Abstract

CUELLAR CARRASCO, Edwin; ORTEGA ESCCOBAR, Manuel; RAMIREZ AYALA, Carlos  and  SANCHEZ BERNAL, Edgar Iván. Evaluation of sodium adsorption ratio of the waters of the hydrographic network from the Mezquital Valley, Hidalgo. Rev. Mex. Cienc. Agríc [online]. 2015, vol.6, n.5, pp.977-989. ISSN 2007-0934.

The Mezquital Valley in the state of Hidalgo, Mexico, is located within an area of recent volcanic activity, geologically characterized by the predominance of Cenozoic rocks dating from the Tertiary and Quaternary; since it is a volcanic area, whose rocks, in most cases insoluble, present waters with low ionic strength, increasing its ionic strength due to discharges from industrial-urban water systems from the valley of Mexico and the Distrito Federal. The sodium adsorption ratio (SAR) was calculated in four different ways, this parameter shows the danger of irrigation water in relation to sodium, thus dosages required for amendments regarding to sodium. The infiltration problem was determined by infiltration graph that relates electrical conductivity (EC) and sodium adsorption ratio (SAR), having as general parameter a slight reduction in infiltration. Ca²⁺ is important in the stability of soil physical properties and especially hydraulic conductivity; its availability is affected by solubilization and precipitation in the presence of bicarbonate.

Keywords : ionic strength; infiltration; SAR; urban-industrial water.

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