Ty Blei

Demography


There are, at the last census, precisely 4,616,602 inhabitants in Brittany 1). The least populated department is the Côtes d'Armor with 599 477 costarmoricains (13%). Then come Morbihan with 741 905 morbihains (16%). Then the Penn ar Bed with 904 999 Finistaires (19.6%). The most populated areas are in the east of Brittany: Ille et Vilaine with 1,026,962 inhabitants (22.2%) and the Loire Atlantique with 1,343,259 inhabitants (29.2%).

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2018/11/13 11:33 · Myrddin Wyllt

Climate and weather

Surrounded by two seas, the Channel and the Atlantic, the Armorican peninsula enjoys a true oceanic climate, characterised by summers rather beautiful and mild and winters often rainy, windy and mild. Overall, Breton weather is often variable, changing, without excess temperatures, and very variable from one sector to another.

  • On the north coast, the prevailing winds come from the north-west on the coast of Finistère, with sheltered areas such as the island of Bréhat, where the Gulf Stream passes by, a hot current favourable to the creation of microclimates.
  • On the south coast, the climate is generally sunnier, warmer, drier than on the north coast.

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2018/11/12 13:06 · Myrddin Wyllt

Soils

Brittany soils, like all soils, are formed thanks to pedogenesis, that is to say a set of physical, chemical and biological processes, which led to different types of soils in Brittany. These soils in Brittany have notably evolved during the Quaternary period and during the recent period, and play a role as an interface in the environment.

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2018/11/12 09:13 · Myrddin Wyllt

Soil degradation

The soil cover of Brittany is subjected to a natural impoverishment linked to the leaching character of its climate and the poverty in bases of its geological substratum, in particular granitic. The silty soils on shale are poor in organic matter; they show significant sensitivity to settlement and erosion. The degradation is manifested on the one hand by a certain acidification of the soil and by the decrease of its organic stock and on the other hand, it manifests itself by accumulations in the soil:

  • Phosphorus from fertilizers.
  • Mercury can be emitted during the combustion of contaminated waste or fossil fuels and thereby contaminate the soil and the environment as a result of atmospheric deposition. Application of manure (50%), sludge and compost (17%) and atmospheric deposition (21%) account for almost all mercury inputs to soils.
  • Copper and zinc used in mineral supplementation of pigs, most of which is found in its effluent that is spread on the soil because the animal retains only a small part.
  • Heavy metals, cadmium and lead, from the spreading of sewage sludge.
  • Pesticides brought in by phytosanitary products and their metabolites. The risk of environmental pollution by pesticides leaching off the soil into water bodies is affected by the sorption force of the compound on the soil. (Sorption is the process by which one substance attaches to another and includes both adsorption and absorption).

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2018/11/11 20:56 · Myrddin Wyllt

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