The Guadyerbas is a river of Spain located in the centre of the

Iberian Peninsula The Iberian Peninsula ( ), also known as Iberia, is a peninsula in south-western Europe. Mostly separated from the rest of the European landmass by the Pyrenees, it includes the territories of peninsular Spain and Continental Portugal, comprisin ...

. It is the main left-bank tributary of the Tiétar, in turn a major tributary of the

Tagus The Tagus ( ; ; ) is the longest river in the Iberian Peninsula. The river rises in the Montes Universales between Cuenca and Teruel, in mid-eastern Spain, flows , generally westward, and empties into the Atlantic Ocean in Lisbon. Name T ...

. It has its source in the western reaches of the , at the feet of the Pico Cruces, at roughly 1,200 m above sea level. Featuring a total length of 45 km, it flows westwards through the northwest of the

province of Toledo Toledo () is a Province (Spain), province of central Spain, in the western part of the Autonomous communities of Spain, autonomous community of Castile–La Mancha. It is bordered by the provinces of Madrid Province, Madrid, Cuenca Province (Spai ...

, emptying in the Tiétar a few kilometres upstream from the , in Oropesa. Its waters are retained by the Navalcán Reservoir. The toponym is formed by the Arabic ''

wadi Wadi ( ; ) is a river valley or a wet (ephemerality, ephemeral) Stream bed, riverbed that contains water only when heavy rain occurs. Wadis are located on gently sloping, nearly flat parts of deserts; commonly they begin on the distal portion ...

'' (river) and the Spanish ''hierba/yerba'' (grass).

References

{{authority control Tagus basin Rivers of Castilla–La Mancha