Experimental approach of sewer system pressurization

Urban sewer pressurization is a phenomenon that can cause structural damage and even result in a public health catastrophe, especially in developing countries that have combined rain and waste water drainage systems. Studies have classified the phenomena of downstream to upstream pressurization in stages, proposing several mathematical models to predict the pressure variations and the effect that the air entrainment generate. The present investigation consider the opposite pressurization process, from upstream to downstream. By means of a physical model where draining time and flow rate magnitude are controlled, events of severe flood draining are simulated. Experimental results show that the increase of water level when the system is near pressurization as well as when it pressurizes is a gradual rising. Furthermore, observations with previous data allowed to conclude the difference of both ways of surcharge phenomena in terms of pressure variation. Evaluation of draining time showed that maximum pressures may be reduced if the flood is prolonged, implying possible pressure mitigation. Regulation of the magnitude of the flood, showed that pressure and flow rate don't follow a linear relationship but share a similar tendency as flow rate increase.

• Autores: Camargo Quiroga, David Alejandro
• Tipo de recurso: Trabajo de grado de pregrado
• Fecha de publicación: 2018
• Institución: Universidad de los Andes
• Repositorio: Séneca: repositorio Uniandes
• Idioma: eng
• OAI Identifier: oai:repositorio.uniandes.edu.co:1992/61375
• Acceso en línea: http://hdl.handle.net/1992/61375
• Palabra clave: Aireación del agua; Presión del agua
• Rights: openAccess
• License: https://repositorio.uniandes.edu.co/static/pdf/aceptacion_uso_es.pdf