Qualla: Vasse-Wonnerup Estuary https://qualla.com/vasse-wonnerup-estuary en-us © 2026 Bendyline Mon, 20 Jul 2026 10:21:26 GMT Qualla serial false Qualla support@bendyline.com yes https://qualla.com/_m/q/d/4/0/vasse-wonnerup-estuary-wp/hero-small.webp Qualla: Vasse-Wonnerup Estuary https://qualla.com/vasse-wonnerup-estuary Vasse-Wonnerup Estuary: Introduction https://qualla.com/vasse-wonnerup-estuary/ Photo credit Tsun-Thai_Chai (talk) (Uploads), CC BY-SA 3.0. The floodgates were meant to stop flooding. Installed around 1907 at the mouths of the Vasse and Wonnerup inlets near Busselton, they regulated tidal flow to protect the growing settlement and its farmland from inundation. What nobody planned was that by controlling saltwater intrusion, the gates would create a vast freshwater wetland where none had existed before. Over the following century, that accidental ecosystem became one of the most important waterbird habitats in southwestern Australia -- home to over 20,000 birds across more than 80 species, and significant enough to earn international protection under the Ramsar Convention.

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]]> Fri, 27 Mar 2026 00:00:00 GMT https://qualla.com/_m/q/d/4/0/vasse-wonnerup-estuary-wp/qd40-vasse-wonnerup-estuary-intro.mp3 0:06 1 full Vasse-Wonnerup Estuary: An Estuary Remade https://qualla.com/vasse-wonnerup-estuary/ Photo credit Tsun-Thai_Chai (talk) (Uploads), CC BY-SA 3.0. The Vasse-Wonnerup Estuary spreads across 17.8 square kilometers of coastal plain near Busselton, with a central basin covering 7.5 square kilometers. Four rivers feed it -- the Abba, Ludlow, Sabina, and Vasse -- draining a catchment of 961 square kilometers that is part of the b...

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]]> Fri, 27 Mar 2026 00:00:00 GMT https://qualla.com/_m/q/d/4/0/vasse-wonnerup-estuary-wp/qd40-vasse-wonnerup-estuary-an-estuary-remade.mp3 0:06 2 full Vasse-Wonnerup Estuary: Twenty Thousand Wings https://qualla.com/vasse-wonnerup-estuary/ Photo credit Tsun-Thai_Chai (talk) (Uploads), CC BY-SA 3.0. What draws the birds is the dry-season freshwater habitat -- a scarce resource in a Mediterranean climate where most wetlands shrink or vanish by summer. An estimated 20,000 waterbirds use the estuary annually, representing more than 80 species. Black-winged stilts wade the shall...

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]]> Fri, 27 Mar 2026 00:00:00 GMT https://qualla.com/_m/q/d/4/0/vasse-wonnerup-estuary-wp/qd40-vasse-wonnerup-estuary-twenty-thousand-wings.mp3 0:06 3 full Vasse-Wonnerup Estuary: Nutrients and Suffocation https://qualla.com/vasse-wonnerup-estuary/ Photo credit Tsun-Thai_Chai (talk) (Uploads), CC BY-SA 3.0. The same agricultural clearing that shaped the catchment now threatens the estuary's health. With 52 percent of the surrounding land cleared, nutrient-laden runoff pours into the waterway -- phosphorus in particular, washed from fertilized pastures and the sandy, easily waterlogg...

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]]> Fri, 27 Mar 2026 00:00:00 GMT https://qualla.com/_m/q/d/4/0/vasse-wonnerup-estuary-wp/qd40-vasse-wonnerup-estuary-nutrients-and-suffocation.mp3 0:06 4 full Vasse-Wonnerup Estuary: Seen from Above https://qualla.com/vasse-wonnerup-estuary/ Photo credit Tsun-Thai_Chai (talk) (Uploads), CC BY-SA 3.0. From the air, the Vasse-Wonnerup Estuary is a patchwork of water, green, and brown spreading east of Busselton's town grid. In winter, the basin gleams with open water, its edges soft with vegetation. By late summer, the water contracts, concentrating birds into smaller pools and...

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]]> Fri, 27 Mar 2026 00:00:00 GMT https://qualla.com/_m/q/d/4/0/vasse-wonnerup-estuary-wp/qd40-vasse-wonnerup-estuary-seen-from-above.mp3 0:06 5 full