Seasonal quality changes in waters from Edson Queiroz dam, Acaraú basin, in the semiarid of Ceará.

Authors

  • Ana Meireles Universidade Federal do Ceará
    • Horst Frischkorn Universidade Federal do Ceará
      • Eunice Andrade Universidade Federal do Ceará

        Keywords:

        stratification, oxygen-18, Edson Queiroz dam

        Abstract

        The Edson Queiroz Dam (251 hm3) is located in the Acaraú river basin of Ceará State, in the semi-arid Northeast of Brazil. During December 2002 to December 2003 monthly samples were taken for analyses of 18O, CE and Cl- in the water released for irrigation, captured at the bottom of the reservoir. After the rainfall period, a strong stratification has been observed caused by submerging recharge waters that are colder than those stored. Stratification persisted for about five months due to weak winds and reduced daily thermal amplitude during this season. Even though salinity (with maximum EC observed of 460 µS.cm-1) is low by regional standards, the phenomenon imposes a large amplitude on seasonal water quality changes for irrigation.

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        Published

        2008-11-17

        Issue

        Vol. 38 No. 1 (2007)

        Section

        Ciência do Solo e Engenharia Agrícola

        License

        Atribuição
        CC BY

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        How to Cite

        MEIRELES, Ana; FRISCHKORN, Horst; ANDRADE, Eunice. Seasonal quality changes in waters from Edson Queiroz dam, Acaraú basin, in the semiarid of Ceará. Revista Ciência Agronômica, [S. l.], v. 38, n. 1, 2008. Disponível em: https://periodicos.ufc.br/revistacienciaagronomica/article/view/83737. Acesso em: 10 sep. 2026.