Wellington Water – Porirua Capital Improvement Plan Optimization and Prioritization

Wellington Water provides drinking water, storm water, and sewer across five regional council areas in the south eastern tip of the North Island, New Zealand. Wellington Water engaged WCS Engineering to evaluate, optimize and prioritize wastewater network improvement alternatives for the Porirua wastewater catchment and produce a preliminary master plan strategy. Optimization scenarios were performed… Read More

Christchurch City Council – City-Wide Optimization

Christchurch has a large and complex wastewater network serving 384,000 people. Past efforts to reduce wet weather overflows were based on traditional trial-and-error modelling, and the system upgrades stemming from those modelling efforts have not been as effective as hoped, despite costing more than $150 million.  Even with those upgrades in place, there remains an… Read More

North Shore City Council, Auckland (Watercare) – City-Wide Wastewater Optimization

The improvement options identified for the North Shore City Council (NSCC) collection system included parallel sewer augmentations, new flow path alternatives, pump station upgrades, inflow and infiltration (I/I) reduction, flow control storage facilities and wastewater treatment plant (WWTP) upgrades. The optimization was performed using genetic algorithm-based software Optimizer WCS and the results were compared to… Read More