Lysakerelven

Geobox|River
name = Lysakerelven
native_name =
other_name = Lysakerelva, Fåd (old Norse)
category =
etymology = named after the area Lysaker
nickname =

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image_caption = A quiet section of the river
country = Norway
state =
region = Østlandet
district = Viken
municipality = Oslo and Bærum
parent = Oslomarkvassdragene
tributary_left =
tributary_right =
city =
landmark =
source = Bogstadvannet
source_location = Oslo | source_region = | source_country = Norway
source_elevation = 145
source_lat_d = 59.9670622 | source_lat_m = | source_lat_s = | source_lat_NS = N
source_long_d = 10.6206894 | source_long_m = | source_long_s = | source_long_EW = E
source1 =
source1_location = | source1_region = | source1_country =
source1_elevation =
source1_lat_d = | source1_lat_m = | source1_lat_s = | source1_lat_NS =
source1_long_d = | source1_long_m = | source1_long_s = | source1_long_EW =
source_confluence =
source_confluence_location = | source_confluence_region = | source_confluence_country =
source_confluence_elevation =
source_confluence_lat_d = | source_confluence_lat_m = | source_confluence_lat_s = | source_confluence_lat_NS =
source_confluence_long_d = | source_confluence_long_m = | source_confluence_long_s = | source_confluence_long_EW =
mouth = Lysakerfjorden
mouth_location = Lysaker | mouth_region = Akershus | mouth_country = Norway
mouth_elevation = 0
mouth_lat_d = 59.9114493| mouth_lat_m = | mouth_lat_s = | mouth_lat_NS = N
mouth_long_d = 10.6417608 | mouth_long_m = | mouth_long_s = | mouth_long_EW = E
length = 7.4
width =
depth =
volume =
watershed = 178
discharge = 4.0
discharge_max = 80
discharge_min = 0.5
free = | free_type =


map_caption =
map_background =
map_locator =
map_locator_x =
map_locator_y =
website =
footnotes =

Lysakerelven (also known as Lysakerelva, in either case meaning "the Lysaker River") is a river in Norway that forms the boundary between the municipalities of the capital city of Oslo and Bærum.

The river by this name has its source in Bogstadvannet, though the source is further up, at Langlivann, and Søndre and Nordre Heggelivann in Oslomarka, the forests surrounding Oslo. Consequently, it is considered part of Oslomarkvassdragene, the river system flowing through these forests. It flows out into Lysakerfjorden, part of Oslofjorden near Lysaker.cite news
first = Åsmund
last = Sæther
authorlink =
author =
coauthors =
title = Lysakerelva
url = http://osloogakershus.miljostatus.no/msf_themepage.aspx?m=2529
format =
work = Miljøstatus i Oslo og Akershus ("State of Environment in Oslo and Akershus")
publisher = Fylkesmannen i Oslo og Akershus
location = Oslo
id =
pages =
page =
date = 2006-08-10
accessdate =
language = Norwegian
quote =
archiveurl =
archivedate = ] [cite news
first =
last =
authorlink =
author =
coauthors =
title = Lysaker- og Sørkedalsvassdraget
url = http://www.friluftsetaten.oslo.kommune.no/elver/lysakerelva/
format =
work =
publisher = Municipality of Oslo - Recreational section
location = Ullern
id =
pages =
page =
date =
accessdate =
language = Norwegian
quote =
archiveurl =
archivedate = - main site for all matters related to Lysakerelva.]

