Surface Water Flood Maps (FRM_FH_SURFACE_WATER_DEPTH_H)

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.本数据集涵盖以下地表洪水概率等级： - 高概率：10年一遇重现期 - 中概率：200年一遇重现期 - 低概率：基于2080年代英国气候预测2009（UKCP09）高排放情景的200年一遇重现期叠加气候变化影响 本次地表洪水危险性地图涵盖以下内容（如可获取）： - 淹没范围 - 淹没深度 - 适宜场景下的洪水流速 本气候变化情景依据英国2009年气候预测（UKCP09）针对2080年高排放情景的95百分位预测结果设定。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贴合过去数十年间实际观测到的洪水事件特征。