Implementation of an Offline Storage Facility in Washington Suburban Sanitary Commission's Dynamic Hydraulic Sewer System Model

Authors: Wittenberg, Matthias; Barrack, William A.; Dixon, Kenneth C.; Fricke, Craig A.

Source: Water Practice, Volume 1, Number 6, December 2007 , pp. 1-16(16)

Publisher: Water Environment Federation

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Abstract:

A baseline dynamic hydraulic sewer model was developed for the Washington Sanitary Suburban Commission's (WSSC) Rock Creek Sewer Basin using Wallingford's InfoWorks CS program. The sewer system model was used to assess the existing and long-term capacity of the sanitary sewer system and simulate the operation of the Rock Creek Storage Facility. The facility allows WSSC to limit peak wet weather discharges at the basin boundary to an agreed limit. The results showed that the current operational procedures are effective in limiting the flows at the basin boundary though they may result in using the facility more frequently than necessary. Filling the available storage volume early during a storm event caused the storage volume to be unavailable for subsequent storm events. The modeling of alternative operational scenarios resulted in refined procedures that improve the operation of the storage facility.

Keywords: HYDRAULIC MODELING; STORAGE FACILITY; DISCHARGE LIMIT; INFOWORKS; CONTROL ALGORITHM

Document Type: Research article

DOI: 10.2175/193317707X269627

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