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Evaluation of online quality data for assessment of pollution based real time control in a combined sewer system

, and . 23rd European Junior Scientist Workshop, (2017)

Abstract

Real time control (RTC) of combined sewer systems can be an effective measure for reducing negative impacts of combined sewer overflows (CSOs) on receiving water bodies. To assess the potential of pollution based real time control (p-based RTC), a combined sewer overflow tank was equipped with an online spectrometer probe. An evaluation of flow and quality data from 190 rain events during the 2-year measuring period is presented. Special focus was laid on identifying first flushes and other phenomena reducing the efficacy of a pollution based RTC. No significant correlations between different event characteristics such as duration of previous dry weather period, rain intensity or total precipitation could be identified. This implies that the approach of accumulation and washoff may not be sufficient for realistic sewer quality modelling as a basis for p-based RTC.

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