Editing Geography of Italy (section)

===Rivers===
[[File:Torino-mole11.jpg|thumb|The [[Po river|Po]] river in [[Turin]]]]
[[File:Roma-tevere.jpg|thumb|The [[Tiber]] river in [[Rome]]]]
Italian [[river]]s are shorter than those of other European regions due to the Apennines that run along the entire length of the peninsula, dividing the waters into two opposite sides. They are numerous however, due to the relative abundance of rains in Italy in general, and to the presence of the Alpine chain, rich in snowfields and glaciers, in northern Italy.

The fundamental [[Drainage divide|watershed]] follows the ridge of the Alps and the Apennines and defines five main slopes, corresponding to the seas into which the rivers flow: the Adriatic, Ionic, Tyrrhenian, Ligurian and Mediterranean sides.<ref name=FIUMI>{{cite book|first=Antonio|last=Londrillo|title=Alla scoperta della mia regione|publisher=Bulgarini|year=2004|isbn=88-234-2327-9|language=it|page=26}}</ref> Italian rivers are categorized into two main groups: the Alpine-Po river rivers and the Apennine-island rivers.<ref name=FIUMI />

The longest Italian river is the [[Po river|Po]] ({{cvt|652|km|disp=or}}), which flows from the [[Monviso]], runs through the entire [[Po Valley]] from west to east, and then flows, with a [[River delta|delta]], into the [[Adriatic Sea]]. In addition to being the longest, it is also the river with the largest basin and the largest flow at its mouth. The second longest Italian river is the [[Adige]] ({{cvt|410|km|disp=or}}), which originates near [[Lake Resia]] and flows into the Adriatic Sea, after having made a north–south route, near [[Chioggia]]. The third longest river in Italy is the [[Tiber]] ({{cvt|405|km|disp=or}}), the second longest Italian river in terms of hydrographic basin; it was formed on [[Monte Fumaiolo]] (in [[Emilia-Romagna]]) and flows into the [[Tyrrhenian Sea]] after having crossed the center of [[Rome]]. After the Tiber, in order of length are the rivers [[Adda (river)|Adda]] ({{cvt|313|km|disp=or}}), [[Oglio]] ({{cvt|280|km|disp=or}}), [[Tanaro]] ({{cvt|276|km|disp=or}}) and [[Ticino (river)|Ticino]] ({{cvt|248|km}}, of which {{cvt|157|km}} is in Italy).

Most of Italy's rivers drain either into the Adriatic Sea (such as Po, [[Piave (river)|Piave]], [[Adige]], [[Brenta (river)|Brenta]], [[Tagliamento]], [[Reno River|Reno]]) or into the Tyrrhenian (like [[Arno]], [[Tiber]] and [[Volturno]]), though the waters from some border municipalities drain into the [[Black Sea]] through the basin of the [[Drava]] ([[Innichen]] and [[Sexten]] in [[Trentino-Alto Adige/Südtirol]], [[Tarvisio]] in [[Friuli-Venezia-Giulia]]) or the [[Inn (river)|Inn]] ([[Livigno]] in [[Lombardy]]), both [[tributary|tributaries]] of the [[Danube]], and the waters from the [[Lago di Lei]] in Lombardy drain into the [[North Sea]] through the basin of [[Rhine]].