Editing Iberian Peninsula (section)

===Rivers===
[[File:Douro estuary.jpg|thumb|Discharge of the [[Douro]] into the Atlantic Ocean near Porto]]
{{Main|List of rivers of Spain|List of rivers of Portugal}}

The major rivers flow through the wide valleys between the mountain systems. These are the [[Ebro]], [[Douro]], [[Tagus]], [[Guadiana]] and [[Guadalquivir]].<ref>{{cite news |url=https://listas.20minutos.es/lista/los-10-rios-mas-largos-de-espana-362085/ |title=Los 10 ríos mas largos de España |date=30 May 2013 |access-date=1 September 2018 |newspaper=[[20 Minutos]] |language=es}}</ref><ref>{{cite web |url=http://agrega.juntadeandalucia.es/repositorio/07072011/3c/es-an_2011070713_9100548/ODE-e318b0ac-67b1-3aa6-a5a1-26cdd2886095/2_el_territorio_y_la_hidrografa_espaola_ros_cuencas_y_vertientes.html |title=2. El territorio y la hidrografía española: ríos, cuencas y vertientes |access-date=1 September 2018 |work=[[Junta de Andalucía]] |archive-date=9 April 2022 |archive-url=https://web.archive.org/web/20220409133130/http://agrega.juntadeandalucia.es/repositorio/07072011/3c/es-an_2011070713_9100548/ODE-e318b0ac-67b1-3aa6-a5a1-26cdd2886095/2_el_territorio_y_la_hidrografa_espaola_ros_cuencas_y_vertientes.html |url-status=dead }}</ref> All rivers in the Iberian Peninsula are subject to seasonal variations in flow.

The Tagus is the longest river on the peninsula and, like the Douro, flows westwards with its lower course in Portugal. The Guadiana river bends southwards and forms the border between Spain and Portugal in the last stretch of its course.