Mandora Marsh
Mandora Marsh, also known as Mandora Salt Marsh, is a complex and diverse wetland system in Western Australia close to Eighty Mile Beach, and included in the Eighty Mile Beach Ramsar Site. It lies at the western edge of the Great Sandy Desert bioregion and within the Mandora Station pastoral lease. The marsh is part of the 3337 km2 Mandora Marsh and Anna Plains Important Bird Area, identified as such by BirdLife International because of its importance for supporting large numbers of waders and waterbirds.
Mandora Marsh has formed over thousands of years on what used to be the lower reaches and estuary of an ancient river. The main features are two large lakes which are flooded after heavy cyclonic rainfall. The westernmost Lake Walyarta 19°46′S 121°17′E / 19.767°S 121.283°E is a claypan that extends eastwards about 30 km from the inland side of the Great Northern Highway. Although its width may reach 5 km, the depth of water never exceeds 2 m. The eastern lake 19°47′S 121°35′E / 19.783°S 121.583°E is separated from Walyarta by a calcrete ridge. It is a broad and braided drainage line containing islands of vegetation that floods extensively but soon dries out to a series of isolated salt and claypans. Connecting the lakes is Salt Creek, a mangrove-lined watercourse about 5 km long and 20 m wide. It holds permanent water and appears to be fed by a series of soaks.
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