Dataset Direct Download Service (WFS): Map of the alump removal of clays on the commune of Monbrun (Gers)

The mapping of the hay removal of clays in the commune of Monbrun 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.热尔省蒙布兰公社内黏土胀缩现象绘图成果，源自法国地质矿业研究局（BRGM）编制的省级地质图件。该图件为黏土胀缩现象发生概率的分区区划图。法国地质矿业研究局（BRGM）首先基于纯物理判据，依托该省地质图编制了易发性图件，在编图过程中，针对每一地质地层单元，综合考量了以下影响因素： — 地层内黏土物质占比（岩性分析）； — 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，最终的灾害等级由上述易发性等级结合灾害性胀缩密度计算得出，该密度以每100平方公里实际出露的城市化地表面积为统计基准。