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Putna River (Siret)
Putna River is a tributary of the Siret River in Vrancea County in Romania, in the historical region of Moldavia.
==Hydrogeological features of the river basin.==
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.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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