Lake Tuusula

{{Short description|Lake in Uusimaa region, Finland}}

{{Infobox lake

| name = Lake Tuusula

| image = Tuusulanjärvi.JPG

| caption = View to south from Tervanokka, Järvenpää.

| image_bathymetry =

| caption_bathymetry =

| location = Uusimaa

| coords = {{coord|60|26|N|025|03|E|region:FI-18_type:waterbody_source:GNS-enwiki|display=inline,title}}

| pushpin_map = Finland

| type =

| inflow =

| outflow = Tuusulanjoki

| catchment =

| basin_countries = Finland

| length = {{convert|8|km|abbr=on}}

| width =

| area = {{convert|6|km2|abbr=on}}

| depth = {{convert|3.2|m|abbr=on}}

| max-depth =

| volume =

| residence_time =

| shore =

| elevation = {{convert|37.8|m|abbr=on}}

| islands =

| cities = Tuusula, Järvenpää

}}

Lake Tuusula{{cite web|url=http://www.tuusulanrantatie.info/etusivu_eng.asp|title=Welcome|publisher=Tuusula Lake Tourism Association|quote=artists built their homes by the Lake Tuusula. The composer Jean Sibelius|accessdate=2009-12-27|url-status=dead|archiveurl=https://web.archive.org/web/20110102171923/http://www.tuusulanrantatie.info/etusivu_eng.asp|archivedate=2011-01-02}}{{cite web|url=http://www.portofhelsinki.fi/default.asp?docId=15242|title=Tourist organisations|publisher=Port of Helsinki|quote=Lake Tuusula is only half an hour's drive north from Finland's capital|accessdate=2009-12-27|url-status=dead|archiveurl=https://web.archive.org/web/20110720193027/http://www.portofhelsinki.fi/default.asp?docId=15242|archivedate=2011-07-20}} (outdated link){{cite web|url=http://www.visitfinland.com/sv_SE/web/guest/b2b/regionaltouristofficies?p_p_id=PublishingListView_WAR_PublishingPortlet_INSTANCE_ItKQ&p_p_lifecycle=0&p_p_state=normal&p_p_mode=view&p_p_col_id=tpl_3_inner_top&p_p_col_count=1&_PublishingListView_WAR_PublishingPortlet_INSTANCE_ItKQ_current=2|title=Järvenpää City Tourist Office|work=Regional Tourist Offices|publisher=Finnish Tourist Board|quote=Järvenpää Tourist Office can provide information about the Lake Tuusula|url-status=dead|archiveurl=https://web.archive.org/web/20110725225600/http://www.visitfinland.com/sv_SE/web/guest/b2b/regionaltouristofficies?p_p_id=PublishingListView_WAR_PublishingPortlet_INSTANCE_ItKQ&p_p_lifecycle=0&p_p_state=normal&p_p_mode=view&p_p_col_id=tpl_3_inner_top&p_p_col_count=1&_PublishingListView_WAR_PublishingPortlet_INSTANCE_ItKQ_current=2|archivedate=2011-07-25}} (outdated link) or Lake Tuusulanjärvi{{cite web|url=http://www.puistoblues.fi/index.php?k=20093|title=Puistoblues 2015 aka Lake Side Blues Festival|publisher=The Lakeside Blues Office|quote=...and the main event by the lake Tuusulanjärvi at Vanhankylännniemi}}{{cite web|url=http://eng.tuusulanjarvi.org/|title=Lake Tuusulanjärvi|publisher=Tuusulanjärvi-hanke (Tuusulanjärvi project)|accessdate=2015-08-01|quote = The heart of the Tuusula municipality and the town of Järvenpää is Lake Tuusulanjärvi, one of the most extensively studied lakes in Finland}}{{cite web|url=http://www.tuusula.fi/english/|title=Welcome to Tuusula|work=Tuusula municipality website|accessdate=2015-08-01|quote=The valley along Tuusula-river, and Lake Tuusulanjärvi are the lungs of Hyrylä and significant recreational areas|publisher=Municipality of Tuusula}} ({{langx|fi|Tuusulanjärvi|italics=no}}; {{langx|sv|Tusby träsk|italics=no}}) is a lake on the border of the municipalities of Tuusula and Järvenpää in Southern Finland. The lake has an area of 6.0 square kilometres. Since the beginning of the twentieth century the shores of Lake Tuusula has been an artist's colony. The houses of Aino and Jean Sibelius, Juhani Aho, Pekka Halonen, Eero Järnefelt, Joonas Kokkonen and Aleksis Kivi are on the edges of the lake.

The Lake Tuusulanjärvi Water Protection Association has taken action to save the lake from eutrophication effects since the early 1970s. Apart from wintertime water aeration and cyprinid fish removal, some additional water is being fed into the Lake via the {{convert|120|km|mi|sp=us}} long Päijänne Water Tunnel.{{cite web|url=http://eng.tuusulanjarvi.org/restoration/|title=Restoration project|publisher=Tuusulanjärvi-hanke|accessdate=2015-08-01}}{{cite web|url=http://eng.tuusulanjarvi.org/measures/|title=Measures|publisher=Tuusulanjärvi-hanke|accessdate=2015-08-01}}

File:Pekka Halonen - From Sarvikallio.jpg's From Sarvikallio (1916) depicts Lake Tuusula as seen from its western shore]]