Simple download service (Atom) of the dataset: Mapping of the hay removal of clays in the commune of Gaujac (Gers)

The mapping of the hay removal of clays in the municipality of Gaujac in the department of Gers 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.

法国热尔省戈雅克（Gaujac）市镇内黏土表层干草移除相关制图，源自法国地质矿业研究局（BRGM）的省级制图数据集。
该制图为黏土胀缩现象发生概率的分区图件。
法国地质矿业研究局（BRGM）最初基于纯物理标准，依托该省地质图编制了易发性图件，编制过程中针对各地质地层综合考量了以下因素：
— 地层内黏土物质的占比（岩性分析）；
— 黏土相中膨胀矿物的占比（矿物组成）；
— 该物质的岩土工程特性。
针对已识别的各黏土地层，最终的灾害等级由前述得到的易发性等级结合有害胀缩密度计算得出，该密度按每100平方公里实际出露的城市化地表进行统计。