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Wainuiomata Model Build and Calibration RFP

Closing 20 Feb 2026
Wellington
Wellington Water Limited

Opportunity details

Open
The project is to undertake the calibration of the Wainuiomata catchment using information from flow monitoring data. A flow survey was undertaken in 2025 consisted of 11 (3 Historical) HVQ gauges, 2 v notch weirs and 9 (5 Historical) level only instrumentation. The rainfall is based on 2 raingauges, but there is the possibility that rainfall radar could be utilised to represent data gaps or that…
The project is to undertake the calibration of the Wainuiomata catchment using information from flow monitoring data. A flow survey was undertaken in 2025 consisted of 11 (3 Historical) HVQ gauges, 2 v notch weirs and 9 (5 Historical) level only instrumentation. The rainfall is based on 2 raingauges, but there is the possibility that rainfall radar could be utilised to represent data gaps or that refinement of spatial variation. The main activities will include the following:

• Hydraulic Model Calibration using both the Short Term and Long Term Flow Survey data.
• Validation of the model performance against observed network information (flooding and spill data) and using Long Time Series Rainfall data as appropriate.
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Timeline

Closes in 1w 3d

Open Date

Tender opened

26 Jan 2026

14 days ago

Closing Date

Tender closing

20 Feb 2026

in 11 days

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