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.本数据集包含以下河流洪水发生概率分级： - 高概率：10年一遇 - 中等概率：200年一遇 - 低概率：涵盖1000年一遇情景，以及采用英国气候预测2009（UKCP09）高排放情景、针对2080年代的气候变化修正后的200年一遇情景。 河流灾害地图将展示以下内容（如可获取）： - 洪水淹没范围 - 洪水水深 - 适用于相关场景时的洪水流速。 本数据集采用的气候变化情景，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。 中等与低概率洪水事件的重现期选取标准与《苏格兰规划政策》中规定的重现期保持一致，而高概率等级的选取则贴合近数十年来观测到的实际洪水事件特征。