Simple download service (Atom) of the dataset: Map of the haea removal of clays in the commune of Puylausic (Gers)

The mapping of the hay removal of clays in the commune of Puylausic in the Gers department is extracted from the departmental mapping from the BRGM. This mapping is a zoning of the probability of occurrence of the phenomenon of shrink-inflating of clay soils. A susceptibility map was first drawn up on the basis of purely physical criteria by the BRGM from the geological maps of the department, which were interpreted taking into account the following factors for each geological formation:
— the proportion of clay material within the formation (lithic analysis);
— the proportion of blowing minerals in the clay phase (mineralogical composition);
— the geotechnical behavior of the material.
For each of the clay formations identified, the hazard level is ultimately the result of the level of susceptibility thus obtained with the density of sinister swelling, reported to 100 km² of actual urbanised outcropping surface.

热尔省皮伊洛西克市镇范围内黏土腐殖质移除分布图，取自法国地质矿产调查局（BRGM）编制的省级图件。该图件为黏土胀缩现象发生概率的分区图。法国地质矿产调查局（BRGM）最初依据纯物理准则，基于该省地质图件编制了胀缩敏感性图件，编图时针对各地质单元，综合考量了以下因素：
— 地质单元内黏土物质占比（岩相分析）；
— 黏土相中膨胀性矿物占比（矿物组成分析）；
— 岩土体的土工力学性状。
针对已识别的各黏土地质单元，最终的灾害等级由上述敏感性等级结合灾害性胀缩发生密度确定，该密度以每100平方千米实际出露的城市化地表面积为统计基准。