River Flood Maps (FRM_FH_RIVER_EXTENT_H)

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.本次数据集涵盖以下河流洪水发生概率等级： - 高概率：10年一遇洪水 - 中等概率：200年一遇洪水 - 低概率：包含1000年一遇洪水，以及采用英国气候计划2009（UKCP09）2080年代高排放情景下的气候变化修正后的200年一遇洪水。 本次发布的河流灾害风险图（如有可用数据）涵盖以下内容： - 洪水淹没范围 - 洪水水深 - 适宜评估场景下的洪水流速 本研究采用的气候变化情景，基于英国气候计划2009（UKCP09）针对2080年高排放情景的95%分位数预测结果确定。中等及低概率洪水事件的选取标准，与苏格兰规划政策中采用的洪水重现期规范保持一致；而高概率洪水事件的选取，则反映了近数十年来实际观测到的洪水事件特征。