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Freshwater management tool: report 2. Baseline configuration and performance

Author:  
Auckland Council Healthy Waters Department, Nick Brown, Tom Stephens, Theo Kpodonu, Mahesh Patel, Paradigm Environmental, Dustin Bambic, John Riverson, Khalid Alvi, David Rosa, Xiaomin Zhao, Morphum Environmental Ltd, Caleb Clarke, Hana Judd, Andrew Rosaak
Source:  
Auckland Council Healthy Waters Department
Publication date:  
2021
Topics:  
Environment

Freshwater management tool: report 2. Baseline configuration and performance

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Extract from the Executive summary

The Freshwater Management Tool (FWMT) is a continuous and process-based water quality accounting framework for the Auckland region. In its first iteration (Stage 1) contaminants simulated include total suspended solids (TSS), total and dissolved forms of nutrients (TN, DIN, TON, TAM, TP, DRP), total forms of heavy metals (TCu, TZn) and faecal indicator bacteria (E. coli). The FWMT Stage 1 simulates the generation, transport and fate of contaminants in multiple flow paths across and through land, and ultimately through instream freshwater environments.

This report documents the configuration and subsequent continuous performance of the Load Simulation Programme in C++ (LSPC) to represent instream freshwater flow and contaminant conditions. The FWMT Stage 1 hydrology and water quality model was configured using the best available data (as of mid-2017) to account for water quality conditions in the Auckland region over the calibration/validation period (2012-2016). Datasets used for configuration included high-resolution meteorology, soils, land cover and use, topography, wastewater and stormwater networks, consented water takes and discharges, spanning several years of effort by multiple New Zealand and Auckland Council agencies. ...

Appendices (in preparation)

FWMT report 2021/2

Auckland Council, September 2022

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List of Freshwater Management Tool reports

1. Baseline data inputs

2. Baseline configuration and performance | Report 2, appendices (in preparation)

3. Baseline state assessment (rivers) | Report 3, appendices (in preparation)

4. Current state assessment (lakes). Not published. Inquiries to: fwmt@aucklandcouncil.govt.nz

5. Review of the freshwater management tool. Baseline state assessment (rivers)

6. Literature review of primary sector responses to water quality: efficacy and cost

7. Riparian area management scenarios. Freshwater management tool

8. Lifecycle costs and benefits for rural mitigations in the freshwater management tool

9. A total economic valuation approach to understanding costs and benefits of intervention scenarios – part 1 urban devices

10. A total economic valuation approach to understanding costs and benefits of intervention scenarios – part 2 urban source control costs

11. Recommendations for improving rural mitigation modelling in the freshwater management tool

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Inquiries to: fwmt@aucklandcouncil.govt.nz



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