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The Trebbia river rises from the slopes of the Mount Prelà (mt.
1406) one of the peaks which forms the important orographic
knot of the Mount Antola. At first it flows into a little
valley parallel to the ridge which separates the basin of
Torriglia from the Trebbia Valley; beyond the Buffalora gallery
it bends northwards and it is enriched by numerous streams
which flow down from the two slopes.
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Once the Brugneto stream used to flow into the Trebbia
river near Montebruno, , with the wide impluvium of
the southern slope of the Mount Antola. In 1959 a dam
was built to form a vast artificial basin. The Brugneto
lake, on which the communes of Propata and Rondanina
and part of the commune of Torriglia overlook, has
notably influenced the valley. The increase of damp
air has favoured the development of shrubby plants
which, due to abandonment of woods, have invaded grounds
once bound to haymaking and pasture.
Near Montebruno the Trebbia river has a big water capacity:
in 1537 Giustiniani wrote the "Descrittione" dedicated
to the Trebbia Valley: "And past the col
(...)the Trebbia river has origin from three small
brooks."
From the left slope, in Due Ponti village, the virgin
waters of the Cassingheno stream flows into the Trebbia
river, running through the picturesque homonym valley
where Fascia is located. |
Other streams runs through valleys and
get into depth: the Terenzone, rising from the Eastenr
slopes of the Mount Carmo (mt 1640), flows into the Trebbia
river near Gorreto. It forms a green valley in which the
picturesque villages of Alpe, Bertassi, Fontanarossa and
Varni are found.
From the Mount Ronconovo (mt 1523), in the group of the
Mount Alfeo (mt 1650), the Dorbera river flows down, while
the Boreca river runs into the wide and silent basin among
the Alfeo, the Cavalmurone (m 1670) and Lesima Mountains
(mt 1724) . These valley villages, hidden by the greenness,
form the commune of Zerba: boundless woods of chestnut
trees, beech trees, hornbeams entirely cover up the slopes
by the sour and wild features.
The Avegnone stream flows into the Trebbia river near the
Organasco Bridge, surrounded by the Mount Lesima and the
orographic knot of the Mount Penice. It forms a valley,
part of Pavia Province, at the end of which the commune
of Brallo di Pregola is located.
On the other hand the Avegnone valley is open on cultivated
grounds such as vineyards and it features several villages.
From the right slopes smaller streams flow into the Trebbia
river: the Sermigliasca stream forms the valley where Canale
and Casoni are found; the Pescia flows down from the wide
and tormented basin of Fontanigorda and Casanova.
Beyond
Rovegno numerous streams, flow down into the Trebbia
river from the right bank but the watershed line of the
Aveto Valley is close and therefore their course is brief.
From Organasco Bridge the Trebbia river course suddenly
changes direction, pointing towards Northeast and meeting
the Aveto river in Confiente after a steep gorge where
some meanders can be admired among the most picturesque
ones of the valley.
Right after this confluence the Trebbia
River, enriched of water, returns flowing northwards
and after the brief line of the Marsaglia plain, it
is surrounded by banks dominated by the Brugnello fortress,
the more spectacular landscape of the valley.
The outstretching hill above the river on which the
inhabited area of San Salvatore rises , announces the
Bobbio plain .
The Trebbia valley is included in
a long arc-shaped embrace of mountains which, from the
watershed line of the Torriglia Commune, directs the
river course from its spring to Bobbio, becoming hill
and spreading
itself slowly into the plain. |
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