Aurora City-Wide WDS Modeling and Analysis

CT was brought on by the City of Aurora to do a city-wide water distribution model and to analyze the model for system deficiencies. The process is set to be done in multiple phases, with Phases 1 and 2 completed in 2021.

To complete the phases, CT completed the following tasks:

Phase 1- Update Model & Analyze Existing System

  1. Updated GIS files and initial physical model of the City’s WDS network
  2. Gathered pump and tank flow and level charts, and trending SCADA data
  3. Reviewed water usage records over a multi-year period
  4. Purchased master meter water and MOR data to be obtained and analyzed
  5. A C-factor testing was performed
  6. Set up an extended period simulation (EPS) with appropriate controls to mimic actual system operations as validation under ADD and MDD conditions
  7. Reviewed the Capital Improvements Plan (CIP), as included in the Asset Management Plan (AMP), for proposed improvements
    1. Review this list of improvements against WDS network deficiencies and evaluate any recommended changes
  8. Developed preliminary options of probable project costs for the recommended improvements, and proposed a priority for each project

Phase 2- Analyze Water Quality in the WDS Network

  1. Determined-estimated bulk chlorine decay coefficient in laboratory based on treatment plant tap-water samples
  2. Determined-estimated a global wall chlorine decay coefficient using field and historical data
  3. Incorporated bulk and wall decay coefficients into modeling software and calibrate model using existing data
  4. Evaluated distribution system chlorine residuals and identify low chlorine residual areas
  5. Implemented Decision Blue software for ongoing distribution system water-quality monitoring

Pictured above are the WDS Pressure Zones

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