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.本次可用的河流洪水概率等级如下： - 高概率等级：10年一遇重现期（return period） - 中概率等级：200年一遇重现期 - 低概率等级：包含1000年一遇重现期的天然洪水，以及基于英国气候预估2009（United Kingdom Climate Projection 2009，UKCP09）2080年代高排放情景的95%分位数预测所定义的气候变化情景下，叠加影响后的200年一遇洪水。 河流灾害地图将展示（如可获取）以下内容：洪水淹没范围、洪水水深，以及适宜场景下的洪水流速。 本次选取中、低概率洪水事件，以匹配苏格兰规划政策中采用的重现期标准；而高概率等级的选取，则是为了反映近数十年来实际观测到的洪水事件特征。