Surface Water Flood Maps (FRM_FH_SURFACE_WATER_EXTENT_H)

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.本次提供的地表洪水概率等级如下： - 高概率：重现期10年 - 中概率：重现期200年 - 低概率：重现期200年叠加气候变化情景，采用英国气候预测2009（UKCP09）2080年代高排放情景。 本次的地表洪水灾害地图涵盖以下内容（如可获取）： - 淹没范围 - 淹没水深 - 适宜场景下的洪水流速 该气候变化情景基于英国气候预测2009（UKCP09）针对2080年高排放情景下的95%分位数预测结果设定。本次选取中、低概率洪水事件，以匹配苏格兰规划政策中采用的重现期标准；而高概率洪水事件的选取则反映了近数十年来观测到的实际洪水事件特征。