River Flood Maps (FRM_FH_RIVER_DEPTH_L)

These maps have been produced to meet SEPA’s duty to publish flood hazard maps as set out in the Flood Risk Management (Scotland) Act 2009. The maps show where there is a risk of flooding from the sea, from rivers and from surface water.The following probabilities are available for river flooding: - High - 10 year return period - Medium - 200 year return period - Low - 1000 year return period and 200 year return period plus climate change using the UKCP09 high emissions scenario for the 2080s.The river 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.本批地图系为履行苏格兰环境保护局（Scottish Environment Protection Agency, SEPA）根据《2009年洪水风险管理（苏格兰）法案》（Flood Risk Management (Scotland) Act 2009）所规定的发布洪水灾害地图（flood hazard maps）的义务而制作。该类地图展示了受海洋、河流及地表水引发的洪水风险的分布区域。 针对河流洪水，现有以下概率等级的洪水灾害地图： - 高概率：10年一遇重现期 - 中概率：200年一遇重现期 - 低概率：1000年一遇重现期，以及结合2080年代英国气候预估2009（UK Climate Projection 2009, UKCP09）高排放情景下的气候变化影响的200年一遇重现期洪水。 河流洪水灾害地图（如可获取）将展示以下信息： - 洪水淹没范围（flood extent） - 洪水水深（flood depth） - 适用场景下的洪水流速（flood velocities）。 本研究所采用的气候变化情景系基于英国气候预估2009（UKCP09）针对2080年代高排放情景下的95百分位预测结果所设定。中、低概率洪水事件的选取标准与苏格兰规划政策中采用的重现期保持一致，而高概率洪水事件的选取则反映了近数十年来已观测到的实际洪水事件情况。