Recreation

The river is convert|7.4|km|mi long, with a total fall of convert|145|m|ft. It includes several smaller rapids and waterfalls, the most prominent of these being Granfossen, often known as Fåbrofossen. In later years, the area around the river has been developed as a recreational area, and a footpath follows the entire length of the river on both the Oslo and Bærum sides, so that it is possible to hike around the entire river, from the Oslofjord to Bogstadvannet on one side, and back on the other. Further, the footpath connects to the network of paths throughout the forests outside Oslo, and those around the Oslofjord [One of the main underground thoroughfares, Ring 3 (Oslo) goes directly underneath Lysakerelven just north of Granfossen in Granfosstunnelen] . The path on the Oslo side is also suitable for cycling. The terrain and scenery is quite varied along the footpaths, ranging from significant hills to flat and undulating stretches. Some of the rapids are strong enough that the river is used for kayak training; other places swimming has become popular. [cite news
first = Olav
last = Harlem
authorlink =
author =
coauthors =
title = Grenselangs
url = http://www.budstikka.no/multimedia/archive/00096/070414_Ukens_Tur_96322a.pdf
format =
work =
publisher = Asker og Bærums Budstikke
location = Sandvika
id =
pages =
page =
date = 2007-04-14
accessdate =
language = Norwegian
quote =
archiveurl =
archivedate = ] [cite news
first =
last =
authorlink =
author =
coauthors =
title = En tur langs Lysakerelva
url = http://www.ullernhistorie.com/lysa01.htm
format =
work =
publisher = Ullern Historielag
location = Ullern
id =
pages =
page =
date =
accessdate =
language = Norwegian
quote =
archiveurl =
archivedate = - in Norwegian, but includes a virtual hike along the river] cite book |last= Terje |first= Blindheim |authorlink= |coauthors= Hilde Friis |editor= |others= |title= Naturverdier langs Lysakerelva i Oslo- og Bærum kommuner|origdate= 2006-11-28 |origyear= |origmonth= |url= https://www.baerum.kommune.no/Documents/Plan-%20og%20milj%C3%B8avdelingen/Natur-%20og%20idrettsforvaltningen/Planer%20og%20rapporter/Siste_sjanse_rapporter/Naturverdier_Lysakerelva_Oslo_B%C3%A6rum.pdf |format= |accessdate= 2008-09-26 |accessyear= |accessmonth= |edition= |series= |volume= |date= |year= |month= |publisher= [http://www.biofokus.no/ Siste Sjanse] |location= Oslo |language= Norwegian |isbn= 82-92005-78-1|oclc= |doi= |id= |pages= |chapter= |chapterurl= |quote= |ref= - a study of the natural resources along the river, financed jointly by the municipalities of Oslo and Bærum.]

Natural resources

Lysakerelven runs through a varied landscape. The basin consists mainly of spruce forest, but in the area around Bogstadvannet there is also deciduous forest. From this source, the river at first meanders to about Grinidammen (Grini dam), and then carves an increasingly deep valley into the landscape, and at the stretch around and south of Jar, it forms a canyon with a few natural pools occuring along the way. Historically, a number of mills and also manufacturing facilities were based around the river south of Bogstad, [These include the historical mills of Fossum Verk, Granfos Brug, Grini mølle, and others] but these have largely given way to large residential areas that are part of the Oslo and Bærum conurbation.

The banks of the river include a wide variety of plantlife. Though environmental conditions in the river have improved significantly in the last few decades, efforts are underway to improve it further. A study in 2006 recommended that the area be designed a "very important" natural resource, with most areas set aside as a natural reservation. The findings showed that the area around the river contained a rich diversity of plant and animal species, including 27 that are on the national IUCN Red List. A good variety of fish thrive in the river, and limited recreational fishing is permitted, particularly for trout. 68 different species of birds have been identified, among them the Dendrocopos minor (Lesser Spotted Woodpecker), which is redlisted in Norway; and the area is considered an essential habitat for passerine birds in the metropolitan Oslo area. The area serves as a wildlife thoroughfare for mammals from the forests to the coastal regions, including moose and deer, who also graze there. Squirrels, red fox, badgers and other smaller rodents make their homes in the area.

The redlisted species found in the area include 2 species of vascular plants, 8 mosses, 13 fungi, 2 insects, and 1 species of bird.

Environmental statistics

Notes

References

*Øivind Rødevand: "Turbok for Ullern". Bydel Ullern og Ullern Historielag 1999.