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（SEPA）依据《2009年苏格兰洪水风险管理法》（Flood Risk Management (Scotland) Act 2009）所规定的发布洪水危险地图（flood hazard map）的法定义务而制作。本地图展示了海洋、河流及地表径流引发洪水的风险区域。 针对河流洪水，现有以下概率分级的洪水危险数据： - 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，以及叠加2080年代英国气候预测2009（UKCP09）高排放情景下气候变化影响的200年一遇洪水情景。 河流危险地图将展示（如可获取）： - 洪水淹没范围（flood extent） - 洪水水深（flood depth） - 适宜工况下的洪水流速（flood velocities）。 本次采用的气候变化情景系基于英国气候预测2009（UKCP09）针对2080年高排放情景下的95%分位数预测结果制定。中、低概率洪水事件的选取与苏格兰规划政策中采用的重现期标准保持一致，而高概率事件的选取则参考了近数十年来已发生的实测洪水事件。