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Avaliação da contaminação da água por práticas agrÃcolas
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ISBN10: 6209589472
ISBN13: 9786209589478
Publisher: Edicoes Nosso Conhecimento
Published: Jan 27 2026
Pages: 112
Weight: 0.35
Height: 0.27 Width: 6.00 Depth: 9.00
Language: Portuguese
ISBN13: 9786209589478
Publisher: Edicoes Nosso Conhecimento
Published: Jan 27 2026
Pages: 112
Weight: 0.35
Height: 0.27 Width: 6.00 Depth: 9.00
Language: Portuguese
Este estudo avalia o impacto das práticas agrÃcolas na contaminação da água na planÃcie de Triffa (leste de Marrocos). A intensificação da agricultura, a irrigação maciça e a utilização excessiva de fertilizantes e pesticidas conduziram a uma deterioração significativa da qualidade das águas subterrâneas e superficiais. As análises fÃsico-quÃmicas revelam concentrações de nitratos entre 2,32 e 153 mg/L, sendo que 73% dos poços excedem a norma da OMS de 50 mg/L. As águas revelam igualmente um aumento da salinidade, que varia entre as classes C3S1 e C5S3, o que reflecte uma sodicidade crescente e prejudicial para as culturas sensÃveis. As análises bacteriológicas revelam uma contaminação quase generalizada por coliformes fecais e estreptococos. Apesar das alterações quÃmicas acentuadas, o fácies da água continua a ser essencialmente cloreto de sódio e cloreto-sulfato de cálcio e de magnésio. Este trabalho sublinha a necessidade de uma gestão racional dos factores de produção agrÃcola para preservar a qualidade dos recursos hÃdricos da região.
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