Abstract

CARABALI, Joffre Quinteros et al. Evaluación de la calidad de agua para riego y aprovechamiento del recurso hídrico de la quebrada Togllahuayco. Siembra [online]. 2019, vol.6, n.2, pp.46-57. ISSN 2477-8850.  https://doi.org/10.29166/siembra.v6i2.1641.

Water used for agronomic purposes has significant effects on crop production as well as on the chemical soil deterioration. This study assesses the quantity and quality of water available for irrigation of a sustainable quinoa crop in the Togllahuayco gorge in Guangopolo parish, Ecuador. This place has a volume of 23.347,95 m3 per year of water and only requires 6747,5 m3 per year for quinoa cultivation. Water samples were taken, and the concentration of sodium, potassium, calcium, magnesium, carbonates, bicarbonates, sulfates, chlorides and electrical conductivity were measured. The sodium adsorption ratio index (SAR) was calculated. The Pearson method between RAS variables and electrical conductivity was applied by finding a correlation. The RAS was 3.94 meq/L and the electrical conductivity (EC) was 324 uS/cm. The water is in the C2S1 classification after application of the Richards method presenting a low value of saline hazard and an average value of sodium hazard, being suitable for irrigation. The results of this research are the basis for the development of a sustainable water resources management plan and adequate soil management in this place. In addition, an approach should be implemented that allows ecological recovery of the territory avoiding soil erosion and wear.

Keywords : Water security; Correlation; Conductivity; Water availability; SAR.

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