Rotaldo
Encyclopedia
The Rotaldo, known in its upper course as the Laio, is a 40 km river (classified as a torrente) of northern Italy
, and a right-side tributary of the Po
. Most of its course falls within the Province of Alessandria
; all of it within the former Province of Casale. The river is of modest flow, heavily reliant on rainfall, with a discharge near its mouth of 1.6 m²/s.
The river is born as the Laio on the slopes of Madonna dei Monti near Grazzano Badoglio
in the Province of Asti
, close to one of the springs of the Grana del Monferrato
. Its early course makes an arc through the hills of the Basso Monferrato, heading first WSW then curving gradually to WNW, receiving the waters of a number of small streams from the left and passing through the commune of Olivola
and between Vignale Monferrato
and Frassinello Monferrato
.
At Roncaglia it is joined from the left by a second branch whose main source is in the hills near Ottiglio
and which has been joined by streams rising in Sala Monferrato
, Cella Monte
and Rosignano Monferrato
. From the right it receives streams arising in Camagna Monferrato
and Conzano
. At San Maurizio (near Occimiano
) it is joined from the left by a further branch with its origins near Terruggia
. Entering the Casalese
plain it acquires the name Rotaldo and follows a sinuous course, passing through Borgo San Martino
, Ticineto
, and Valmacca
where it is joined from the left by the Gattola
. It enters the Po at Bozzole
.
Italy
Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...
, and a right-side tributary of the Po
Po River
The Po |Ligurian]]: Bodincus or Bodencus) is a river that flows either or – considering the length of the Maira, a right bank tributary – eastward across northern Italy, from 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...
. Most of its course falls within the Province of Alessandria
Province of Alessandria
The Province of Alessandria is an Italian province, with a population of some 430,000, which forms the southeastern part of the region of Piedmont. The provincial capital is the city of Alessandria....
; all of it within the former Province of Casale. The river is of modest flow, heavily reliant on rainfall, with a discharge near its mouth of 1.6 m²/s.
The river is born as the Laio on the slopes of Madonna dei Monti near Grazzano Badoglio
Grazzano Badoglio
Grazzano Badoglio is a comune in the Province of Asti in the Italian region Piedmont, located about 50 km east of Turin and about 15 km northeast of Asti. It was the birthplace of Pietro Badoglio, for whom it was later renamed....
in the Province of Asti
Province of Asti
The Province of Asti is a province in the Piedmont region of northern Italy. Its capital is the city of Asti. To the north west it borders on the province of Turin; to the south west it borders on the province of Cuneo. To the east it borders on the province of Alessandria, while in the south it...
, close to one of the springs of the Grana del Monferrato
Grana del Monferrato
The Grana del Monferrato is a small Italian river, classified as a torrente, a right tributary of the Po, which runs almost entirely in the Province of Alessandria among the hills of the Basso Monferrato which lie between the Po to the north and the Tanaro to the south...
. Its early course makes an arc through the hills of the Basso Monferrato, heading first WSW then curving gradually to WNW, receiving the waters of a number of small streams from the left and passing through the commune of Olivola
Olivola
Olivola is a comune in the Province of Alessandria in the Italian region Piedmont, located about 50 km east of Turin and about 25 km northwest of Alessandria....
and between Vignale Monferrato
Vignale Monferrato
Vignale Monferrato is a comune in the Province of Alessandria in the Italian region Piedmont, located about 60 km east of Turin and about 20 km northwest of Alessandria...
and Frassinello Monferrato
Frassinello Monferrato
Frassinello Monferrato is a comune in the Province of Alessandria in the Italian region Piedmont, located about 50 km east of Turin and about 25 km northwest of Alessandria....
.
At Roncaglia it is joined from the left by a second branch whose main source is in the hills near Ottiglio
Ottiglio
Ottiglio is a comune in the Province of Alessandria in the Italian region Piedmont, located about 50 km east of Turin and about 25 km northwest of Alessandria....
and which has been joined by streams rising in Sala Monferrato
Sala Monferrato
Sala Monferrato is a comune in the Province of Alessandria in the Italian region Piedmont, located about 50 km east of Turin and about 30 km northwest of Alessandria...
, Cella Monte
Cella Monte
Cella Monte is a comune in the Province of Alessandria in the Italian region Piedmont, located about 50 km east of Turin and about 25 km northwest of Alessandria....
and Rosignano Monferrato
Rosignano Monferrato
Rosignano Monferrato is a comune in the Province of Alessandria in the Italian region Piedmont, located about 60 km east of Turin and about 25 km northwest of Alessandria...
. From the right it receives streams arising in Camagna Monferrato
Camagna Monferrato
Camagna Monferrato is a comune in the Province of Alessandria in the Italian region Piedmont, located about 60 km east of Turin and about 20 km northwest of Alessandria....
and Conzano
Conzano
The Commune of Conzano is a municipality lying to the south of Casale Monferrato in the north-west Italian Province of Alessandria...
. At San Maurizio (near Occimiano
Occimiano
Occimiano is a comune in the Province of Alessandria in the Italian region Piedmont, located about 60 km east of Turin and about 20 km northwest of Alessandria...
) it is joined from the left by a further branch with its origins near Terruggia
Terruggia
Terruggia is a comune in the Province of Alessandria in the Italian region Piedmont, located about 60 km east of Turin and about 25 km northwest of Alessandria. As of 31 December 2004, it had a population of 825 and an area of 7.2 km².Terruggia borders the following municipalities:...
. Entering the Casalese
Casale Monferrato
Casale Monferrato, population 36,058, is a town and comune in the Piedmont region of north-west Italy, part of the province of Alessandria. It is situated about 60 km east of Turin on the right bank of the Po, where the river runs at the foot of the Montferrato hills. Beyond the river lies the...
plain it acquires the name Rotaldo and follows a sinuous course, passing through Borgo San Martino
Borgo San Martino
Borgo San Martino is a comune in the Province of Alessandria in the Italian region Piedmont, located about 60 km east of Turin and about 20 km northwest of Alessandria....
, Ticineto
Ticineto
Ticineto is a comune in the Province of Alessandria in the Italian region Piedmont, located about 70 km east of Turin and about 20 km north of Alessandria....
, and Valmacca
Valmacca
Valmacca is a comune in the Province of Alessandria in the Italian region Piedmont, located about 70 km east of Turin and about 20 km north of Alessandria in an area of plain on the right of the Po River at the confluence of the Rotaldo and the Gattola...
where it is joined from the left by the Gattola
Gattola
The Gattola is a stream of the Basso Monferrato in north-west Italy, a left tributary of the Rotaldo. In 1836 it was of sufficient importance to be listed in the Dizionario geografico, storico, statistico, commerciale degli stati di S.M...
. It enters the Po at Bozzole
Bozzole
Bozzole is a comune in the Province of Alessandria in the Italian region Piedmont, located about 70 km east of Turin and about 15 km north of Alessandria...
.