Abstract

GUERRERO-DOMINGUEZ, Lilisbet et al. Suitability for agricultural irrigation of Mampostón sub-basin surface water, Mayabeque, Cuba. cultrop [online]. 2021, vol.42, n.3, e11.  Epub Sep 30, 2021. ISSN 0258-5936.

It is common to find effects on agricultural production derived from water quality, so the evaluation of its aptitude for irrigation is decisive to ensure food safety. The present work aimed to evaluate the chemical-physical and microbiological quality of the surface water of Mampostón sub-basin, for its use in agricultural irrigation. The parameters pH, electrical conductivity (EC), majority anions and cations, heavy metals (HM), dissolved organic carbon (DOC) and particular (POC), chemical (COD) and biological oxygen (BOD5) demand and content of total and fecal coliforms. The spatio-temporal variability of these parameters was determined by bifactorial ANOVA, establishing that the differences were in the main effects (monitoring stations and sampling time) and not in the interaction between them. The analysis of spatial variability indicated that stations G2, G3 (Ganuza river) and M5 (Mampostón river), presented organic and soluble salts contributions that establish limitations for their use. The average concentrations of dissolved Pb exceeded the permissible limits in stations G1, G2, G4 (Ganuza river), M2, M3 (Mampostón river) and P1 (Pedroso diverter dam), which disables their exploitation. The content of fecal coliforms compromises the quality of the water in station M5 (Mampostón river). The water from the rest of the sampling stations in the Pedroso diverter dam and the Mampostón dam are suitable for use in agricultural irrigation. A monitoring program and management strategy should be designed in the area.

Keywords : irrigation; heavy metals.

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