Surface Water Flood Maps (FRM_FH_SURFACE_WATER_DEPTH_L)

The following probabilities are available for surface water flooding: - High - 10 year return period - Medium - 200 year return period - Low - 200 year return period plus climate change using the UKCP09 high emissions scenario for the 2080s.The surface water 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.本次可获取的地表水泛滥（surface water flooding）概率等级如下： - 高概率：10年一遇重现期（return period） - 中概率：200年一遇重现期 - 低概率：以200年一遇重现期为基础，叠加2080年代英国气候预测2009（UKCP09）高排放情景下的气候变化影响 地表水灾害风险图（若可获取）包含以下要素： - 洪水淹没范围 - 洪水水深 - 适用场景下的洪水流速 本次采用的气候变化情景，基于英国气候预测2009（UKCP09）针对2080年高排放情景下的95%分位数预测值制定。中、低概率洪水事件的选取标准，与苏格兰规划政策（Scottish Planning Policy）中采用的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。