Port Phillip Bay Coastal Hazard Assessment

The Port Phillip Bay Coastal Hazard Assessment (the product) is a digital dataset consisting of multiple spatial layer outputs from modelled erosion, inundation and groundwater hazard scenarios.The product is recommended for use at the regional scale around Port Phillip Bay. Application of the data should be guided by the accompanying Port Phillip Bay hazard assessment technical reports (CSIRO 2022, Water Technology 2023, Kennedy 2022) and expert advice. The product is not suitable for individual property scale assessments.The datasets available are as follows. Further detail on technical assumptions for these scenarios are provided in the accompanying technical reports. Additional data sets referenced in the reports are also available on request.Storm tide inundationStorm tide inundation extents for the 1% Annual Exceedance Probability (AEP) for a range of Sea Level Rise (SLR) scenarios (0m, 0.2m, 0.5m, 0.8m, 1.1m):- PPBCHA_INUNDATION_EXTENT_1AEP_00SLR- PPBCHA_INUNDATION_EXTENT_1AEP_02SLR- PPBCHA_INUNDATION_EXTENT_1AEP_05SLR- PPBCHA_INUNDATION_EXTENT_1AEP_08SLR- PPBCHA_INUNDATION_EXTENT_1AEP_11SLR- PPBCHA_INUNDATION_EXTENT_1AEP_14SLR- PPBCH A_INUNDATION_EXTENT_1AEP_00SLR_WITHRAINFALL- PPBCHA_INUNDATION_EXTENT_1AEP_02SLR_WITHRAINFALL- PPBCHA_INUNDATION_EXTENT_1AEP_05SLR_WITHRAINFALL- PPBCHA_INUNDATION_EXTENT_1AEP_08SLR_WITHRAINFALL- PPBCHA_INUNDATION_EXTENT_1AEP_11SLR_WITHRAINFALL- PPBCHA_INUNDATION_EXTENT_1AEP_14SLR_WITHRAINFALLStorm tide inundation extents for each SLR scenario are presented as a combined vector layer that incorporates the modelled 95th, 50th, and 5th percentiles.ErosionErosion extents for the 1%AEP for a range of Sea Level Rise (SLR) scenarios (0m, 0.2m, 0.5m, 0.8m, 1.1m).- PPBCHA_EROSION_EXTENT_1AEP_2010_00SLR- PPBCHA_EROSION_EXTENT_1AEP_2040_02SLR- PPBCHA_EROSION_EXTENT_1AEP_2070_05SLR- PPBCHA_EROSION_EXTENT_1AEP_2100_08SLR- PPBCHA_EROSION_EXTENT_1AEP_2100_11SLR- PPBCHA_EROSION_EXTENT_1AEP_2100_14SLRErosion hazard extents are the modelled 95th percentile. Sea level of 0m as of 2010.GroundwaterGroundwater extents indicating where the hazard is shallow (within 0 to 2m below land surface) for a range of Sea Level Rise (SLR) scenarios (0m, 0.2m, 0.5m, 0.8m):- PPBCHA_GROUNDWATER_EXTENT_SHALLOW_00SLR- PPBCHA_GROUNDWATER_EXTENT_SHALLOW_02SLR- PPBCHA_GROUNDWATER_EXTENT_SHALLOW_05SLR- PPBCHA_GROUNDWATER_EXTENT_SHALLOW_08SLR- PPBCHA_GROUNDWATER_EXTENT_SHALLOW_11SLR- PPBCHA_GROUNDWATER_EXTENT_SHALLOW_14SLRShallow groundwater extent layer is derived from the groundwater depth raster.Report Citations:CSIRO - McInnes, K.L., O’Grady, J.O., Prakash, M., Dahlhaus, P., Rosengren, N.J., Hoeke, R.K., Lauchlan Arrowsmith, C., Hernaman, V., Cohen, R., Seers, B., Chen, Y., Walters, D., Couto, P., Trenham, C., Forbes-Smith, N. Gregory, R., Hemer, M. and Power, R. (2022) Port Phillip Bay Coastal Hazard Assessment: Final Report. Report to Department of Environment, Land, Water and Planning. 236 pages + 11 Appendices.Water Technology (2023) Erosion Hazard Summary Report, Port Phillip Bay Coastal Erosion Hazards, Report to Department of Energy, Environment and Climate ActionKennedy, D. M. (2022), Tertiary Coastal Compartments in Port Phillip Bay: Review, Definition and Methodology, Report to Department of Energy, Environment and Climate Action. School of Geography, Earth and Atmospheric Sciences, The University of Melbourne.

