| Guadyerbas | |
|---|---|
 | |
| Location | |
| Country | Spain |
| Physical characteristics | |
| Source | Sierra de San Vicente |
| • location | Navamorcuende |
| • coordinates | 40°8′52″N 4°44′37″W / 40.14778°N 4.74361°W |
| • elevation | ~1,200 m (3,900 ft) |
| Mouth | Tiétar |
• location | Oropesa |
• coordinates | 40°5′1″N 5°11′31″W / 40.08361°N 5.19194°W |
| Length | 45 km (28 mi) |
| Basin features | |
| River system | Tagus |
| Tagus Basin | |
The Guadyerbas is a river of Spain located in the centre of the Iberian Peninsula. It is the main left-bank tributary of the Tiétar,[1] in turn a major tributary of the Tagus.
It has its source in the western reaches of the Sierra de San Vicente,[2] at the feet of the Pico Cruces, at roughly 1,200 m above sea level.[3] Featuring a total length of 45 km,[4] it flows westwards through the northwest of the province of Toledo, emptying in the Tiétar a few kilometres upstream from the Rosarito Reservoir,[5] in Oropesa.
Its waters are retained by the Navalcán Reservoir.[1] The toponym is formed by the Arabic wadi (river) and the Spanish hierba/yerba (grass).[6]
