| 词条 | Blelham Tarn |
| 释义 |
| name = Blelham Tarn | image = Boathouse on Blelham Tarn - geograph.org.uk - 617279.jpg | alt = | caption = The boathouse on the tarn in 2007 | image_bathymetry = | alt_bathymetry = | caption_bathymetry = | location = Cumbria | coords = {{Coord|54|23|44|N|2|58|41|W|region:GB_type:waterbody|display=inline,title}} | type = natural | etymology = dark blue pool[1] | inflow = | rivers = | outflow = Blelham Beck | catchment = | basin_countries = | agency = | designation = | length = {{convert|0.66|km|abbr=on}}[2] | width = {{convert|0.257|km|abbr=on}}[1] | area = {{convert|11|ha|abbr=on}}[2] | depth = {{convert|6.8|m|abbr=on}}[2] | max-depth = {{convert|14.5|m|abbr=on}}[2] | volume = {{convert|717829|m3|acre.ft|sigfig=3}}[2] | residence_time = 50 days[3] | shore = | elevation = {{convert|47|m|abbr=on}}[2] | frozen = | website = | reference = }}Blelham Tarn is a large valley tarn in the Lake District to the north of the hill Latterbarrow. The settlements of Outgate, Low Wray and High Wray are close by. The tarn is drained to the northeast by the short Blelham Beck into Windermere. This beck was previously straightened and lowered.[4] Fish species in the tarn include brown trout, eel, perch, pike and roach,[5] much of the tarn shore is reedbed and waterfowl present can include great crested grebe, whooper swan and golden-eye.[12] The tarn is regularly monitored by the United Kingdom Lake Ecological Observatory Network and is characterised as eutrophic and monomictic[3] and has suffered from agricultural water pollution[6] with large quantities of blue-green algae in the summer.[5] The lake temperature at various depths varied over the period July 2012 to November 2014 between 2 and 25 Celsius as the air temperature (3 m above the surface) varied between -3 and 22 Celsius. Over the same period the pH varied from 6.4 to 9.8 and the dissolved oxygen ranged from 7 to 14 mg/l[7] Blelham Tarn and Bog, with a total area of 49 hectares, is designated a site of special scientific interest[8] and Blelham Bog is designated a National Nature Reserve[9] The bog contains various species of sphagnum moss, bog myrtle, cotton-grass and the white-beaked sedge; and rare caddis-flies and vertigo lilljeborgi.[9] References1. ^1 Blelham Tarn 2. ^1 2 3 4 5 {{cite web|title=Blelham Tarn Water Body ID 29270|url=https://eip.ceh.ac.uk/apps/lakes/detail.html#wbid=29270|website=UK Lakes Detail|publisher=NERC Centre for Ecology and Hydrology|accessdate=23 May 2016|deadurl=yes|archiveurl=https://web.archive.org/web/20160611204850/https://eip.ceh.ac.uk/apps/lakes/detail.html#wbid=29270|archivedate=11 June 2016|df=}} 3. ^1 UKLEON: United Kingdom Lake Ecological Observatory Network 4. ^[https://archive.is/20141125211920/http://www.sssi.naturalengland.org.uk/Special/sssi/unit_details.cfm?situnt_id=1010219 Blelham Tarn & Bog - Unit 2] 5. ^1 Blelham Tarn 6. ^Blelham Tarn & Bog - Unit 6{{dead link|date=November 2016 |bot=InternetArchiveBot |fix-attempted=yes }} 7. ^Data from the UK Lake Ecological Observatory Network 8. ^SSSI units for Blelham Tarn & Bog{{dead link|date=November 2016 |bot=InternetArchiveBot |fix-attempted=yes }} 9. ^1 2 [https://www.gov.uk/government/publications/cumbrias-national-nature-reserves/cumbrias-national-nature-reserves Cumbria's National Nature Reserves ] 4 : Lakes of the Lake District|National nature reserves in England|Sites of Special Scientific Interest in Cumbria|South Lakeland District |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。