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.
| Status | Open |
|---|---|
| Tenderer | https://www.gets.govt.nz/WWL |
| Closing | 20 Feb 2026 4:00 PM NZDT |
| Reference | 33363885 |
| Notice Type | Request for Proposals (RFP) |
| Regions | Wellington |
| Contact Details | Procurement procurement@wellingtonwater.co.nz |
| Published | 26 Jan 2026 4:30 PM NZDT |
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