0.05% AEP Flood Depths with Recent Development Area

The 0.05% AEP flood depth map represents depths from a flooding and storm tide event with 0.05% chance of occurring or being exceeded each year. The flood depth map may not provide an accurate guide of the flood hazard at a given location, due to the absence of velocity information. Flood hazard, which incorporates both depth and velocity characteristics, can be viewed in the 0.05% AEP Flood Hazard map. Ground levels used to inform the mapping include: - 2014 LiDAR as the base terrain; - 2022 LiDAR covering urban areas; and - 2022 LiDAR covering earthworks which occurred between 2014 and 2022 outside of urban areas. Recent Development Areas highlight locations where flood information is likely to have changed due to development that has occurred since the underlying mapping was prepared. Recent Development Areas are represented by a -99 value in this layer.0.05%年超越概率（AEP，Annual Exceedance Probability）洪水淹没深度图，表征每年发生或被超越概率为0.05%的洪水与风暴潮事件对应的淹没水深。 由于未包含流速信息，该洪水淹没深度图无法精准反映特定地点的洪水灾害风险。 融合水深与流速双重特征的洪水灾害风险，可通过0.05% AEP洪水灾害风险图进行查看。 用于生成该地图的地面高程数据包括： - 以2014年激光雷达（LiDAR）作为基础地形数据源； - 覆盖城区范围的2022年激光雷达（LiDAR）数据； - 覆盖2014至2022年间城区外土方工程区域的2022年激光雷达（LiDAR）数据。 近期开发区域指自基础制图工作完成后，因后续开发建设导致洪水相关信息发生显著变化的区域，该图层中此类区域以-99值进行标识。