You are in site section: Online features

Signal Point Riverine Environment Group, Inc: Currency Creek

Signal Point Riverine Environment Group, Inc: Currency Creek

Bottle number: 105

About the water

Collected at: Currency Creek Mouth (upstream of barrier), Goolwa, South Australia

E: 301536, N: 6071355

View location on Google map

Collected by: Signal Point Riverine Environment Group Inc.

The Signal Point Riverine Environment Group has been involved in monitoring water quality in the lower lakes and tributaries of the Eastern Mount Lofty Ranges (EMLR) since 1993. Our monitoring activities have provided a baseline for understanding and contrasting the current changes that we are all seeing locally in our waterways. In 2002 the group developed a surface water monitoring plan and established 5 sites within the Currency Creek catchment.

The open parts of the mouth of Currency Creek proved of interest to the group, given recent drying events, and our water quality monitoring at this new monitoring location is 'event' monitoring. We provide our data through to agencies, as this is one way of getting local knowledge and efforts included into the mix of scientific investigations.

Currency Creek Mouth (upstream of barrier), Goolwa, South Australia.
Currency Creek Mouth (upstream of barrier), Goolwa, South Australia.

Water quality:

Turbidity: 30NTU
pH: 7.46 (surface water measurement)
Nitrates: 0.05mg/l (NO3 expressed as Nitrogen)
Salinity: 10,090 ┬ÁS/cm EC
Phosphates: 0.1mg/l (PO4 expressed as Phosphorus)
Dissolved oxygen: 4.9mg/l

Site in recovery mode with underlying acid sulphate soils and some remedial actions taken (see above).

ACT Waterwatch says:

Well, they seem to have the pH under control. Now for the nutrients and salt!

About the site

The Currency Creek is the last River Murray tributary on the western side of Lake Alexandrina. The area we test is usually influenced by wind driven lake water.

What's going on:

Last summer the site dried out completely (first time in living history). The very real threat of acid sulphate soils in the lower lakes have been documented and known to exist, with this site identified by the CSIRO as being one of the acid sulphate 'hotspots'. There have been aerial liming, lime barriers constructed and bio remediation plantings undertaken by agencies. Earlier this year a structure was completed across the mouth and pool level has been restored for the first time in around 3 years. The site is currently in recovery mode, but the salinity remains well above readings from 5 years ago, when the Murray River contributed flow to the site.

Monitoring for Water Quality, Vegetation health, Frog Monitoring and Monitoring for Acid Sulphate Soils for the CSIRO and local management agencies.