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.本次可获取的地表积水洪涝概率等级如下： - 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。 地表积水灾害地图将展示（如可获取）以下内容： - 洪水淹没范围 - 洪水水深 - 适宜场景下的洪水流速。 本次气候变化情景依据英国气候预测2009（UKCP09）针对2080年高排放情景的95%分位数预测结果设定。 本次研究选取中、低概率洪涝事件，以匹配《苏格兰规划政策》中采用的重现期标准；高概率事件则因可反映近数十年间实际观测到的洪涝灾害特征而被选用。