Surface Water Flood Maps (FRM_FH_SURFACE_WATER_DEPTH_M)

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.本次公开的地表积水（surface water flooding）概率分级如下： - 高概率：重现期为10年的洪水事件 - 中概率：重现期为200年的洪水事件 - 低概率：基于英国气候预测2009（UKCP09）高排放情景，针对2080年代的200年重现期事件叠加气候变化影响的洪水事件。 地表积水灾害地图将展示（如可获取）以下内容： - 淹没范围 - 淹没水深 - 适宜场景下的洪水流速 本研究采用的气候变化情景，由英国气候预测2009（UKCP09）针对2080年代高排放情景下的95%分位数预测值确定。 本次选取中、低概率洪水事件，以匹配苏格兰规划政策（Scottish Planning Policy）中采用的重现期标准；高概率事件的选取则贴合近几十年来实际观测到的洪水事件特征。