Adaja
{{Short description|River in Spain}}
{{Infobox river|name=Adaja|image=Río Adaja a su paso por Ávila (27507888386).jpg|image_alt=|image_caption=The Adaja near Ávila|source1_location=Fuente Berroqueña|mouth_location=Douro|progression={{RDouro}}|subdivision_type1=Country|subdivision_name1=Spain|etymology=|length_km=163
|source1_elevation=|source1_coordinates={{coord|40|32|22.57|N|5|09|10.09|W|display=inline}}|mouth_elevation=|mouth_coordinates={{coord|41|31|59.53|N|4|51|47.81|W|display=inline}}|basin_size_km2=5,328
|river_system=|tributaries_left=|tributaries_right=Eresma|discharge1_location=|discharge1_min=|discharge1_avg=|discharge1_max=}}
The Adaja is a river of Spain located in the centre of the Iberian Peninsula, a major left-bank tributary of the Douro.{{Cite web|url=http://aguas.igme.es/igme/publica/libro44/pdf/lib44/2_1.pdf|title=Sistemas acuíferos de la cuenca del Duero|page=35}} Featuring a total length of 163 km, its river basin drains an area of 5,328 km2.{{Cite journal|date=27 October 2008|title=Características de los terrenos|url=https://www.diputacionavila.es/bops/2008/27-10-2008.pdf|journal=Boletín Oficial de la Provincia de Ávila|issue=208|pages=17}}
It has its source in the so-called Fuente Berroqueña (Villatoro, province of Ávila), near the saddle point between {{ill|La Serrota|es}} and the Sierra de Ávila. Initially following a Southwest-Northeast course through the Amblés Valley, the Adaja bends towards the North in Ávila. It receives the contribution of its most important tributary, the Eresma, near Matapozuelos,{{Cite web|url=https://www.noticiascyl.com/valladolid/provincia-valladolid/2018/12/08/matapozuelos-y-su-ermita-una-tradicion-inmemorial/|title=Matapozuelos y su ermita: una tradición inmemorial {{!}} Noticiascyl|last=Salvador|first=Alvar|date=2018-12-08|language=es|access-date=2020-01-16}} emptying in the Douro in the province of Valladolid near the town of Aniago.{{Cite web|url=https://puebloenpueblo.com/2015/03/04/riberas-del-adaja/|title=Riberas del Adaja|last=Redacción|date=2015-03-04|website=Valladolid, de pueblo en pueblo|language=es-ES|access-date=2020-01-16}}
