Abstract

CHALLAPA, Aliveth C.; RODRIGUEZ-LEVY, Inti E.; DELFIN, Mirko  and  FUENTES, Grover. Modelling of the contribution of agrochemicals from the Kaymani sub-basin towards the Misicuni reservoir. RevActaNova. [online]. 2022, vol.10, n.4, pp.391-429.  Epub Nov 31, 2022. ISSN 1683-0789.

In order to carry out integrated management of the water from its reservoir, Empresa Misicuni Company has identified the need to determine the contribution of the agrochemicals directed to the reservoir from the tributary basins. For this, the Kaymani sub-basin has been selected as a case study, considering its topographical characteristics and the presence of agricultural activity within its limits. To meet the objectives of the research, the agricultural activity was initially characterized, determining that the most used fertilizer in the crops of the basin is chicken manure, together with the pesticides Lambdacyalothrin and Mancozeb (known as Karate and Curaza, respectively) applied to the control of insects and fungi. In the same way, land use maps of the basin were developed, corresponding to the years 2011 and 2019. These maps allowed showing an increase of 5% in areas destined for agricultural activities. Likewise, runoff and sedimentation in the subbasin were estimated using the SWAT model. As a result, a runoff of around 130 mm per year was calculated, and a sediment drag of 51 t ha-1, on average. Finally, an input to the reservoir of 0.17 t ha-1 of total Nitrogen, 0.079 t ha-1 of total Phosphorus, 0.23 kg ha-1 of Lambdacyalothrin and 2.87.10-2 kg ha-1 from Manconzeb was estimated as an annual average.

Keywords : Fertilizers; pesticides; SWAT; Misicuni reservoir; Land use.

        · abstract in Spanish     · text in Spanish     · Spanish ( pdf )