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.以下为河流洪水发生概率等级划分： - 高概率：10年一遇重现期 - 中等概率：200年一遇重现期 - 低概率：包含1000年一遇重现期，以及基于英国气候预测2009（UKCP09）高排放情景，针对2080年代的200年一遇情景叠加气候变化影响的情况。 如可获取相关数据，本次河流灾害地图将展示以下内容： - 洪水淹没范围 - 洪水水深 - 适宜场景下的洪水流速。 该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%分位数预测结果设定。本次研究选取中等与低概率洪水事件，以契合苏格兰规划政策中采用的重现期标准；高概率洪水等级的选取则为了反映近数十年间实际观测到的典型洪水事件。