BGS Permeability version 8

The BGS Permeability data product shows estimated rates of water movement from the ground surface to the water table. BGS Permeability version 8 incorporates the latest geology mapping (BGS Geology 50k). This includes updates to the lithology-coding schema, the LEX_RCS. A 2-part code used to identify the named rock unit from the BGS lexicon of named rock units (LEX) followed by a Rock Classification Scheme (RCS) code which describes the rocks lithological characteristics e.g. texture and composition. Updates to these codes and latest dissolution hazard data sourced from BGS GeoSure: Soluble Rocks have been reviewed and classified as part of the version 8 release. The product covers Great Britain and is presented at a scale of 1:50 000, based on the geological data at the same scale. However, in areas where the geology is not mapped to this scale, the next best available scale is used. The BGS Permeability data product can be used to compare the relative permeability of deposits at the regional scale, indicating where highly permeable rocks could allow rapid infiltration to occur, or where less permeable rocks are present and water could pond on the ground surface. The dataset can be used as a component in a wide range of geo-environmental assessments such as natural flood management, Sustainable Drainage Systems, engineering desk studies, slope stability, and aquifer vulnerability. It is for use at the regional scale and is not recommended for use at the site-specific scale.

BGS渗透率数据产品展示了地下水从地表向地下水位流动的估算速率。BGS渗透率版本8集成了最新的地质测绘（BGS地质50k）。这包括对岩性编码模式（LEX_RCS）的更新。LEX_RCS是一种两段式代码，用于从BGS命名的岩石单位词汇表（LEX）中识别命名的岩石单位，随后是岩石分类方案（RCS）代码，该代码描述了岩石的岩性特征，例如质地和成分。这些代码的更新以及最新源自BGS GeoSure的溶解危害数据已在此版本8的发布中审查和分类。该产品覆盖大不列颠，并以1:50 000的比例呈现，基于同一比例的地质数据。然而，在地质未测绘到该比例的地区，将使用下一个最佳可用的比例。BGS渗透率数据产品可用于比较区域尺度上的沉积物相对渗透率，指示高渗透性岩石可能允许快速渗透发生的位置，或低渗透性岩石存在且水可能在地面积聚的位置。该数据集可作为广泛地理环境评估的组成部分，例如自然洪水管理、可持续排水系统、工程设计桌面研究、边坡稳定性和含水层脆弱性。它适用于区域尺度，不建议用于特定地点的尺度。