Simple download service (Atom) of the dataset: Mapping of the haea removal of clays in the commune of Castillon-Savès (Gers)

The mapping of the hay removal of clays in the commune of Castillon-Savès 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.该数据集所涵盖的热尔省（Gers）卡斯蒂永-萨韦塞（Castillon-Savès）市镇境内粘土胀缩现象的制图成果，提取自法国地质与矿产研究局（BRGM）编制的省级制图数据集。该制图为粘土胀缩现象发生概率的分区图。法国地质与矿产研究局（BRGM）首先基于纯物理判据，依托该省地质图编制了粘土胀缩易发性分区图，编制过程中针对各地质单元，综合考量了以下因素： — 地质单元内粘土物质的占比（岩相分析）； — 粘土相内膨胀性矿物的占比（矿物组成）； — 该物质的岩土工程特性。 针对已识别的各粘土地质单元，最终危害等级由上述易发性等级结合灾害性胀缩事件的发生密度确定，该密度以每100平方公里实际出露的城市化地表为统计基准。