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.本次公开的地表洪水（surface water flooding）概率等级及对应设定如下： - 高概率：10年一遇重现期（10 year return period） - 中概率：200年一遇重现期（200 year return period） - 低概率：叠加基于英国气候预测2009（UKCP09）2080年代高排放情景的气候变化影响的200年一遇事件。 所附地表洪水灾害图（如可获取）将展示以下内容： - 洪水淹没范围 - 洪水水深 - 适宜场景下的洪水流速。 本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95%分位数的预测结果设定。 本次选取中、低概率洪水事件，是为与苏格兰规划政策（Scottish Planning Policy）中采用的重现期标准保持一致；而高概率洪水事件的选取，则是为反映近数十年来已观测到的实际洪水事件特征。