WATER SALINITY OF THE CURU RIVER - CEARA, DURING DROUGHT PERIOD

The basin of Curu Valley in the state of Ceara has a considerable importance in water supply for domestic consumption, industry, fishing activities and mainly for irrigation of agricultural areas. The Curu River, main River of Basin receives polluted water from various (several) places, including co...

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Bibliographic Details
Published in:Revista brasileira de agricultura irrigada 2016-03, Vol.10 (2), p.507-514
Main Authors: Gomes Moreira, Vanessa Ohana, Ferreyra Hernandez, Fernando Felipe, Silva Marques, Edilaine da, de Sousa Luna, Nayara Rochelli
Format: Article
Language:English
Subjects:
Decapoda
Freshwater
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Summary:The basin of Curu Valley in the state of Ceara has a considerable importance in water supply for domestic consumption, industry, fishing activities and mainly for irrigation of agricultural areas. The Curu River, main River of Basin receives polluted water from various (several) places, including communities, shrimp ponds, and others. Which can salt the source of water placing agricultural production in the region of risk, therefore, the objective of this study was to evaluate the quality of water throughout the river route, taking into account the presence of salts. It was chosen a dry period, 21 collection points from the source to the mouth of the river. In all water samples were analyzed electrical conductivity (EC), pH, calcium (Ca2+), magnesium (Mg2+), potassium (K+), sodium (Na+), chloride (Cl-), bicarbonate (HCO3-), and sulfate (SO42-) . Regarding the presence of salts, in most of the Curu River, water meet with moderate restrictions for the use of irrigation In mangroves and river mouth, the salt concentration was quite high, but near these points there is no presence of arable land that they can use these waters. It was concluded that the quality of water has moderate restriction for irrigation in most of its length, with the exception of points in the mangroves and the mouth of the river, that the influence of the tide, has high amounts of salts
ISSN:1982-7679