The Huerva River is a river in

Aragon Aragon ( , ; Spanish and an, Aragón ; ca, Aragó ) is an autonomous community in Spain, coextensive with the medieval Kingdom of Aragon. In northeastern Spain, the Aragonese autonomous community comprises three provinces (from north to sou ...

Spain , image_flag = Bandera de España.svg , image_coat = Escudo de España (mazonado).svg , national_motto = ''Plus ultra'' (Latin)(English: "Further Beyond") , national_anthem = (English: "Royal March") , i ...

. It is a

tributary A tributary, or affluent, is a stream or river that flows into a larger stream or main stem (or parent) river or a lake. A tributary does not flow directly into a sea or ocean. Tributaries and the main stem river drain the surrounding drainage ...

of the

Ebro , name_etymology = , image = Zaragoza shel.JPG , image_size = , image_caption = The Ebro River in Zaragoza , map = SpainEbroBasin.png , map_size = , map_caption = The Ebro ...

. Its mean annual discharge is only .

Course

This long river rises in the

Sierra de Cucalón Sierra de Cucalón is a long system of mountain ranges in Aragon, Spain, located between the comarcas of Jiloca and Cuencas Mineras. Geography These mountains are part of the Iberian System and are often covered with snow in the winter. Rivers Hu ...

, near Fonfría in the

Jiloca Comarca Jiloca Comarca is a Comarcas of Aragon, comarca in Aragon, Spain. It is located in Teruel Province, in the mountainous Sistema Ibérico, Iberian System area. Its capital is Calamocha and it was formerly known as ''Comarca de Calamocha''. The Jilo ...

. Flowing northwestwards near Lagueruela and

Villadoz Villadoz is a municipality located in the province of Zaragoza, Aragon, Spain. According to the 2020 census, the municipality has a population of 95 inhabitants. The town is located close to the Sierra del Peco mountain range. History Romans ar ...

, it increases its size near

Villarreal de Huerva Villarreal de Huerva is a municipality located in the province of Zaragoza, Aragon, Spain. According to the 2010 census,Instituto Nacional de Estadística (Spain) the municipality has a population of 202 inhabitants. This town is named after the ...

when it is joined by the ''Arroyo de Villalpando''. Then it flows northeastwards past

Mainar Mainar is a municipality located in the province of Zaragoza, Aragon, Spain. According to the 2004 census (INE), the municipality has a population of 162 inhabitants. This town is located near the Sierra de Algairén in the comarca of Campo de Dar ...

, Cerveruela,

Vistabella de Huerva Vistabella, also known as Vistabella de Huerva, is a municipality in the province of Zaragoza, Aragon. According to the 2010 censusInstituto Nacional de Estadística (Spain) the municipality has a population of 50 inhabitants. The town is named a ...

, Tosos (formerly Alcañiz de la Huerva),

Villanueva de Huerva Villanueva de Huerva is a municipality located in the province of Zaragoza, Aragon, Spain. According to the 2010 census,Instituto Nacional de Estadística (Spain) the municipality had a population of 562 inhabitants. This town is named after the ...

, Muel,

Cuarte de Huerva Cuarte de Huerva is a municipality located in the province of Zaragoza, Aragon, Spain. According to the 2013 census the municipality has a population of 11043 inhabitants. It is named after the Huerva River. See also * Zaragoza Comarca *List of ...

Cadrete Cadrete is a small town in north-east Spain, close to Zaragoza. It is notable for its Muslim castle, Mudejar Church and famous Cardoons. More recently, a massive wind-turbine has been installed at less than 300 metres away from the village, prod ...

and

María de Huerva María de Huerva is a municipality located in the province of Zaragoza, Aragon, Spain. According to the 2004 censusInstituto Nacional de Estadística (Spain) the municipality has a population of 2,125 inhabitants. María de Huerva is named after ...

until its waters reach the

Ebro , name_etymology = , image = Zaragoza shel.JPG , image_size = , image_caption = The Ebro River in Zaragoza , map = SpainEbroBasin.png , map_size = , map_caption = The Ebro ...

Zaragoza Zaragoza, also known in English as Saragossa,''Encyclopædia Britannica'"Zaragoza (conventional Saragossa)" is the capital city of the Zaragoza Province and of the autonomous community of Aragon, Spain. It lies by the Ebro river and its tributari ...

, where is called 'La Huerva'.

Ecology

The Huerva is relatively little polluted in its upper course, hence endangered species like the ''

Austropotamobius pallipes ''Austropotamobius pallipes'' is an endangered European freshwater crayfish, and the only crayfish native to the British Isles. Its common names include white-clawed crayfish and Atlantic stream crayfish. Distribution It is found from the eas ...

'' crayfish and fishes like ''

Barbus haasi ''Barbus haasi'', or the "Catalonian barbel" ( ca, barb cua-roig; es, barbo colirrojo or ''barbo de cola roja''), is a species of freshwater fish in the family Cyprinidae. It is a small size barbel found only in the northeast of the Iberian pe ...

'', ''

Rutilus arcasii ''Achondrostoma arcasii'', termed the bermejuela, is a species of freshwater fish in the family Cyprinidae. It is found in the Douro River in northern Portugal and in rivers draining to both the Atlantic Ocean and the Mediterranean, including th ...

'' and ''

Chondrostoma toxostoma The South-west European nase (''Parachondrostoma toxostoma'') is a species of cyprinid fish that is found in France and Spain. Its natural habitats are rivers and water storage areas. It is threatened by habitat loss Habitat destruction (a ...

'' are to be found in its waters.Río Huerva
/ref>

References

External links

El río Huerva, un oasis entre el Sistema Ibérico y el Valle del Ebro (PDF).

Río Huerva. Aguas arriba del embalse de las Torcas
Rivers of Spain Ebro basin Sistema Ibérico Rivers of Aragon {{Spain-river-stub