River Flood Maps (FRM_FH_RIVER_EXTENT_M)

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.本数据集提供以下河流洪水概率等级： - 高概率：10年一遇重现期 - 中概率：200年一遇重现期 - 低概率：1000年一遇重现期 此外，针对2080年代时段，基于英国气候预测2009（UKCP09）高排放情景，还包含叠加气候变化影响的200年一遇洪水概率场景。 该河流灾害地图（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源自英国气候预测2009（UKCP09）针对2080年高排放情景的95%分位数预测结果。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，而高概率洪水等级的选取则反映了近数十年间实际观测到的洪水事件特征。