GeoScour v2 - A geological assessment of the potential for river scour

BGS GeoScour v2 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 v2 includes 18 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 dataset 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 product has broad applications through its adaptation to suit multiple types of asset susceptible to fluvial erosion. GeoScour looks specifically at the geological factors that influence scour and does not consider any hydraulic or hydrodynamic factors. The GeoScour Dataset Product is designed to be used by multiple stakeholders with differing needs and therefore, can be interrogated at a number of levels. Tier 1 A catchment stability dataset 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 using Tier 2 datasets 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, geomorphology types, and additional summary statistics for worst, average, and best-case scenarios for underlying surface geology scour susceptibility, as well as additional summary statistics of key environmental parameters such as protected sites and urban coverage. Tier 3 datasets 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 those assessing the propensity for river scour for any given reach of a river across Great Britain and can be used as an input into hydraulic/hydrodynamic models. Tier 1 and 2 datasets are Open Government Licence (OGL), Tier 3 is licenced.

BGS GeoScour v2 数据集提供了针对大不列颠地区河流侵蚀敏感性信息，采用三级数据提供机制，允许在不同分辨率下，从流域到局部（河道/河段）尺度，逐步提高理解水平。GeoScour v2 包含18个地理信息系统（GIS）图层，提供了关于流域和河流环境自然特征和属性的详细信息，以评估大不列颠地区的河流侵蚀。该数据集产品填补了当前侵蚀建模中的空白，通过地质属性的输入提供了改进的工具集，以便更轻松地评估和提高侵蚀风险的地位，现在和未来，以帮助基础设施提供者和资助者优先分配资源，识别预防性修复工作，以避免昂贵的和破坏性的失效。该产品通过适应多种易受河流侵蚀的资产类型，具有广泛的应用。GeoScour特别关注影响侵蚀的地质因素，不考虑任何水力或水动力学因素。GeoScour 数据集产品旨在满足不同需求的多方利益相关者的使用，因此可以在多个层面进行查询。一级数据集提供了流域稳定性的数据集，概述了流域特征、典型响应类型和演变情况。它可以用作高级概述，纳入流域管理计划、国家审查和流域比较，二级数据集适用于较小的流域区域，侧重于提供更详细流域管理、自然洪水管理等相关用途的数据。它分析了如洪水容纳空间、流域径流潜力、地貌类型等地质属性，以及关于基础地表地质侵蚀敏感性、保护地点和城市覆盖率等关键环境参数的最坏、平均和最佳情况情景的附加汇总统计。三级数据集提供了详细的河流信息，旨在纳入更复杂的河流侵蚀模型。它为河流侵蚀发展和过程提供了基线地质背景，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地区任何河段河流侵蚀倾向具有用途，并可作为水力/水动力学模型的输入。一级和二级数据集采用开放政府许可（OGL），三级数据集需获得许可。