Surface Water Flood Maps (FRM_FH_SURFACE_WATER_EXTENT_H)

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.以下为地表洪水（surface water flooding）的概率分级及对应情景： - 高概率：10年一遇重现期（10 year return period） - 中概率：200年一遇重现期（200 year return period） - 低概率：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的200年一遇重现期场景。 地表洪水灾害图将展示以下内容（如可获取）： - 洪水淹没范围 - 洪水水深 - 适用场景下的洪水流速 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%百分位预测结果设定。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，而高概率事件的选取则贴合近数十年来观测到的实际洪水事件特征。