Finniss River (South Australia)

The Finniss River drains part of the east side of Fleurieu Peninsula into Lake Alexandrina in South Australia. It is part of the Murray–Darling basin.

Finniss River
EtymologyBoyle Travers Finniss
StateSouth Australia
Physical characteristics
  locationMount Magnificent
  coordinates35°18′39″S 138°38′21″E
MouthLake Alexandrina
Clayton Bay
35.4807°S 138.8905°E / -35.4807; 138.8905
0.7 m
Length50.1 km
Basin features
River systemMurray–Darling basin

The Finniss River starts east of Yundi and flows roughly east to its mouth in the Goolwa Channel of the lower Murray River, opposite Hindmarsh Island. It supports a wide range of flora (both natural and introduced weed species) and macroinvertebrates despite much of the catchment being cleared and grazed.[1]

During the 2006–2010 drought, low water levels in Lake Alexandrina and the outflows of the Finniss River and Currency Creek exposed acid sulfate soils which would normally be submerged. Temporary flow regulators were installed in August–September 2009 across the Goolwa Channel to maintain the water level to keep these soils wet to prevent more acid being leached out. They were partially removed in September 2010 and completely by October 2012.[2]


  1. "Finniss River, near Yundi 2015 Aquatic Ecosystem Condition Report". Environment Protection Authority of South Australia. 2015. Retrieved 3 January 2019.
  2. "Goolwa Channel Flow Regulators". Natural Resources SA Murray-Darling Basin. Retrieved 3 January 2019.
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