The south-east coast drainage division is the very long, narrow area of southern Australia between the Great Dividing Range and the sea. It includes the small part of south-eastern South Australia which lies to the east of the Murray-Darling Basin, and all of coastal Victoria and coastal New South Wales. While the southern, eastern, and western boundaries are clearly defined by geography, the northern boundary is arbitrarily defined as the New South Wales - Queensland border.
Southeast coast drainage division at the Biodiversity Information Resources and Data