| 词条 | Lake Poorrarecup |
| 释义 |
| name = Lake Poorrarecup | other_name = | image = Lake Poorrarecup5.jpg | caption = Lake Poorrarecup December 2018 | coords = {{coord|34|25|16|S|117|13|37|E|region:AU-WA_type:waterbody|display=inline,title}} | pushpin_map = Australia Western Australia | pushpin_map_alt = | pushpin_label_position = top | pushpin_map_caption = Location in Western Australia | image_bathymetry = | caption_bathymetry = | location = Western Australia | type = saline | catchment = {{cvt|94|km2}}[1][2] | basin_countries = Australia | length = {{cvt|1.85|km}}[1] | width = {{cvt|1.45|km}}[1] | area = {{cvt|1.99|km2}}[1] | depth = {{cvt|3|m}} maximum[1] | shore = {{cvt|5.1|km}}[1] | islands = none | sections = | cities = }}Lake Poorrarecup, also known as Poorarecup Lagoon,[2] is an ephemeral salt lake located in the Great Southern region of Western Australia, approximately {{cvt|34|km}} south west of Cranbrook and {{cvt|65|km}} north west of Mount Barker. It is located in a watershed between the Kent River and Frankland River catchments and the Gordon River, a tributary of the Frankland.[9] DescriptionThe lake was once freshwater but became saline by 1967[10] as a result of deforestation within the catchment area and lower rainfall.[1] It has a surface area of {{cvt|1.99|km2}}, and holds {{cvt|4.98|GL}} with a maximum depth of {{cvt|3|m}} at full capacity. The catchment area occupies an area of approximately {{cvt|94|km2}} but only {{cvt|59|km2}} drains directly into the lake. The remainder drains into a number of smaller seasonal lakes and swamps further downstream with a total area of {{cvt|3.8|km2}}.[1] The lake has a roughly circular shape and is on the remnants of a plateau[3] at an elevation of {{cvt|225|m}}.[1] The salinity of the water over the past couple of decades has been 10,500 mg/L.[10] The lake is sustained by rainfall and groundwater inflow.[4] It is part of an unfenced wetland vegetation buffer zone with a width of {{cvt|38|to|350|m}} from the edge of the wetland.[2] CatchmentThe catchment area is flat or gently undulating, and few well-defined drainage courses are found. Surrounding catchments also have mature landforms but also have a degree of dissection with reasonably well defined drainage lines. Some of the surrounding lakes include Lake Matilda and Lake Balicup. The entire area is underlain by sediments of Tertiary or Quaternary age, which overlay Precambrian granites and migmatites. The low hills in the landscape are often capped with pisolitic laterite, but sandy lunettes, that were once ancient dunes, generally occur parallel to the lake margins.[4] The area recorded an average annual inflow of {{cvt|2.65|GL}} between 1973 and 2001; approximately 78% of the water evaporated. The lake has neither dried up nor overflowed in the past two decades.[5] VegetationApproximately 50% of the natural forests[2] have been cleared for agricultural development. The native vegetation within the catchment area is predominantly jarrah (Eucalyptus marginata) woodlands with mixed jarrah, wandoo (Eucalyptus wandoo, and swamp yate Eucalyptus occidentalis) forest in more elevated and sandy areas. In the wide drainage lines and swampy part woodlands of paperbark (species of Melaleuca including Melaleuca cuticularis), Banksia species with sedge swamps are found. Sandy flats support woodlands with a mix of jarrah, marri (Eucalyptus calophylla), wandoo and swamp yate.[5] Ruppia megacarpa, a form a seagrass, is found on the floor of the lake and deposits of seagrass wrack are found on the shoreline.[2]HistoryThe traditional owners of the area are the Noongar peoples,[6] who have inhabited the region for tens of thousands of years. Settlers arrived in the latter part of the 19th century, with large cattle leases being held in the area in the 1920s.[7] In 1959 women's changerooms and a playground were constructed on the margin of the lake, and a kiosk was built in 1961. New Years Day picnics were regularly held at the site and in 163 over 2,500 people attended. Red perch were introduced into the lake in 1967. The Doris Haynes Memorial Park that surrounds part of the lake was opened in 1975 and the Junior Farmer's Club built a wall in the same year and fishing was permitted. The red perch were no longer found in the lake by 1977 as a result of salinity.[25] In November 1999 comprehensive water quality monitoring commenced.[2] In 2007 the Lake Poorrarecup Upgrade Committee was formed and the boat ramp was upgraded and new eco-toilets were installed.[8] The lake is the largest of over one hundred lakes and swamps[4] within the Shire of Cranbrook, and is used as a recreational area during the warmer months for swimming and water skiing. Facilities at the site include changerooms, parking, sheltered areas and toilets. Camping is permitted around the lake but camping fees of {{AUD}}20 per night per vehicle apply.[9] See also
References1. ^1 2 {{cite|title=Measurements taken from Google Earth|date=1 January 2019}} {{DEFAULTSORT:Poorrarecup, Lake}}2. ^1 2 3 4 5 {{cite web|url=http://www.rivercare.southcoastwa.org.au/activities/wetsurvey/reports/poorarecup_lagoon.pdf|title=Poorarecup Lagoon|date=June 2008|accessdate=2 January 2019|publisher=South Coast Rivercare|work=South Coast Wetland Monitoring Project}} 3. ^{{cite web|url=https://researchlibrary.agric.wa.gov.au/cgi/viewcontent.cgi?article=1002&context=bulletins|title=South west hydrological information package: understanding and managing hydrological issues on agricultural land in the south west of Western Australia|author1=Peter J. Tille|author2=T W. Mathwin|author3=Richard J. George|year=2001|accessdate=1 January 2019|publisher=Department of Agriculture and Food, Western Australia, Perth}} 4. ^1 2 3 {{cite web|url=http://www.dmp.wa.gov.au/Documents/About-Us-Careers/AnnualReport_1978.pdf|title=Salinization and the approximate salt balance of Lake Poorrarecup|accessdate=1 January 2019|work=Annual Report|year=1978|publisher=Department of Mines}} 5. ^1 2 3 4 5 6 7 {{cite web|url=https://www.water.wa.gov.au/__data/assets/pdf_file/0012/1641/42691.pdf|title=Hydrology of Lakes Nunijup, Poorrarecup and Carabundup|work=Salinity and Land Use Impacts Series|author1=M.A.Bari|author2=J.De Silva|year=2009|publisher=Department of Water}} 6. ^{{cite web|url=https://www.dpc.wa.gov.au/swnts/Documents/Map%20of%20Wagyl%20Kaip%20and%20Southern%20Noongar.pdf|title=Wagyl Kaip and the southern Noongar land use agreement|accessdate=1 January 2019|publisher=Department of Premier and Cabinet}} 7. ^1 2 {{cite web|url=https://www.water.wa.gov.au/__data/assets/pdf_file/0013/3334/45006.pdf|title=Salinity Situation Statement Kent River|author=J.De Silva, M.A.Bari, R.N.MDixon, M.L.Coppolina, L.H.Boniecka and B.H.Ward|date=May 2007|accessdate=1 January 2019|work=Water Resource Technical Series|publisher=Department of Water, Western Australia}} 8. ^1 {{cite|title=Signage at the Lake|date=30 December 2018}} 9. ^{{cite web|url=https://www.cranbrook.wa.gov.au/visitors/what-to-see/lakes|title=Lakes - Lake Poorrarecup|accessdate=1 January 2019|publisher=Shire of Cranbook}} 2 : Lakes of the Great Southern (Western Australia)|Saline lakes of Western Australia |
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