River Flood Maps (FRM_FH_RIVER_EXTENT_M_CC)

The following probabilities are available for river flooding: - High - 10 year return period - Medium - 200 year return period - Low - 1000 year return period and 200 year return period plus climate change using the UKCP09 high emissions scenario for the 2080s.The river 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.本次提供的河道洪水概率等级如下： - 高概率：10年一遇重现期（return period） - 中概率：200年一遇重现期 - 低概率：包含1000年一遇重现期，以及2080年代采用英国2009年气候预测（UKCP09）高排放情景下，叠加气候变化影响的200年一遇重现期洪水情景。 河道灾害地图将展示（如可获取时）： - 洪水淹没范围 - 洪水水深 - 适宜场景下的洪水流速 本气候变化情景基于英国2009年气候预测（UKCP09）针对2080年高排放情景的95%分位数预测结果设定。中等及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，而高概率洪水事件的选取则反映了近数十年间实际观测到的洪水事件特征。