The 'Po' (
Latin: ''Padus'', , ancient "Eridanus") is a river that flows 652 kilometers (405 miles) eastward across northern
Italy, from
Monviso (in the
Cottian Alps) to the
Adriatic Sea near
Venice. It has a drainage area of 71,000 km² and is the longest river in Italy.
It goes through many important Italian towns, including
Turin (Torino) and (indirectly)
Milan (Milano), in
Lombardy. It is connected to Milan through a net of
channels called ''
navigli'', which
Leonardo da Vinci helped design. Near the end of its course, it creates a wide
delta (with hundreds of small channels and five main ones, called ''Po di Maestra'', ''Po della Pila'', ''Po delle Tolle'', ''Po di Gnocca'' and ''Po di Goro'') at the southern part of which is
Comacchio, an area famous for
eels. The Po valley corresponds to the Roman
Cisalpine Gaul, divided in Cispadane Gaul (South of the Po) and Transpadane Gaul (North of the Po).
The vast valley around the Po is called ''Pianura Padana'' and is so efficiently connected by the river that the whole valley became the main industrial area of the country. This river is subject to the authority of a special authority, the ''Magistrato delle Acque''.
Roman poets sometimes referred to the Po river as
Eridanus, which also has other meanings.
The main products of the farms around the river are cereals.
In 2005, water from the Po was found to contain "staggering" amounts of
benzoylecgonine, which is
excreted by
cocaine users in
urine. Based on these figures, cocaine consumption was estimated to be about 4 kg daily, or 27 doses per day per thousand young adults in areas that feed into the river--a number nearly three times higher than previous estimates.
[1]

The Po river view from Torino.
Dry up
On May 4th, 2007 the river dried up in spots completely. Italy declared a state of emergency in the northern and central regions. The dry up is due to the Alps having reduced snowfall this winter. Italy had the warmest winter in 200 Years. This is possibly related to
Global Warming. There is some discussion about filling the river up by diverting water flows from large lakes and reservoirs in the Alps.
Tributaries
Tributaries include (R from the right side, L from the left, looking
downstream):
★
Pellice (L)
★
Varaita (R)
★
Maira (R)
★
Dora Riparia (L)
★
Stura di Lanzo (L)
★
Orco (L)
★
Dora Baltea (L)
★
Sesia (L)
★
Tanaro (R)
★
Scrivia (R)
★
Agogna (L)
★
Ticino (L)
★
Lambro (L)
★
Trebbia (R)
★
Nure (R)
★
Adda (L)
★
Arda (R)
★
Taro (R)
★
Parma (R)
★
Enza (R)
★
Oglio (L)
★
Mincio (L)
★
Secchia (R)
★
Panaro (R)
References
Saltini Antonio, ''Dove l'uomo separò la terra dalle acque. Storia delle bonifiche in Emilia Romagna'', Diabasis, Reggio Emilia 2004