Secchi Marine Project

Secchi Marine Project

Secchi Disk Monitoring – Gulf of St Vincent

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Secchi Disk Monitoring Project

There has been growing concern, in the past decades, about the deterioration of water quality and the marine environment in Gulf St Vincent. This has led to a number of long-term studies investigating the causes and effects of pollution from metropolitan and rural sources.

It is now understood that wastewater, industrial discharges and stormwater carrying pollutants (particularly nutrients) are the major culprit in the extensive loss of seagrasses (and their associated marine life) off Adelaide and other coastal regions.

Secchi Disk Monitoring is operated by volunteers and coordinated by the Friends of Gulf St Vincent based in Adelaide, South Australia.

The Secchi Project provides a baseline and record of trends, and helps to educate about the sources and impacts of pollution.

The Secchi Disk is a relatively simple and inexpensive way to measure water clarity – the black and white disc is lowered into the water until it is no longer visible. This distance is the ‘Secchi Depth’.

Measuring Locations

  • Bluff Point Jetty
  • Brighton Jetty
  • Edithburgh Jetty
  • Garden Island Jetty
  • Glenelg Jetty
  • Goolwa Murray Mouth
  • Grange Jetty
  • Granite Island Jetty
  • Henley Beach Jetty
  • Largs Bay Jetty
  • Normanville Jetty
  • Outer Harbor Boat
  • Outer Harbor Boat2
  • Port Elliott Jetty
  • Port Noarlunga Jetty
  • Port River – Harts Mill
  • Port River – Portside
  • Port Vincent Boat
  • Port Vincent Jetty
  • Port Vincent Marina
  • Rapid Bay Jetty
  • Second Valley Jetty
  • Semaphore Jetty
  • Stansbury Jetty
  • Victor Harbor School Bridge
  • West Beach Boat Harbour
  • Wirrina Marina

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