Gulf of Cádiz in the context of "Guadiana River"

The Guadalquivir (/ˌɡwɑːdəlkɪˈvɪər/, also UK: /-kwɪˈ-/, US: /-kiːˈ-, ˌɡwɑːdəlˈkwɪvər/, Spanish: [ɡwaðalkiˈβiɾ]) is the fifth-longest river in the Iberian Peninsula and the second-longest river with its entire length in Spain. The Guadalquivir is the only major navigable river in Spain. Currently it is navigable from Seville to the Gulf of Cádiz, but in Roman times it was navigable from Córdoba.

The Guadiana River (/ˌɡwɑːdiˈɑːnə/ GWAH-dee-AH-nə, US also /ɡwɑːdˈjɑːnə/ gwahd-YAH-nə, Spanish: [ɡwaˈðjana], Portuguese: [ɡwɐdiˈɐnɐ]) is an international river defining a long stretch of the Portugal-Spain border, separating Extremadura and Andalusia (Spain) from Alentejo and Algarve (Portugal). The river's basin extends from la Mancha and the eastern portion of Extremadura to the southern provinces of the Algarve; the river and its tributaries flow from east to west, then south through Portugal to the border towns of Vila Real de Santo António (Portugal) and Ayamonte (Spain), where it flows into the Gulf of Cádiz. With a course that covers a distance of 829 kilometres (515 mi), it is the fourth-longest in the Iberian Peninsula, and its hydrological basin extends over an area of approximately 68,000 square kilometres (26,000 sq mi) (the majority of which lies within Spain).

Huelva (US: /ˈhwɛlvə/ WHEL-və, Spanish: [ˈwelβa] , locally [ˈɡweɾβa]) is a municipality of Spain and the capital of the province of Huelva, in the autonomous community of Andalusia. Located in the southwest of the Iberian Peninsula, it sits between the estuaries of the Odiel and Tinto rivers on the Atlantic coast of the Gulf of Cádiz. According to the 2010 census, the city had a population of 149,410.

While the existence of an earlier pre-Phoenician settlement within the current urban limits since c. 1250 BC has been tentatively defended by scholars, Phoenicians established a stable colony roughly by the 9th century BC. Modern economic activity conformed to copper and pyrite extraction upstream funded by British capital and to the role of its port, as well as with the later development of a petrochemical industry.