• Journal of Korean Society of Water and Wastewater
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• v.27 no.5
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• pp.649-659
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• 2013

Real time control (RTC) can be broadly defined as a system that dynamically adjusts the operation of facilities in response to online measurements in the field to maintain and meet the operational objectives, both during dry and wet weather conditions. RTC adds a dynamic component that is actively adjusted in real time based on system conditions. In terms of reducing or eliminating sewer flooding, CSOs and/or managing flows, implementation of RTC has various benefits to sewer system operation. It has been emerging as an attractive approach, but related elements (such as framework for the application, its components and equipments, aspects to be considered) towards its application on sewer systems have not been throughly introduced so far. The main goal of this study is to review several applications of RTC and firm guidelines published abroad, and finally to provide a framework for the proper application of RTC on sewer systems.

• Journal of Korean Society of Water and Wastewater
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• v.27 no.6
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• pp.711-721
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• 2013

Optimal operation of a combined sewer network with distributed storage facilities aims to use the whole retention capacity of all reservoirs efficiently before overflows take place somewhere in the considered network system. An efficient real-time network control (RTNC) strategy has been emerging as an attractive approach for reducing substantially the overflows from a sewer network compared to the conventional fixed or manually adjusted gate setting method, but the related concrete framework for RTC development has not been throughly introduced so far. The main goal of this study is to give a detailed description of the RTNC systems via reviewing several guidelines published abroad, and finally to suggest methods for the proper application of RTNC on distributed storage facilities. Especially, this study is focused on emphasizing the importance of hierarchical structure of RTNC system that consists of three control layers (management, global control and local control). Further, with regard to the global control layer which is responsible for the central overall network control, the wide-ranging details of two components (adaption and optimization layers) are also presented. This study can provide the valuable basis for the RTNC implementation in the particular sewer network with distributed multiple storage facilities.