Guiers

The Guiers is a French river which is born in the préalpes from Savoy, an affluent of left bank of the the Rhone, a 50 km length, divided into Chartreuse between Guiers Vif and Guiers Mort.

Geography

Guiers takes its source in the Massif of Chartreuse in Savoy, in the east of the locality of Saint-Pierre-with-Chartreuse.

In its middle price and lower, it materializes the limit between the departments of the Savoy and the Isere, old border France - States of Savoy.

Hydrology

The interannual medium flow of Guiers was observed and calculated for one 19 years period to Romagnieu locality located at 5 kilometers of the confluence and near to Saint-Genix-on-Guiers. It is assembled to 16 m ³ a second for a surface of basin of 575 km ², that is to say almost the totality of its catchment area. The river presents seasonal fluctuations of flow typical of a rain mode to light nival component, with one long period of high waters (November at the beginning of June). The high waters present a double top. The first top of 17,5 m ³ in December is followed of a fall to 15 m ³ in January. Then the flows increase until the second and more important going top of 20,7 to 22,5 m ³ in March - April-May (with an in April maximum). A fast fall of the flows occurs then, finishing in one period of low water level in July - September, with fall of the monthly medium flow until the low water level on the level of 9,3 m ³ in August, which remains rather comfortable, compared to the low water levels of the very large majority of the rivers French.

With the low water levels, the VCN3 can fall until 2,46 m ³, in the event of dry period decennial, which is far from being severe. The VCN3 is the past minimal quantity or minimal flow over three days consecutive.

As for the risings, they can be rather important like everywhere in this zone, though largely lower than what prevails more in the south in the catchment area of the the Rhone. The QIX 2 or calculated flow of biennial rising, and the QIX 5 or calculated flow of quinquennial rising, is worth respectively 121 and 146 m ³ a second. The QIX 10 or calculated flow of decennial rising as well as the QIX 20 and the QIX 50 is not available (see note).

The measured maximum flow with Romagnieu is of 123 m ³ a second.

On the whole, Guiers is an extremely abundant river, well supplied with such abundant precipitations they, in the areas of the préalpes of Savoy. The Lame of water past in the catchment area of the river is of 882 millimetres annually, which is high, but completely normal in the Savoyard departments. The specific Débit (or Qsp) is assembled thus at 27,8 liters a second and per square kilometer of basin.

Tourism

Saint-Pierre-with-Chartreuse, to see absolutely, with its important civil architecture and religious, of which the Monastery of the Large Charteuse.
the Pont-de-Beauvoisin (Savoy), church of the Carmelite friars, source Felix Saint, bridge François Ier, city of the piece of furniture
the pretty small town of Saint-Genix-on-Guiers, with its old houses of.
the Throats of Sharp Guiers and the Throats of Dead Guiers.
the old Roman city of Aoste (Latin : Augustum ), its Romance church Saint-Didier, its Gallo-Roman museum.

References

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