Surface Water Flood Maps (FRM_FH_SURFACE_WATER_EXTENT_M)

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.本次可获取的地表洪水概率等级如下： - 高概率：10年一遇重现期 - 中概率：200年一遇重现期 - 低概率：200年一遇重现期叠加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涵盖以下内容（如可获取）： - 淹没范围 - 淹没水深 - 适宜场景下的洪水流速 本次设定的气候变化情景，基于英国气候预测2009（UKCP09）针对2080年代高排放情景的95%分位数预测结果确定。中、低概率洪水事件的重现期选取参考了《苏格兰规划政策》中的相关标准，而高概率事件的选取则贴合近数十年来实际观测到的洪水灾情。