Surface Water Flood Maps (FRM_FH_SURFACE_WATER_DEPTH_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.本次数据集提供以下地表洪水发生概率等级： - 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：结合2080年代英国气候预测2009（UKCP09）高排放情景下的气候变化影响的重现期200年洪水事件 地表洪水危险性地图将展示（如可获取）以下信息：淹没范围、淹没水深，以及适用场景下的洪水流速。 本数据集采用的气候变化情景，基于英国气候预测2009（UKCP09）针对2080年代高排放情景的95%分位数预测结果定义。 中、低概率洪水事件的选取，旨在与苏格兰规划政策中采用的重现期标准保持一致；而高概率洪水事件的选取，则因其能够反映近数十年间实际观测到的洪水事件特征。