Surface Water Flood Maps (FRM_FH_SURFACE_WATER_EXTENT_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.本次地表洪水数据集包含以下概率等级的情景： - 高概率：10年一遇重现期 - 中概率：200年一遇重现期 - 低概率：2080年代采用英国气候预测2009（UKCP09）高排放情景下的200年一遇洪水叠加气候变化影响 地表洪水危险性地图（如可获取）包含以下信息： - 洪水淹没范围 - 洪水水深 - 适用场景下的洪水流速 本研究所用的气候变化情景，基于英国2009年气候预测（UKCP09）中针对2080年高排放情景的95%分位数预测结果设定。 中、低概率洪水情景的选取与苏格兰规划政策中采用的重现期标准保持一致；高概率情景则选取近数十年来实际观测到的典型洪水事件作为参照依据。