Chemical and physical monitoring
The water chemistry monitoring program (including the radionuclide radium-226) is conducted in Magela Creek and Gulungul Creek in the period of stream flow in order to:
- Enhance the baseline/background dataset for water chemistry upstream of Ranger.
- Detect potential mine-related changes in water quality downstream of Ranger.
The Supervising Scientist’s water chemistry monitoring program has been developed using continuous monitoring of physico-chemical parameters coupled with automatic event-based collection of water samples. Water chemistry samples are collected monthly during routine quality assurance sampling; if an electrical conductivity (EC) trigger is reached, it indicates potential mine-related change in water quality.
Details regarding the development and operation of the monitoring program can be found in the Surface water chemistry monitoring protocol to assess impacts from Ranger Mine and the Revised Ranger Mine Water Quality Objectives for Magela Creek and Gulungul Creek.
Biological monitoring
Biological monitoring techniques have been developed to assess the environmental impact of uranium mining on aquatic ecosystems downstream of ranger mine. Two early detection methods have been used:
- In-situ toxicity monitoring using freshwater snail reproduction (ceased in 2020).
- Bioaccumulation monitoring in freshwater mussels (ongoing).
Details regarding the development of the in-situ snail toxicity monitoring can be found in the Environmental monitoring protocols to assess potential impacts from Ranger minesite on aquatic ecosystems: In-situ toxicity monitoring – freshwater snail, Amerianna cumingi, reproduction test.
Monitoring data - current
These documents provide an update to the Supervising Scientist’s routine surface water quality monitoring for Magela Creek and Gulungul Creek.
Magela Creek
Gulungul Creek
Monitoring data - previous years
Magela Creek
- Magela Creek monitoring data 2022–23
- Magela Creek monitoring data 2021–22
- Magela Creek monitoring data 2020–21
- Magela Creek monitoring data 2019–20
- Magela Creek monitoring data 2018–19
- Magela Creek monitoring data 2017–18
- Magela Creek monitoring data 2016–17
- Magela Creek monitoring data 2015–16
- Magela Creek monitoring data 2014–15
- Magela Creek monitoring data 2010–14
- Magela Creek monitoring data 2002–10.
Gulungul Creek
- Gulungul Creek monitoring data 2022–23
- Gulungul Creek monitoring data 2021–22
- Gulungul Creek monitoring data 2020–21
- Gulungul Creek monitoring data 2019–20
- Gulungul Creek monitoring data 2018–19
- Gulungul Creek monitoring data 2017–18
- Gulungul Creek monitoring data 2016–17
- Gulungul Creek monitoring data 2015–16
- Gulungul Creek monitoring data 2014–15
- Gulungul Creek monitoring data 2010–14
- Gulungul Creek monitoring data 2002–10.