A dead-end street that has needed monthly emergency flushing for two years isn't a flushing problem anymore -- it's a diagnostic problem that flushing has been treating as a symptom instead of a cause. Getting to the actual root cause, and using modeling to catch these situations before they become chronic, is advanced-level distribution work that goes beyond the process-control responses covered in earlier guides.
Disinfectant Residual Mapping and Hydraulic/Water Quality Modeling
Hydraulic and water quality modeling tools (EPANET-type software is the most widely used in the U.S. drinking water industry) let an operator simulate, rather than only measure after the fact, how water -- and the disinfectant residual within it -- moves through the entire distribution network. A calibrated model can:
- Predict travel time and residence time (water age) throughout the network, identif