Surface Water Flood Maps (FRM_FH_SURFACE_WATER_DEPTH_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.本次数据集涵盖以下不同概率等级的地表洪水（surface water flooding）情景： - 高概率：10年一遇重现期 - 中概率：200年一遇重现期 - 低概率：基于2080年代英国2009年气候预测（UKCP09）高排放情景的气候变化修正后的200年一遇事件 地表洪水风险图（若可获取）将展示以下内容： - 洪水淹没范围 - 洪水水深 - 适宜场景下的洪水流速 本数据集采用的气候变化情景，由英国2009年气候预测（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标准与苏格兰规划政策（Scottish Planning Policy）中采用的重现期规范保持一致，而高概率事件的选取则贴合近数十年间实际观测到的洪水事件特征。