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.本次公开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2080年代英国气候预测2009（UKCP09）高排放情景下的气候变化影响 地表洪水危险性地图（可获取时）将展示以下内容： - 洪水淹没范围 - 洪水水深 - 适用场景下的洪水流速 本数据集所采用的气候变化情景，由英国气候预测2009（UKCP09）给出的2080年高排放情景下95%分位数预测结果定义。中、低概率洪水事件的选取参考了《苏格兰规划政策》中规定的重现期标准；高概率洪水事件的选取则基于近数十年间实际观测到的洪水事件，以确保其贴合真实灾情。