Coastal Design - Extreme Sea Levels

This GIS dataset and supporting information providing design / extreme sea level and typical surge information around the coastline of Wales under present day conditions. This is a specialist dataset which informs on work commenced around the coast ranging from coastal flood modelling, scheme design, strategic planning and flood risk assessments. The dataset contains the following layer components:
- Extreme Sea Level Values: Extreme sea levels for a range of return periods
- Extreme Sea Level Confidence Level: Confidence intervals providing allowances for uncertainty
- Estuary Boundaries: Inland estuarine boundaries of the extreme sea levels
- Surge Shape Locations: Reference to surge shape appropriate for each Class A gauge site and where to apply it
- Tide Gauge Locations: Location of gauging stations

本地理信息系统（GIS）数据集及其附带信息，提供了在当前条件下围绕威尔士海岸线的设计/极端海平面及典型涌潮信息。该数据集为一项专业数据集，旨在为沿海地区的工作提供信息，涉及沿海洪水模型、方案设计、战略规划和洪水风险评估等多个方面。数据集包含以下图层组件：
- 极端海平面值：一系列回期内的极端海平面值
- 极端海平面置信水平：提供不确定性补偿的置信区间
- 河口边界：极端海平面值的内陆河口边界
- 涌潮形状位置：适用于每个A级测站合适的涌潮形状及其应用位置
- 潮位测站位置：测站位置