Simple download service (Atom) of the dataset: Map of the haea removal swelling of clays on the commune of Maurens (Gers)

The mapping of the hay removal of clays in the commune of Maurens in the department of Gers is extracted from the departmental mapping derived 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.

本数据集提取自法国地质矿业研究局（BRGM）编制的省域专题图件，该图件针对热尔省莫朗斯公社内的黏土，聚焦黏土胀缩灾害相关内容。该图件为黏土胀缩现象发生概率的分区图。法国地质矿业研究局（BRGM）最初基于纯物理准则，依托该省地质图件编制了易发性图件，编制过程中针对每个地质单元，综合考量了以下因素：
— 地层内黏土物质占比（岩相分析）；
— 黏土相中膨胀性矿物占比（矿物组成分析）；
— 岩土体的工程地质特性。
针对已识别的各黏土地层，最终的灾害等级由前述易发性等级结合灾害性胀缩密度（以每100km²实际出露的城市化地表面积为基准）综合确定。