Hydrological Sciences Journal · 2018 · 16 citations · 24 references
Natural ResourcesEarth SciencesHydrologyCatchment HydrologyGroundwater HydrologyHydrogeologyAquifer RechargeGroundwater DischargeGroundwater RechargeGroundwater Resource AssessmentPrecipitationRainfall-runoff ProcessesGroundwater Recharge AssessmentGroundwater Recharge EstimationHydrogeological InvestigationRechargeRecharge EstimationRecharge QuantificationRecharge Rate EstimationSemi-arid Climate
A basic component of any hydrogeological study is the magnitude and temporal variation of groundwater recharge. This can be difficult to assess accurately, particularly in arid and semi-arid rainfed mid-mountain zones, as is the situation in the rural, low population density zones of North-Central Chile. In this study, recharge in the Punitaqui Basin, North-Central Chile, was characterized, contrasting the results of two methods: a modified Thornthwaite-Mather (MTM) and discharge recession analysis (DRA). We found a recharge rate of between 1 and 4% of average annual precipitation. Average recharge estimated by the MTM method is consistently higher than that estimated by DRA. Also, DRA tends to smooth the recharge values, resulting in a lower inter-annual variation coefficient. Both methods identified a threshold value of total annual precipitation, above which recharge can be expected to occur, of the order of 180 mm year−1, consistent with values reported in similar areas.
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Global synthesis of groundwater recharge in semiarid and arid regions
Bridget R. Scanlon, K. E. Keese, Alan L. Flint et al. · Hydrological Processes · 2006 · 1.3K citations