Olona
Origin	Principal source at Fornaci della Riana at 548 m (Rasa di Varese). Other springs are at Monte Martica (937 m), Passo Varrò (760 m), Alpe Ravetta (618 m), Pian Waldes (720 m) and Miniera Valvassera (450 m)
Mouth	Po river. The Po ( Latin: Padus, Po Ligurian: Bo, Greek: Eridanus) is a river that flows 652 km(405 miles (682 km by considering
Basin countries	Italy
Length	131 km
Source elevation	548 m
Avg. A drainage basin is an extent of Land where Water from Rain or Snow melt drains downhill into a body of water such as a River, Italy (Italia officially the Italian Republic, (Repubblica Italiana is located on the Italian Peninsula in Southern Europe, and on the two largest discharge	14 m²/s
Basin area	1038 km²

The Olona is a 131 km long Italian river, which runs through the provinces of Varese, Milan and Pavia. In Hydrology, the discharge or outflow of a River is the volume of Water transported by it in a certain amount of time Italy (Italia officially the Italian Republic, (Repubblica Italiana is located on the Italian Peninsula in Southern Europe, and on the two largest The Province of Varese (Italian Provincia di Varese) is a province in the Lombardy region of Italy. The Province of Milan (Provincia di Milano Western Lombard (non-official lmo ''Provincia de Milan''/lmo ''Pruìncia de Milàn'' is a province in the

The Olona river in Nerviano

The Olona has more than one source; in fact it has six main springs. Three springs are located in the Rasa Valley, just above Varese, whereas other three springs pour water down from the southern side of pleasant Valganna - since 1877 these still clean and fresh mountain waters were historically used, and still are, to make beer in a renowned local brewery, Poretti, now run by Carlsberg. See Edgard Varèse for the composer Varese (vaˈreze in Italian Varès in the local Lombard Dialect; Valganna is a Comune (municipality in the Province of Varese in the Italian region Lombardy, located about 60 km northwest of Beer is the world's oldest and most widely consumed Alcoholic beverage and the third most popular drink overall after water and tea A brewery is a dedicated building for the making of Beer, though beer can be made in the home and has been for much of beer's history The Carlsberg Group (ˈkɑrlzbɚɡ is a large Brewing company founded in 1847 by J

The Olona river passes through the deep Olona Valley, cut in the poruous soils of the upper Po Valley, eventually flowing in the plain after Legnano. Po RiverThe Po Valley (Pianura Padana or Val Padana is a major geographical feature of Italy. Legnano is a town in the north-west of Lombardy, situated on the flat lands of the Po Valley between Milan and Lake Maggiore, straddling the little It is in the Olona valley part that the river gets much of the industrial pollution which has made it a byname for venomous waters for decades. Only in recent years attempts to restore the river's ecology have proven at least partially successful. After Legnano, the Olona river flows in the plain until Milan, usually contained in narrow artificial banks. Milan (Milano Milan (listen) is one of the largest cities in Italy, located in the plains of Lombardy. New expansion basins are being constructed to prevent floodings, which are rare but can be devastating under conditions of sudden intense rain in the upper river flow.

The river passes through Milan mostly under road level. Milan (Milano Milan (listen) is one of the largest cities in Italy, located in the plains of Lombardy. In Milan the Olona cedes part of its water to the Lambro meridionale, to later continue southward in the Bassa (lower Lombard Po Valley). Milan (Milano Milan (listen) is one of the largest cities in Italy, located in the plains of Lombardy. The Olona flows into the Po near San Zenone al Po. The Po ( Latin: Padus, Po Ligurian: Bo, Greek: Eridanus) is a river that flows 652 km(405 miles (682 km by considering San Zenone al Po is a commune in the Province of Pavia, Lombardy, Italy.

The Olona river counts 39 tributaries. The principal tributaries are the torrents Vellone, Bevera Varesino, Lanza (or Gaggiolo), Bozzente, Lura, Merlata and Mussa.

References

• This article was initially summarized from the article in the Italian-language Wikipedia « it:Olona » , specifically from this version. The Italian Wikipedia (Wikipedia in italiano is the Italian-language edition of Wikipedia. The Olona is a 131 km long Italian river which runs through the provinces of Varese, Milan and Pavia.