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This page is about the inlet in South Australia. For other uses, see Barker (disambiguation). The Barker Inlet is a tidal inlet of the Gulf St Vincent in Adelaide, South Australia, named after Captain Collet Barker who first sighted it in 1831. It contains one of the southernmost mangrove forests in the world, a dolphin sanctuary, seagrass meadows and is an important fish and shellfish breeding ground. The inlet separates Torrens Island and Garden Island from the mainland to the East and is characterized by a network of tidal creeks, artificially deepened channels, and wide mudflats. The extensive belt of mangroves are bordered by samphire saltmarsh flats and low-lying sand dunes, there are two boardwalks (at Garden Island and St Kilda), and ships graveyards in Broad Creek, Angas Inlet and the North Arm. The inlet has been adversely impacted since the settlement of South Australia with stormwater and raw sewage discharge, fishing, landfill rubbish dumping, power generation and other activities adversely affecting its flora and fauna. Much of this has changed with the landfill dump on adjacent Garden Island closed in 2000 and remediation work begun. Some stormwater is now being filtered through wetlands before discharge and the inlet has been declared a reserve for the preservation of dolphins, fish, crabs and aquatic plants. The mangroves and waterways are still affected by the adjacent salt crystallization pans, hot wastewater discharge from Torrens Island power station, heavy metal contamination from stormwater and treated sewage, and disturbances from boat traffic. == Physical structure == Barker Inlet is a shallow tidal inlet which, with the adjacent Port River Estuary, formed during the Holocene by the progressive extension of the Lefevre Peninsula by northward littoral drift of sand carried by wave action along the eastern shore of Gulf St Vincent.〔Bowman, G. & Harvey, N. (1986): (Geomorphic Evolution of a Holocene Beach-Ridge Complex, LeFevre Peninsula, South Australia. ) ''Journal of Coastal Research'' 2(3):345-362〕 It has a narrow central channel used for boating. Spring tides are over 2½ metres and at low tide much of the inlet is mudflats that are above water level. Most of the creeks through the mangroves drain surrounding land and are not navigable except at high tide by very small boats. There is an artificial channel, running along the side of a breakwater, from a boat ramp at St Kilda near the inlet's north end. The coast side of the mangroves are bounded by extensive salt evaporation ponds leased for industrial usage by the South Australian Government. Most of the creeks on the eastern side are tidal although ''Swan Alley creek'' is the outlet for the Dry Creek and the Little Para River, and the ''North Arm Creek'' for the Barker Inlet Wetlands. The wetlands were created in 1994 as part of a stormwater treatment system with both tidal and freshwater sections. There is 1.72 km2 of constructed wetlands holding 1.2 Gigalitres of stormwater before discharging via the creek. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Barker Inlet」の詳細全文を読む スポンサード リンク
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