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The article "Characteristics of Point Recharge in Karst Aquifers, Water 6: 2782-2807" by N. Somaratne evaluates various recharge estimation techniques applied to four limestone aquifers in South Australia. Somaratne  concludes that methods based on watertable fluctuations, groundwater modelling and water budgets are independent of recharge processes, and are therefore superior to the chloride mass balance (CMB) approach for karst aquifers. The current comment offers alternativedoi:10.3390/w6123727 fatcat:i6dzmhjizvfxdjxdp65pzh2sny