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.本次公开的地表洪涝（surface water flooding）灾害概率等级如下： - 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：200年一遇情景叠加2080年代英国气候预测2009（UKCP09）高排放情景下的气候变化影响 本次地表洪涝灾害风险图（如可获取）包含以下内容： - 淹没范围 - 淹没水深 - 适用场景下的淹没流速 本数据集采用的气候变化情景，基于英国2009年气候预测（UKCP09）针对2080年高排放情景下的95%分位数预测结果制定。 本次选取中、低概率洪涝情景，旨在与苏格兰规划政策（Scottish Planning Policy）中采用的重现期标准保持一致；而高概率情景的选取，则因其可反映近数十年来实际观测到的洪涝事件特征。