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There are diferent methods in hydrological approach for estimating the environmental fow and a comparative assessment is necessary. The low fow indexes (7Q2 and 7Q10), Smakhtin, Tennent and fow duration curve were used to estimate the environmental fow of Zohreh River in the southwest of Iran. The Smakhtin, 7Q2, 7Q10 and Tennant methods resulted in the estimation of constant values of 27.2, 12.7,...
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