Guadiana Menor
River in Spain
From Wikipedia, the free encyclopedia
The Guadiana Menor River is a river in southern Spain, one of the main tributaries of the Guadalquivir River, on its left bank. It has a total length of 182 km[1] (including the length of its upper stretches known as the Baza River and Gallego River), and it drains a large basin of 7,251 km². Administratively, it flows through the provinces of Granada and Jaén in the autonomous community of Andalusia.[2]
| Guadiana Menor River | |
|---|---|
View of the river at the Negratín Reservoir | |
 Location of the Guadiana Menor | |
| Location | |
| Country |  Spain |
| Region |  Andalusia |
| Physical characteristics | |
| Source | Sierra de Baza |
| • location | Guadalquivir |
| • elevation | 630 m |
| 2nd source | |
| • location |  Granada  Jaén |
| Mouth | Guadalquivir River, on the left bank |
• coordinates | 37°56′07″N 3°15′27″W |
| Length | 182 km |
Basin size | 7251 km² |
| Discharge | |
| • location | 15.76 m³/s |
| Basin features | |
| Tributaries | |
| • left | Guadahortuna River |
In 1977, the Guadalquivir Hydrographic Confederation published a book titled Guadalquivires, which endorsed the thesis that the true source of the Guadalquivir is the Guadiana Menor–Barbata, considered as a single river.[3]
Etymology
The name has an origin independent of the Guadiana River, as it derives from its original Hispanic name (Anas) with the prefix Wadi, meaning valley in Arabic.[4][5][6]
Geography
The designation Guadiana Menor is usually applied to the stretch downstream of the confluence of the Fardes River with the Barbata[7] or Guardal. Its main tributaries are the Fardes and Guadahortuna on the left bank,[8] and the Ceal and Toya on the right bank, in addition to those that flow into the Barbata upstream: the Castril, the Cúllar, and the Guadalentín, which should not be confused with the tributary of the Segura River.
The Negratín Reservoir (Province of Granada) is located on the Barbata–Guardal River.[8] In some cases, the name "Guadiana Menor" has also been applied to the stretch of water between this reservoir and the confluence with the Fardes River. Historically, this stretch was called "the Great River" due to the significant increase in flow that occurred when the Castril and Guadalentín rivers, which are more voluminous than the main river, joined the Guardal–Barbata.[9]
No source attributes the designation Guadiana Menor to the entire course of the Barbata–Guardal, although technically they are one and the same river.
Hydrographic Basin
Its basin includes the depressions of Baza and Guadix,[2] a former inland sea in the Pliocene that opened its waters to the Guadalquivir through the Cerrada del Negratín, forming the current Guadiana.[10]
In this former endorheic basin, sheltered from rainfall, precipitation is very scarce, which, combined with the nature of its soil, mostly composed of gypsum, causes the rivers that converge toward the Guadiana to have an intermittent and irregular character. The extensive basin encompasses territories in the provinces of Granada, Jaén, Albacete, Murcia, and Almería.[2] The Cañada del Salar, in the hamlet of Topares, Almería, is the point in the Guadalquivir basin where water must travel the greatest distance to reach its mouth.[10]
The basin of the Guadiana Menor is the second largest among the tributaries of the Guadalquivir, with a surface area of 7,251 km². The largest is that of the Genil River.[11]
The following table attempts to identify the primary and secondary tributaries of greatest length.[12]
| River | Source | Mouth | Length (km) | |
|---|---|---|---|---|
| Guardal River | Sierra Seca | Right bank | 50.7 | |
| - | Raigadas River | Sierra de la Sagra | Guardal River | 16.3 |
| - | Galera River | Sierra de María | Guardal River | 25.4 |
| - | Huéscar Rivera | Sierra de la Sagra | Galera River | 34.2 |
| - | Cúllar River | Sierra de Orce | Guardal River | 35.5 |
| - | Baza River | Sierra de Baza | Guardal River | 48.8 |
| - | Castril River | Sierra de Castril | Guardal River | 48.1 |
| Guadalentín River | Sierra de Cazorla | Right bank | 47.6 | |
| Baúl Stream | n/a | Left bank | 26.8 | |
| Fardes River | Sierra de Huétor | Left bank | 72 | |
| - | Morollón River | Sierra de la Peza | Fardes River | 11 |
| - | Alhama River | Sierra Nevada | Fardes River | 21.6 |
| - | Guadix Riverb | Sierra Nevada | Fardes River | 35.7 |
| - | Gor River | Sierra de Gor | Fardes River | 30.3 |
| Guadahortuna River | Montes Orientales | Left bank | 59.1 | |
| Ceal River | Sierra de Cazorla | Right bank | 14.9 | |
| Toya Riverc | Sierra de Cazorla | Right bank | 25.7 | |
| Guadiana Menor River | Sierra de Bazad | Guadalquivir River | 182 | |
- Notes
a Also called the Barbata River.
b Also called the Verde River.
c Also called the Extremera River.