Putna River (Siret)
| Putna River | |
| River | |
| Countries | Romania |
|---|---|
| Counties | Vrancea County |
| Tributaries | |
| - right | Zăbala, Milcov, Râmna |
| Source | Lăcăuți-Arișoaia Ridge |
| - location | Vrancea Mountains |
| Mouth | Siret |
| - location | Vulturu |
| - coordinates | 45°36′24″N 27°29′49″E / 45.60667°N 27.49694°ECoordinates: 45°36′24″N 27°29′49″E / 45.60667°N 27.49694°E |
| Length | 153 km (95 mi) |
| Basin | 2,480 km2 (958 sq mi) |
| Progression | Siret→ Danube→ Black Sea |
Putna River is a right tributary of the river Siret in Vrancea County in Romania, in the historical region of Moldavia. It discharges into the Siret near Vulturu.
Hydrogeological studies reveal the presence of wide and relatively rich aquifers in all the structural zones of the river. The phreatic waters participate in proportion of 30% in supplying with water the surface water resources. Although rainfalls are the main element of water supply for the rivers, in the Vrancea Mountains area the groundwater supply has a great importance.
In certain conditions, the groundwaters contain salts, having a concentration of 0,5 g/l.
The river contains many minerals, especially sulphur, carbonates and iron compounds. Such mineral sources can be found at the foot of the slopes around the Putna Waterfall, at the foot of the northern slopes of Porcului Ridge (confluence of the Tişiţa and Putna rivers), on the valley of the Mișina River, at the river mouth of the Pietricica River.
The river basin of the Putna River has a total surface of 2,480 km2 (960 sq mi); 31% of this surface is located in the mountain area, draining the eastern flank of the Vrancea Mountains. The mountainous basin of the Putna River is formed of two orohydrographic nodes. The most important is in the central sector of the western ridge of Vrancea Mountains, and is represented by the Lăcăuți-Arișoaia Ridge, out of which the Putna and the Zăbala rivers are spread radially. The second is individualized on the median ridge and is given by the northern extremity of Paisele Ridge, where the Năruja River and the little rivers belonging to the upper basins of the Putna, Tișița and Năruja rivers originate.
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