- Tresa
Infobox River
river_name = Tresa
caption =
origin =Lake Lugano betweenPonte Tresa andLavena Ponte Tresa
mouth =Lago Maggiore atLuino
basin_countries =Switzerland ,Italy
length = 13 km
elevation = 295 m
mouth_elevation =c. 193 m
discharge = m³/s
watershed = km²The
river Tresa leavesLake Lugano at a point betweenLavena Ponte Tresa in Italy andPonte Tresa in Switzerland and flows intoLake Maggiore nearLuino , a few hundred meters after joining theMargorabbia . At the outflow from Lake Lugano the river is crossed by a bridge which unites the Swiss and Italian parts of Ponte Tresa; a customs post divides them.The river is about 13 km long and for most of its course marks the boundary between the Italian
Province of Varese and the Swiss cantonTicino . It passes through the Swiss communes ofPonte Tresa ,Croglio andMonteggio , and the Italian communes ofLavena Ponte Tresa ,Cremenaga andLuino .A dam on the river, known as the Creva dam serves two purposes: to use the difference in altitude between the lakes to produce
hydropower , and as far as possible to regulate the flow of water into Lake Maggiore in order to avoid or limit the dangers of flooding.References
External links
* [http://www.hydrodaten.admin.ch/e/2167.htm Hydrological data of the Tresa] at
Ponte Tresa
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