Abstract
The combined sewer contributes to improvement in environment of polluting point sources and non-point sources in urban areas, but the conventional diversion facility is low in accuracy of sewage flow rate control and has difficulty in reliably managing wastewater and rainwater, and therefore it is a big problem to improve the function of the sewage flow rate control. This study aims to put the diversion facility improvement theory into practical use on an extension of the knowledge obtained through the conventional hydraulic engineering theory and actual results shown in related reference documents and so on, based on the past study results5) which enabled sewage flow rate control with high accuracy. The study pointed the way to a basic technology of realizing this improvement theory by a hydraulic design under the diversion facility plan condition of a project case and achieving practical use by a structural design. Reliable sewage flow rate management is a key technology capable of effectively coping with the attainment of the purpose through utilization of stock in a confluence improvement project and new sewer vision measures, and it is expected in the future to verify this new technology in test construction.
