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Variação da qualidade da água de irrigação da microrregião homogênea de Catole do Rocha, PB

1984; Embrapa Informação Tecnológica; Volume: 19; Issue: 8 Linguagem: Inglês

1678-3921

Rubens Germano Costa, Hans Raj Gheyi,

Wastewater Treatment and Reuse

The objective of this research was to study the water quality variations in the municipalities of the microregion CatoIe do Rocha, PB, Brazil. One hundred and sixty water samples were collected at two occasions: the first in November 1980 (dry season); and the second in May 1981 (just after the rainy season). These samples were analysed and classified as to risks of salinity, sodicity, residual sodium carbonate and boron. The results showed that after the rains there was an increase of about 7,6% in the good quality water for irrigation (C 1 S 1 and C 2 S 1 ), and in 8% of the water samples the boron level was above 1.25 ppm. According to these results, it may be concluded that the irrigation water commonly found has good quality (CE < 750 µmhos/cm), and can be used for irrigation of the majority of soils and crops, with little probability of salinity and/or sodicity risks.