Surface Water Flood Maps (FRM_FH_SURFACE_WATER_DEPTH_L)

The following probabilities are available for surface water flooding: - High - 10 year return period - Medium - 200 year return period - Low - 200 year return period plus climate change using the UKCP09 high emissions scenario for the 2080s.The surface water hazard maps show (where available): - Flood extent - Flood depth - Flood velocities where appropriate. The climate change scenario has been defined by United Kingdom Climate Projection 2009 (UKCP09) predictions for 2080 high emissions 95%ile predictions. Medium and low probability flood events were selected for consistency with return periods used in Scottish Planning Policy, whereas the high probability was chosen as it is reflective of observed events experienced over the last few decades.针对地表积水淹水灾害，现有如下概率分级： - 高概率：对应10年一遇重现期 - 中概率：对应200年一遇重现期 - 低概率：对应2080年代采用英国气候预测2009（UKCP09）高排放情景下的200年一遇叠加气候变化情景。 地表积水灾害风险图可展示以下内容（如可获取时）： - 淹水范围 - 淹水深度 - 适宜场景下的淹水流速 本次所用气候变化情景基于英国气候预测2009（UKCP09）针对2080年高排放情景的95%分位数预测结果确定。 中、低概率淹水事件的选取标准与苏格兰规划政策中采用的重现期要求保持一致，而高概率淹水事件的选取则参考了近数十年间实际观测到的淹水事件特征。