Milly and Eagleson, 1987;Scanlon, 2000). In addition, spatial evaluations may increase recharge uncertainty through the mapping procedure (Bogena et al, 2005;Mair et al, 2013) when the variables mapped include data sets of suboptimal quality and uneven spatial coverage. For management purposes, recharge calculations should be accompanied by the evaluation of their uncertainty.…”

Section: Introductionmentioning

confidence: 99%

Natural uncertainty of spatial average aquifer recharge through atmospheric chloride mass balance in continental Spain

Alcalá

Custódio

2015

Journal of Hydrology

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“…The atmospheric chloride mass balance (CMB) is an appropriate, widely used method for net aquifer recharge in volcanic island environments [5,6,20,47,48]. Net aquifer recharge means the groundwater fraction that remains in the aquifer after discounting groundwater up-take by direct evaporation and deep-rooted vegetation from direct rainfall and runoff infiltration through the vadose zone after some delay, smoothing out the variability inherent to rainfall events [17,49,50].…”

Section: Atmospheric Chloride Mass Balance (Cmb) Methodsmentioning

confidence: 99%

Aquifer Recharge Estimation through Atmospheric Chloride Mass Balance at Las Cañadas Caldera, Tenerife, Canary Islands, Spain

Marrero-Diaz

Alcalá

Pérez

et al. 2015

Water

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Abstract: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 OPEN ACCESSWater 2015, 7 2452 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.

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Temporal and spatial variability of groundwater recharge on Jeju Island, Korea

Cited by 39 publications

References 65 publications

Factors affecting the spatial pattern of bedrock groundwater recharge at the hillslope scale

Factors affecting the spatial pattern of bedrock groundwater recharge at the hillslope scale

Natural uncertainty of spatial average aquifer recharge through atmospheric chloride mass balance in continental Spain

Aquifer Recharge Estimation through Atmospheric Chloride Mass Balance at Las Cañadas Caldera, Tenerife, Canary Islands, Spain

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