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.本数据集涵盖以下地表积水洪涝（surface water flooding）灾害概率情景： - 高概率情景：对应10年一遇重现期 - 中概率情景：对应200年一遇重现期 - 低概率情景：对应叠加气候变化影响的200年一遇情景，采用英国气候预测2009（United Kingdom Climate Projection 2009, UKCP09）2080年代高排放情景下的预测数据。 地表积水灾害风险图将展示以下内容（如可获取）： - 洪水淹没范围 - 洪水水深 - 适宜场景下的洪水流速 该气候变化情景基于英国气候预测2009（UKCP09）针对2080年高排放情景的95%分位数预测结果设定。中、低概率洪水事件的选取标准与苏格兰规划政策中采用的重现期规范保持一致，而高概率洪水事件的选取则反映了过去数十年间观测到的实际洪涝事件特征。