August 2021
PDF | 4 MB
2004
PDF | 3 MB
August 2023
PDF | 1 MB
March 2022
PDF | 2 MB
June 2022
PDF | 11 MB
May 2023
PDF | 508 KB
State of the Environment monitoring in Pleasant River Estuary to assess trends in the deposition rate, mud content, and oxygenation of intertidal sediments.
June 2023
PDF | 8 MB
NIWA study of sediment sources which have led to dense algae, low oxygen, and mud buildup in the the Pleasant River Catchment and Estuary.
December 2017
PDF | 2 MB
March 2022
PDF | 274 KB
June 2022
PDF | 13 MB
May 2017
PDF | 2 MB
March 2023
PDF | 437 KB
August 2018
PDF | 1 MB
January 2009
PDF | 2 MB
May 2023
PDF | 17 MB
The survey showed that Waipati River Estuary is overall in a healthy state. It's one of the few estuaries in Otago with a natural transition from salt marsh to freshwater wetland to indigenous forest.
June 2023
PDF | 5 MB
Tahakopa Estuary is in a healthy state overall, with a catchment boasting a considerable area of indigenous forest, despite some areas developed for farmland and exotic forestry.
March 2023
PDF | 447 KB
June 2022
PDF | 7 MB
June 2022
PDF | 19 MB
August 2022
PDF | 43 MB
June 2021
PDF | 5 MB
March 2022
PDF | 283 KB
July 2023
PDF | 6 MB
June 2021
PDF | 22 MB
June 2023
PDF | 5 MB
April 2008
PDF | 2 MB
June 2018
PDF | 5 MB
June 2019
PDF | 1 MB
May 2018
PDF | 3 MB
June 2020
PDF | 12 MB
June 2022
PDF | 32 MB
June 2023
PDF | 5 MB
March 2023
PDF | 381 KB
July 2020
PDF | 11 MB
May 2018
PDF | 3 MB
June 2019
PDF | 1 MB
To assess the impact of future changes on Tokomairiro Estuary, ORC asked NIWA to evaluate its eutrophication susceptibility using the NZ Estuary Trophic Index.
June 2018
PDF | 5 MB
November 2009
PDF | 1 MB
Otago Regional Council State of the Environment Report
November 2023
PDF | 1 MB
June 2023
PDF | 8 MB
January 2009
PDF | 1 MB
June 2021
PDF | 16 MB
July 2015
PDF | 9 MB
April 2023
PDF | 766 KB
June 2022
PDF | 41 MB
March 2023
PDF | 508 KB
State of the Environment monitoring in Pleasant River Estuary to assess trends in the deposition rate, mud content, and oxygenation of intertidal sediments.
June 2022
PDF | 7 MB
May 2017
PDF | 4 MB
May 2017
PDF | 3 MB
May 2018
PDF | 1 MB
March 2023
PDF | 398 KB
March 2007
PDF | 5 MB
August 2016
PDF | 6 MB
Characterisation of the hydrodynamics and investigation of the influence of summer low flows on the physical and chemical condition of the estuary.
May 2017
PDF | 2 MB
March 2023
PDF | 339 KB
October 2022
PDF | 550 KB
January 2017
PDF | 4 MB
January 2017
PDF | 3 MB
January 2017
PDF | 2 MB
November 2023
PDF | 747 KB
November 2022
PDF | 656 KB
November 2022
PDF | 708 KB
October 2022
PDF | 985 KB
October 2022
PDF | 3 MB
May 2024
PDF | 288 KB
Technical advice elucidating circumstances in which stock grazing can be allowed to manage natural wetland values, including whether this differs based on the type of wetland and/or the type of stock.- Implications of Porps Decisions Wetland Grazing
2025
PDF | 3 MB
The current report describes the results of annual sediment plate monitoring undertaken in November 2024 in 11 estuaries in Otago. From north to south these are: Shag, Pleasant River (Te Hakapupu), Waikouaiti, Blueskin Bay, Pūrākaunui, Kaikorai, Akatore, Tokomairiro, Catlins (Pounawea), Tautuku, and Waipati River (Chaslands) estuaries
July 2023
PDF | 867 KB
August 2023
PDF | 5 MB
July 2022
PDF | 3 MB
June 2022
PDF | 2 MB
The report places the Otago wetlands in a national context, describes the types and diversity of wetlands in the region, and provides an account of wetlands in each of the Freshwater Management Units and Rohe developed for the Otago Region.
July 2007
PDF | 296 KB
This publication gives an overview of the Upper Taieri River Scroll Plain, which is protected by the Otago Regional Council as a "significant wetland"
September 2021
PDF | 875 KB
Guidance to support the interpretation of the National Policy Statement for Freshwater Management 2020 and the Resource Management (National Environmental Standards for Freshwater) Regulations 2020.
