Herramientas para decisiones gerenciales, frente a riesgos por funcionamiento inadecuado de redes de alcantarillado, en ciudades andinas. Caso de estudio: La microcuenca José María Alemán, en el sector de Solanda del Distrito Metropolitano de Quito

Abstract

The drainage network cadastre is the basis of the hydraulic evaluation matrix as an initial tool that improves management decisions in their maintenance. A discretization of inspection structures was performed based on the Qmp/Q-basedcriterion80% greater than 1.0 to identify them as "defective" and validate the information using physical state photographs. The multiple regression analysis considered several independent variables (diameter, length, run slope, speed), and K was calculated; these equations are the second tool and should be considered in designs of new sewer networks in order to extend the service life and verify operation during their operation. The results indicate acceptable correlation values and typical errors less than 1.5%. When calculating drainage networks, the K coefficient is compared with the Froude number and whether their values are very close to each other if the operation of the structures is anticipated to be inadequate. With these tools, plans are developed, to visualize areas of possible risks for improper operation because there are sections with insufficient hydraulic capacity and / or speeds that cause abrasion phenomena in the control structures, achieving a third tool.