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Operational guidance for aeration and flow augmentation for the Chicago Area Waterway System—A case study

Water Science and Engineering 2023年第4期16卷 345-358页

作者： Charles S.Melching jennifer wasik Ed Staudacher Thomas Minarik Melching Water Solutions LLC GreenfieldWI 53221USA Metropolitan Water Reclamation District of Greater Chicago ChicagoIL 60611USA Metropolitan Water Reclamation District of Greater Chicago CiceroIL 60804USA

The Chicago Area Waterway System(CAWS)is a 133.9 km branching network of navigable waterways controlled by hydraulic structures,in which the majority of the flow is treated wastewater effluent and there are periods of substantial combined sewer *** CAWS comprises a network of effluent dominated *** stringent dissolved oxygen(DO)standards and a reduced flow augmentation allowance have been recently applied to the ***,a carefully calibrated and verified one-dimensional flow and water quality model was applied to the CAWS to determine emission-based real-time control guidelines for the operation of flow augmentation and aeration *** goal of these guidelines was to attain DO standards at least 95%of the ***“optimal”guidelines were tested for representative normal,dry,and wet *** finally proposed guidelines were found in the simulations to attain the 95%target for nearly all locations in the CAWS for the three test *** developed operational guidelines have been applied since 2018 and have shown improved attainment of the DO standards throughout the CAWS while at the same time achieving similar energy use at the aeration stations on the Calumet River system,greatly lowered energy use on the Chicago River system,and greatly lowered discretionary diversion from Lake Michigan,meeting the recently enacted lower amount of allowed annual discretionary *** case study indicates that emission-based real-time control developed from a well calibrated model holds potential to help many receiving water bodies achieve high attainment of water quality standards.

关键词： Water quality modeling Water quality management Real-time control Stream aeration Flow augmentation Dissolved oxygen

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