Murray Mouth (35°33′29″S 138°52′50″E / 35.55806°S 138.88056°E / -35.55806; 138.88056Coordinates: 35°33′29″S 138°52′50″E / 35.55806°S 138.88056°E / -35.55806; 138.88056) is the point at which the River Murray meets the southern Southern Ocean. The Murray Mouth's location is changeable. Historical records show that the channel out to sea moves along the sand dunes over time. At times of greater river flow and rough seas, the two bodies of water would erode the sand dunes to create a new channel leaving the old one to silt and disappear.
The mouth is between two sandhill peninsulas. Sir Richard Peninsula on the northwest separates the Goolwa channel (the main river channel) from the ocean. The much longer Younghusband Peninsula separates the Coorong from the ocean on the southeast of the mouth.
The Murray Mouth is separated from Lake Alexandrina by a row of low islands. The largest one, directly facing the mouth, is Hindmarsh Island. A series of barrages join the islands, separating the salt water from the fresh water of the lakes and river. The barrages can be opened during high river flow.
Read more about Murray Mouth: Ancient History, Water Flow
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