Surface Water Flood Maps (FRM_FH_SURFACE_WATER_EXTENT_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.本次数据集涵盖地表洪水（surface water flooding）的以下概率等级： - 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：叠加2080年代英国气候预测2009（UKCP09）高排放情景下气候变化影响的200年一遇洪水事件 地表洪水灾害风险图可展示以下内容（如可获取）： - 洪水淹没范围 - 洪水水深 - 适用于相应场景的洪水流速 本研究所用气候变化情景，基于英国气候预测2009（UKCP09）针对2080年高排放情景的95百分位预测结果设定。本次研究选取中、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，则旨在反映过去数十年间实际观测到的洪水事件特征。