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VIABILITY OF THE USE OF MINIMUM WATER QUALITY INDICES: A COMPARISON OF METHODS

机译：VIABILITY OF THE USE OF MINIMUM WATER QUALITY INDICES: A COMPARISON OF METHODS

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abstract_textpThe achievement of all the water quality parameters that constitute the water quality indices can be a hamper to their use. The objective of this study was to analyze the viability of using minimum indices to monitor water quality, comparing different methods. For this purpose, the Environmental Company of the State of Sao Paulo database for the year 2016 of the Tiete/Jacare and the Tiete/Batalha units was used. Four indices present in the literature were compared with the indices currently practiced in the states of Sao Paulo and Minas Gerais ("standard indices"). For feasibility analysis, the indices were classified by the "standard indices" methods and compared to them. The minimum indices were significantly correlated with the "standard indices", from moderate to strong degree. The minimum indices, as a rule, overestimated water quality when compared to the index of the state of Minas Gerais; and underestimated when compared to the index of the state of Salo Paulo. It is concluded that the minimum indices are useful and practicable tools, with respect to the use of the WQI for management purposes. However, such indices should be evaluated periodically to avoid making mistaken decisions./p/abstract_text

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