1% AEP Flood Depths with Recent Development Area

The 1% AEP flood depth map represents depths from a flooding and storm tide event with 1% 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 1% 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.

1%年超越概率（1% AEP）洪水深度图展示了每年发生或超越概率为1%的洪水与风暴潮事件的水深。由于缺少流速信息，该洪水深度图无法准确反映特定点位的洪水危险性。融合了水深与流速特征的洪水危险性，可通过1% AEP洪水危险性图查看。
用于绘制该图的地面高程数据包括：
- 以2014年激光雷达（LiDAR）作为基础地形；
- 覆盖城区的2022年激光雷达数据；
- 覆盖2014至2022年间城区外土方工程区域的2022年激光雷达数据。
近期开发区标注了自基础制图完成后，因开发建设导致洪水信息发生变化的区域。该图层中，近期开发区以-99数值进行标识。