Otago Regional Council undertakes research on nutrient modelling, highlights strategies to reduce nutrient loads, impacts of land use, and advanced modelling techniques for better water quality.

Assessment of Escherichia coli Load Reductions to Achieve Freshwater Objectives in the Rivers of Otago

October 2021

PDF | 2 MB

Assessment of Nutrient Load Reductions to Achieve Target Attribute States in the Rivers, Lakes and Estuaries of Otago

October 2023

PDF | 8 MB

Environmental impacts of different land uses - A brief review of published literature

August 2023

Dengg, Markus; Button, Eric

PDF | 1 MB

Guidance on time frames of water quality responses to the implementation of good management practice

June 2023

PDF | 693 KB

Memorandum: Achievement of NPS-FM 2020 suspended sediment attribute bands for the Otago stream network

August 2023

PDF | 3 MB

Mitigation options to reduce nutrient loss in the Otago Region

January 2023

PFR SPTS No. 23350

PDF | 856 KB

Memorandum Test of revised periphyton nutrient criteria for Otago and Southland Regions

November 2023

Ton Snelder

LWP

PDF | 406 KB

Options for improving water quality within the Otago region: Development of GMP & GMP+ scenarios project report

November 2022

PDF | 2 MB

ORC mitigation framework model

November 2021

PDF | 1 MB

Proposed nutrient load limits for Otago estuaries

August 2021

David Plew

NIWA

2021256CH

PDF | 4 MB

This report describes the equations and parameterisations for models that can be used to predict the effects of different nutrient loads in 20 Otago coastal hydrosystems, along with predicted current eutrophication state.

Review - Mitigations for minimising nutrient loss from farming systems

November 2022

PDF | 366 KB

Review Of Mitigation Modelling And Assumptions

January 2023

PDF | 212 KB

Science approach to development of GMP and GMP plus land use scenarios - updated

June 2022

Ben Mackey

PDF | 657 KB

Development of the Land and Water Regional Plan (LWRP) requires the science team to develop a range of management scenarios to improve water quality across the Otago region. The purpose of these scenarios is to estimate the possible improvements in water quality that are achievable for a given set of interventions. The scenario modelling will be used by the ORC Policy Team to highlight the scale of intervention required to give effect to the National Policy Statement on Freshwater Management and as a tool to guide proposed LWRP management options and rules.

SedNetNZ modelling for freshwater planning in Otago

August 2022

PDF | 4 MB

Technical note: Implementing the Otago LWRP GMP+ scenario in SedNetNZ

August 2022

PDF | 3 MB

Silage Impacts to the Environment Nov 2023

November 2023

PDF | 222 KB