菲利普港湾海岸灾害评估数据集（以下简称本数据集）为数字化数据集，包含基于侵蚀、淹没及地下水灾害情景模拟生成的多空间图层（spatial layer）输出成果。本数据集推荐用于菲利普港湾周边区域尺度的相关工作，其应用需遵循配套的《菲利普港湾灾害评估技术报告》（CSIRO 2022、Water Technology 2023、Kennedy 2022）及专家建议。本数据集不适用于单宗物业尺度的灾害评估工作。

本次公开的数据集如下。关于上述灾害情景的技术假设细节，可查阅配套技术报告。报告中引用的其他数据集亦可根据申请获取。

### 风暴潮淹没
针对一系列海平面上升（Sea Level Rise, SLR）情景下的1%年超越概率（Annual Exceedance Probability, AEP）风暴潮淹没范围：
- PPBCHA_INUNDATION_EXTENT_1AEP_00SLR
- PPBCHA_INUNDATION_EXTENT_1AEP_02SLR
- PPBCHA_INUNDATION_EXTENT_1AEP_05SLR
- PPBCHA_INUNDATION_EXTENT_1AEP_08SLR
- PPBCHA_INUNDATION_EXTENT_1AEP_11SLR
- PPBCHA_INUNDATION_EXTENT_1AEP_14SLR
- PPBCHA_INUNDATION_EXTENT_1AEP_00SLR_WITHRAINFALL
- PPBCHA_INUNDATION_EXTENT_1AEP_02SLR_WITHRAINFALL
- PPBCHA_INUNDATION_EXTENT_1AEP_05SLR_WITHRAINFALL
- PPBCHA_INUNDATION_EXTENT_1AEP_08SLR_WITHRAINFALL
- PPBCHA_INUNDATION_EXTENT_1AEP_11SLR_WITHRAINFALL
- PPBCHA_INUNDATION_EXTENT_1AEP_14SLR_WITHRAINFALL

各海平面上升情景下的风暴潮淹没范围以合并矢量图层（vector layer）形式呈现，包含模拟得到的95分位、50分位及5分位结果。

### 侵蚀
针对不同基准年与海平面上升（SLR）幅度的1%年超越概率（AEP）侵蚀范围：
- PPBCHA_EROSION_EXTENT_1AEP_2010_00SLR
- PPBCHA_EROSION_EXTENT_1AEP_2040_02SLR
- PPBCHA_EROSION_EXTENT_1AEP_2070_05SLR
- PPBCHA_EROSION_EXTENT_1AEP_2100_08SLR
- PPBCHA_EROSION_EXTENT_1AEP_2100_11SLR
- PPBCHA_EROSION_EXTENT_1AEP_2100_14SLR

侵蚀灾害范围为模拟得到的95分位结果，基准年为2010年，海平面上升幅度为0米。

### 地下水
针对一系列海平面上升（SLR）情景，标注灾害潜势较浅（距地表0至2米范围内）的地下水分布范围：
- PPBCHA_GROUNDWATER_EXTENT_SHALLOW_00SLR
- PPBCHA_GROUNDWATER_EXTENT_SHALLOW_02SLR
- PPBCHA_GROUNDWATER_EXTENT_SHALLOW_05SLR
- PPBCHA_GROUNDWATER_EXTENT_SHALLOW_08SLR
- PPBCHA_GROUNDWATER_EXTENT_SHALLOW_11SLR
- PPBCHA_GROUNDWATER_EXTENT_SHALLOW_14SLR

浅层地下水分布图层由地下水深度栅格数据（raster）推导生成。

### 参考文献
1. 澳大利亚联邦科学与工业研究组织（CSIRO）：《菲利普港湾海岸灾害评估最终报告》，提交给环境、土地、水利与规划部，2022年，全文236页并附带11个附录，作者包含McInnes, K.L.、O’Grady, J.O.、Prakash, M.等。
2. Water Technology：《菲利普港湾海岸侵蚀灾害摘要报告》，提交给能源、环境与气候行动部，2023年。
3. Kennedy, D. M.：《菲利普港湾第三级海岸分区：回顾、界定与方法》，提交给能源、环境与气候行动部，墨尔本大学地理、地球与大气科学学院，2022年。