Impero (river)

{{Infobox river

| name = Impero

| image = Oneglia-torrente_Impero2.jpg

| image_caption = The Impero in Oneglia

| length = {{convert|22.4|km|mi|abbr=on}}{{Cite book | title = Bacino dell'Impero | publisher = Provincia di Imperia | url = http://www.provincia.imperia.it/Portals/_provincia/Documents/BACINO%20DELL%27IMPERO.pdf | access-date = 2017-06-13 | archive-date = 2015-03-30 | archive-url = https://web.archive.org/web/20150330084732/http://provincia.imperia.it/Portals/_provincia/Documents/BACINO%20DELL%27IMPERO.pdf | url-status = dead }}

| source1_elevation =

| mouth_elevation = {{convert|0|m|abbr=on}}

| discharge1_avg =

| basin_size = {{convert|95|km2|mi2|abbr=on}}{{Cite book | title = Piano di bacino stralcio sul bilancio idrico del torrente Arroscia - Quadro generale di riferimento | publisher = Provincia di Imperia | url = http://pianidibacino.provincia.imperia.it/Portals/_pianidibacino/Documents/82fab69d-4b4b-4de2-a5f0-b711991e1d95.pdf | access-date = 2017-06-14 | url-status = dead| archive-url = https://web.archive.org/web/20151118143420/http://pianidibacino.provincia.imperia.it/Portals/_pianidibacino/Documents/82fab69d-4b4b-4de2-a5f0-b711991e1d95.pdf | archive-date = 2015-11-18 }}

| source1_location = Monte Grande (Ligurian Alps)

| mouth = Ligurian Sea

| mouth_location = Oneglia (IM)

| mouth_coordinates = {{coord|43|53|09|N|8|02|14|E|name=Mediterranean Sea-Impero|display=inline,title}}

| subdivision_type1 = Country

| subdivision_name1 = Italy

| map = Impero_location_map.png

}}

The Impero is a {{convert|22.4|km|mi|adj=on}} stream of Liguria (Italy).

Geography

The Impero rises near Monte Grande,{{cite web|url=https://geographic.org/geographic_names/name.php?uni=-182829&fid=3117&c=italy|title=Monte Grande, Italy - Geographical Names, map, geographic coordinates|website=Geographic.org|access-date=30 September 2017}} crosses the comunes of Aurigo, Borgomaro, Lucinasco, Chiusavecchia, Chiusanico and Pontedassio, giving its name to its valley, and ends in the Ligurian Sea in Oneglia (IM).

Impero basin (95 km2) is totally included in the Province of Imperia and also encompasses the communes of Cesio and Caravonica.{{cite web|url=http://www.pcn.minambiente.it/viewer/|title=Geoportale Nazionale : Map|website=Pcn.minambiente.it|access-date=30 September 2017}}

Main tributaries

= Upper valley =

File:Ponte_sull%27Impero_a_Borgomaro.png

Upstream of the village of San Lazzaro Reale (Borgomaro) the Impero (sometimes referred as Maro in this stretch) receives the following tributaries:

right hand:
rio Butasso,
rio Noceto,
rio Ponte,
rio Ciappa,
rio Rovera,
rio Pian Cappello
rio Fonti del Maro;
left hand:
rio Calanche,
rio Lavandè,
rio Lacori.
rio Cardei.

=== Rio Trexenda ===

File:Trexenda a San Lazzaro.png

The Tresenda (or Trexenda) is the main tributary of the Impero; it rises with the name of rio Caravonica from monte Mucchio di Pietre and gets from its right bank Rio Bramoso and Rio Acquafredda. Its drainage basin is of 13.3 square kilometres.{{cite book | title = Piano di Bacino - Impero | url = http://www.pianidibacino.ambienteinliguria.it/IM/impero/documenti/capitolo2-parte2.pdf | pages = 102 | website = Pianidibacino.ambienteinliguria.it | access-date = 2017-05-10 }}{{Dead link|date=January 2020 |bot=InternetArchiveBot |fix-attempted=yes }}

= Lower valley =

Downstream San Lazzaro Reale, where it gets Tresenda waters, the Impero receives the following streams:some of them are totally dry several months a year

right hand:
rio Maddalena,
rio Olivastri,
rio Baghi,
rio Delle Ville,
rio Ramà;
left hand:
rio Lavandero,
rio Candelero,
rio Viesci,
rio Rocca.
rio Sgoreto.

Fishing

File:Borgomaro-cascate maro.jpg]]

The Impero is not considered very interesting for fishing; upstream of Borgomaro trout coexist with cyprinids, while downstream the latter totally outnumber other fishes.