In 2002, more than 16 million people lived there, at the time nearly one-third of the population of Italy. The vast valley around the Po is called the Po Basin or Po Valley (Italian Pianura Padana or Val Padana) in time it became the main industrial area of the country.
The Po is the longest river in Italy at its widest point its width is 503 m (1,650 ft). The former contains a reservoir dammed at the Po end and so technically constitutes part of its basin, although it contributes little to the water flow as the water is, by definition, retained by the dam. These can be found on the Mont Cenis and Mongenevre passes. Further minuscule parts of the Po's basin (measurable in the hundreds of metres of linear distance) within France are found in the form of small streamheads forced into France by the 1947 post war Peace Treaty of Paris as a punitive measure against Italy. Valle Etroite is so remote it is essentially administered by Italy (telephone network, rubbish collections etc.). (The southern two thirds of Lake Maggiore and the southern half of the continuing Ticino River tributary are in Italian territory).Ī minute section of the Po basin belongs to France in the Valle Etroite (literally, the Narrow Valley) running from Mont Thabor to the Italian ski resort of Bardonecchia. The major tributary in question is the northern source half of the eponymous Ticino river (fed by its Moesa tributary in Grigioni) and the top third of the Alpine lake, Maggiore, formed by it. Almost all of the rest of the non-Italy basin is in the Italian speaking Ticino (Tessin) canton in Switzerland, and the outlying extreme south western section (again, Italian speaking) of Grigioni (Graubunden) canton lying to the south of the San Bernardino pass which forms the Po's watershed with the Posterior Rhine. The slope of the Po's river valley decreases from 0.35% in the west to 0.14% in the east, a low gradient. The Po has a drainage area of 74,000 km 2 in all, 70,000 of those being in Italy, of which 41,000 is in montane environments and 29,000 on the plain. The Po valley was the territory of Roman Cisalpine Gaul, divided into Cispadane Gaul (south of the Po) and Transpadane Gaul (north of the Po). 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. It is connected to Milan through a net of channels called navigli, which Leonardo da Vinci helped design. The river flows through many important Italian cities, including Turin, Piacenza, Cremona and Ferrara. Consequently, over half its length is controlled with argini, levees. As a result of its characteristics, the river is subject to heavy flooding. It is characterized by its large discharge (several rivers over 1,000 km have a discharge inferior or equal to the Po). The Po then extends along the 45th parallel north before ending at a delta projecting into the Adriatic Sea near Venice. The headwaters of the Po are a spring seeping from a stony hillside at Pian del Re, a flat place at the head of the Val Po under the northwest face of Monviso. The Po flows either 652 km (405 mi) or 682 km (424 mi) – considering the length of the Maira, a right bank tributary. It is a river that flows eastward across northern Italy starting from the Cottian Alps. The Po ( / p oʊ/ POH, Italian: Latin: Padus or Ēridanus Ancient Greek: Πάδος, romanized: Pádos, or Ἠριδανός, Ēridanós Ancient Ligurian: Bodincus or Bodencus) is the longest river in Italy.
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