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Saint-Brieuc

 

Saint-Brieuc is a French commune located in Brittany, in the west of France. Prefecture of Côtes-d'Armor, it is also the most populous city with a population of almost 45,000 inhabitants (2016) called Briochins and Briochines. With 171,721 inhabitants (2013), the Briochine urban area is the most populous in the department. The city gives its name to the bay of Saint-Brieuc.

 

Geography

Saint-Brieuc was studied by the geographer Iwan Le Clec'h as part of his doctoral thesis on the modification of the commercial apparatus under the influence of peri-urbanization. This thesis was the subject of a review article in the journal Géoconfluences. The author shows the recomposition of the commercial offer under the effect of the automobile mobility of the inhabitants of the urban area of ​​Saint-Brieuc.

 

Location

The town is located on the edge of the Channel, at the bottom of a bay to which it gives its name (bay of Saint-Brieuc). 144 kilometers from Brest and 99 from Rennes, the town is crossed by the national road 12, at kilometer 416. Saint-Brieuc is crossed by two valleys where the Gouët and Gouédic rivers flow. The relief of the city (maximum altitude of 134 m at the Berrien reservoir), with its two steep-sided valleys, led to the construction of several bridges, in particular the two viaducts of the national 12 inaugurated in 1980. Saint-Brieuc is served by train (TER and TGV) on the line from Paris to Brest. The city is on average 2 h 10 min by train from the French capital.

 

Weather

Temperature and precipitation
The city of Saint-Brieuc is subject to a mild climate (average temperature of 11 ° C), oceanic type, characterized by an attenuation of extreme temperatures and great instability of weather types. The line of ridges which corresponds to the watershed line, not far from the coast, is also a climatic limit (pluviometric and thermal). The maritime influence reduces the daily and annual thermal amplitudes (the maximum average temperature is 14.4 ° C; its minimum is 7.6 ° C). Average minimum temperatures are reached in February (2.3 ° C) and average maximums in August (20.1 ° C). Frost days are rare and temperatures below −7 ° C are brief and exceptional (Plant hardiness Zone 9).

The bay of Saint-Brieuc is one of the least watered regions in Brittany with an average annual rainfall of 697 mm. The rains decrease from February to June to reach their minimum in July (28 mm). The months of December and January are the wettest months (83 and 76.3 mm), these averages hiding great variability. The rains are scarce and thunderstorms are rare, the snow is exceptional.