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.本次数据集涵盖以下等级的地表漫溢洪水（surface water flooding）概率情景： - 高概率情景：重现期10年的洪水事件 - 中概率情景：重现期200年的洪水事件 - 低概率情景：叠加2080年代英国2009年气候预估（UKCP09）高排放情景下气候变化影响的200年一遇洪水事件。 地表漫溢洪水灾害风险图可展示以下内容（如可获取）： - 淹没范围 - 淹没水深 - 适宜场景下的洪水流速。 本数据集采用的气候变化情景由英国2009年气候预估（UKCP09）针对2080年高排放情景下的95%分位数预测结果定义。本次选取中、低概率洪水事件，旨在与苏格兰规划政策中采用的重现期标准保持一致；而高概率情景的选取，则因该情景能够反映近数十年来实际观测到的洪水事件特征。