Determinación de contaminación difusa en la Cuenca del río Tomebamba en Monay

Abstract

ABSTRACT Diffuse pollution values was determined in the basin of the river Tomebamba Monay according to land use. To do this, three sites were selected: i. Tomebamba Monay ii. Matadero Sayausí and iii. Llaviuco, in which a flow monitoring and sampling campaigns 27 was performed by analyzing four water quality parameters (TSS, NO3, BOD and COD) for a period of 10 months, covering the wet, dry and seasonal average. In addition, 11 sites were identified relevant point pollution in the basin with their sampling campaigns. The values of point source pollution from these sources were brought to each of the three sites using a one-dimensional mathematical model of contaminant transport for conservative substances. Diffuse pollution of each parameter related to the percentage of land use at each site, determining the respective rates. The results indicate that Llaviuco and Matadero generate low contamination rates compared with Tomebamba watershed. The latter has values of 2 500 kg/d/km2 solids, 12 kg/d/km2 for nutrients and organic matter of 270 kg/d/ km2, for wet seasonality and urban areas. We conclude that wet seasonality and the most intervened basins are those that generate higher rates of diffuse pollution, urbanization being that produces a significant effect on the bodies of water, followed by agricultural-forest-moor exotic and native forest finally, denoting the importance of plans or strategies for watershed conservation.