Study on Actual Situation and Influence Factors of Sewerage Flow Rates in Rural Sewerage Facilities

Abstract

This study presented maximum daily flow rates, average daily flow rates and minimum daily flow rates with examination of fitting non-excess probability distribution in order to comprehend the actual situation of sewerage flow rates on observed rural sewerage facilities. The discussion on influence factors of daily flow rates variation is based on real time data measured by flow meters installed in observed rural sewerage facilities. The daily flow rates is confirmed to be influenced by the land use and site conditions of rural sewerage facilities. Therefore, daily flow rate can be estimated with high accuracy from the multiple regression equation in which drinking water and precipitation are considered explanatory variables as well as land use and site conditions. Besides, it is clarified that hourly flow rate fluctuations and peak coefficients was influenced by the duct line length, utilization rate and floating population rate, so they can be derived accurately by multiple regression equation with these three factors. The results of this study are expected to be reflected in setting appropriate design units and management methods of rural sewerage facilities in the future.