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.本次公开的地表洪水（surface water flooding）概率等级如下： - 高概率：10年一遇洪水重现期（return period） - 中概率：200年一遇洪水重现期 - 低概率：叠加2080年代英国气候预测2009（UKCP09，United Kingdom Climate Projection 2009）高排放情景下的气候变化影响的200年一遇重现期事件 本次地表洪水危险性地图（surface water hazard map）可展示（如可获取的情况下）以下内容： - 淹没范围 - 淹没水深 - 适宜场景下的洪水流速 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年代高排放情景下的95%分位数预测结果设定。 本次选取中、低概率洪水事件，以契合苏格兰规划政策中采用的洪水重现期标准；而高概率洪水事件的选取，则基于近数十年间已观测到的实际洪水事件特征。