Wainuiomata Model Build and Calibration RFP

Description

RFx ID: 33363885 Organisation: Wellington Water Limited Open date: Monday, 26 January 2026 4:30 PM +13:00 Close date: Friday, 20 February 2026 4:00 PM +13:00 Categories: 83101500 - Water and sewer utilities Region: Wellington Overview: 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.