GeoScour - A Geological assessment of the potential for river scour

BGS GeoScour provides river scour susceptibility information for Great Britain using a three-tiered data provision allowing increasing levels of understanding at different resolutions from catchment to local (channel/reach) scales. GeoScour includes 11 GIS layers, providing information on the natural characteristics and properties of catchment and riverine environments for the assessment of river scour in Great Britain. The data product fills a gap in current scour modelling, with the input of geological properties. It provides an improved toolkit to more easily assess and raise the profile of scour risk, now and in the future, to help infrastructure providers and funders prioritise resources, identify remedial works to preclude costly and prevent disruptive failures. The data product has broad applications through its adaptation to suit multiple types of asset likely to be affected by fluvial erosion. The GeoScour Data Product is designed to be used by multiple stakeholders with differing needs and therefore, can be interrogated at a number of levels. Tier 1 data provides a summary overview of the catchment characteristics, typical response type, and evolution. It can be used as a high-level overview for incorporation into catchment management plans, national reviews and catchment comparisons. Tier 2 data are available as smaller catchment areas and focusses on providing data for more detailed catchment management, natural flood management and similar uses. It analyses geological properties such as flood accommodation space, catchment run-off potential, and geomorphology types, as well as additional summary statistics of key environmental parameters such as protected sites and urban coverage. Tier 3 data provide the detailed riverine information that is designed to be incorporated into more complex river scour models. It provides the baseline geological context for river scour development and processes and identifies important factors that should be considered in any scour model. Factors such as material mineralogy, strength and density are key properties that can influence a river’s ability to scour. In addition, an assessment of river fall, sinuosity and flood accommodation space is also provided. This data is of use to all users assessing the propensity for river scour for any given reach of a river across Great Britain. Tier 1 and 2 data are available with an OGL, Tier 3 data is licenced.

BGS GeoScour数据集针对大不列颠地区提供河流侵蚀敏感性信息，采用三层级数据提供模式，允许多尺度解析，从流域至局部（河道/河段）尺度不断深化理解。该数据集包含11个GIS图层，详尽地记录了流域和河流环境的自然特征与属性，以供评估英国境内的河流侵蚀。数据产品弥补了当前侵蚀建模的不足，并引入了地质属性作为输入。它为现在及未来更便捷地评估和提升侵蚀风险提供了更为完善的工具集，协助基础设施提供者和资金支持者优化资源配置，识别预防措施，以避免代价高昂和破坏性的故障。GeoScour数据产品适应性强，适用于多种可能受河流侵蚀影响的资产类型，具有广泛的应用前景。鉴于其旨在满足不同利益相关者的需求，因此可以多层次地进行查询。一级数据提供了流域特征、典型响应类型和演变的概览，可作为流域管理计划、国家审查和流域比较的高级概述。二级数据针对较小的流域区域，侧重于提供更详细的流域管理、自然洪水管理等方面的数据。它分析了诸如洪水容纳空间、流域径流潜力、地貌类型等地质属性，以及关键环境参数（如保护区和城市覆盖率）的附加汇总统计。三级数据提供详细的河流信息，旨在纳入更复杂的河流侵蚀模型中。它为河流侵蚀的发展和过程提供了基础地质背景，并确定了任何侵蚀模型中应考虑的重要因素。如材料矿物学、强度和密度等因素是影响河流侵蚀能力的关键属性。此外，还提供了河流落差、弯曲度和洪水容纳空间的评估。这些数据对评估大不列颠境内任何河段河流侵蚀倾向的用户均有参考价值。一级和二级数据以开放政府许可证（OGL）提供，三级数据需获得授权。