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The agriculture-industrial development in the northwest area of the state of Parana, comes provoking in the last years the interest for the exploration of water in Caiua aquifer. Tubular wells have been drilled as form of supplying the demand of water mainly in public provisioning of the municipal districts. In that way, the studies of the groundwater reserves of that aquifer is extremely important. For this end, the hydrographical sub-basin of the Antas river was selected objectifying a local study as the evaluation of the regulator and permanent reserves of Caiua aquifer in the state of Parana. The permanent reserve was evaluated in 4,5 x 10 11 m 3 , calculated in function of the area of occurrence of Caiua aquifer in the sub-basin of the Antas river, the saturated thickness average and the specific yield. The regulator reserve was evaluated in 6,7 x 10 9 m 3 /year, starting from the recession curves of the Antas river.

DETERMINAÇÃO DA RESERVA REGULADORA DO AQÜÍFERO CAIUÁ NO ESTADO DO PARANÁ UTILIZANDO AS CURVAS DE RECESSÃO DO RIO DAS ANTAS