Surface Water Flood Maps (FRM_FH_SURFACE_WATER_DEPTH_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.本次地表洪水（surface water flooding）的概率等级划分如下： - 高概率：10年一遇重现期 - 中概率：200年一遇重现期 - 低概率：2080年代采用英国2009年气候预测（UKCP09）高排放情景下，200年一遇重现期叠加气候变化影响。 本次地表洪水风险图（surface water hazard maps）将展示（如可获取）以下内容：洪水淹没范围、洪水水深，以及适宜场景下的洪水流速。 本研究采用的气候变化情景由英国2009年气候预测（UKCP09）中2080年高排放情景的95百分位预测结果确定。 中、低概率洪水事件的选取与苏格兰规划政策（Scottish Planning Policy）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反映了过去数十年间已观测到的实际洪涝事件特征。