Hawaii Map Series of Projected Shoreline Change with Sea Level Rise for the Ocean Hazards Database
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This database consists of a series of maps showing estimates for the change in position of Hawaii shorelines caused by sea-level rise (SLR) of + 0.5, 1.1, 2.0, and 3.2 feet. Individual maps show perpendicular measurement axes and lines of predicted shoreline positions at mileposts along Hawaii state routes on the islands of Hawaii, Maui, Molokai, Oahu and Kauai previously identified for their vulnerability to the effects of climate change as part of the Statewide Coastal Highways Project Report. Mileposts are identified by Brandes et al. (2019). State of Hawaii Department of Transportation (HDOT) state routes and county street centerline datasets are acquired from HDOT (2017) and HOLIS, C&CH (2017). Projected vegetation lines (long-lasting markers of the shoreline) are determined and reported by the Hawaii Coastal Geology Group (HCGG) in Anderson et al. (2018). Rate of projected erosion is determined as a mean value of rates along the measurement axis (magenta line) from the 2008 vegetation line (blue) to subsequent SLR vegetation lines (red, orange, yellow, and green). Dates for SLR elevations are reported by Anderson et al. (2018) using the IPCC AR5 high-end representative concentration pathway (RCP) 8.5 scenario as 2030 for 0.5 ft of SLR, 2050 for 1.1 ft of SLR, 2075 for 2.0 ft of SLR, and 2100 for 3.2 ft of SLR. Please read ‘Description-Map of Projected Shoreline Change with Sea Level Rise.docx’ for detailed information. References Anderson, T.R., Fletcher, C.H., Barbee, M.M., Romine, B.M., Lemmo, S., and Delevaux, J.M.S. (2018). Modeling multiple sea level rise stresses reveals up to twice the land at risk compared to strictly passive flooding methods. Scientific Reports, 8(1), 1–14. https://doi.org/10.1038/s41598-018-32658-x Brandes, H., Doygun, O., Rossi, C., Francis, O., Yang, L., and Togia, H., (2019) Coastal Road Exposure Susceptibility Index (CRESI) for the State of Hawaii Statewide Coastal Highway Program Report. Department of Civil and Environmental Engineering, University of Hawai'i at Manoa, doi: 10.17632/frr3fsx3j6.2. HDOT (State of Hawaii Department of Transportation). “StateRoutes_SDOT” [shapefile]. Scale Not Given. State Routes. Hawaii Statewide GIS Program. Retrieved from http://files.hawaii.gov/dbedt/op/gis/data/StateAndCountyRoutes.shp.zip (December 2017). HOLIS, C&CH (Honolulu Land Information System, City and County of Honolulu). “Oah_streets” [shapefile]. Scale Not Given. Oahu Street Centerlines. Hawaii Statewide GIS Program. Retrieved from http://geoportal.hawaii.gov/datasets/roads-honolulu-county (December 2017).
本数据集包含一系列地图，展示了由海平面上升（Sea-Level Rise, SLR）分别上升0.5、1.1、2.0及3.2英尺所引发的夏威夷海岸线位置变化估算结果。每张地图均标注了垂直测量轴，以及夏威夷岛、毛伊岛、莫洛凯岛、瓦胡岛和考艾岛沿线州级公路里程碑处的预测海岸线位置线；上述路段此前已在《全州沿海公路项目报告》中被认定为易受气候变化影响的区域。相关里程碑点位由Brandes等人（2019）完成标识。 夏威夷州交通运输部（Hawaii Department of Transportation, HDOT）的州级公路数据集与县级街道中心线数据集，分别获取自HDOT（2017）以及火奴鲁鲁市县檀香山土地信息系统（Honolulu Land Information System, City and County of Honolulu, HOLIS, C&CH, 2017）。预测植被线（海岸线长效标识物）由夏威夷海岸地质工作组（Hawaii Coastal Geology Group, HCGG）于Anderson等人（2018）的研究中确定并发布。 预测侵蚀速率通过沿垂直测量轴（品红色线条）计算得到，即从2008年植被线（蓝色）到后续不同海平面上升情景下的植被线（分别为红色、橙色、黄色与绿色）的速率平均值。Anderson等人（2018）基于政府间气候变化专门委员会第五次评估报告（IPCC AR5）的高端典型浓度路径（Representative Concentration Pathway, RCP）8.5情景，给出了各海平面上升情景对应的年份：0.5英尺海平面上升对应2030年，1.1英尺对应2050年，2.0英尺对应2075年，3.2英尺对应2100年。 详细信息请参阅《海平面上升预测海岸线变化地图说明.docx》。 ### 参考文献 1. Anderson, T.R.、Fletcher, C.H.、Barbee, M.M.、Romine, B.M.、Lemmo, S. 与Delevaux, J.M.S.（2018）。多海平面上升胁迫建模显示，相较于单纯被动淹没方法，受威胁土地面积可达其两倍。《科学报告》，8(1)，1–14。https://doi.org/10.1038/s41598-018-32658-x 2. Brandes, H.、Doygun, O.、Rossi, C.、Francis, O.、Yang, L. 与Togia, H.（2019）。夏威夷州全州沿海公路项目报告之沿海道路暴露易感性指数（Coastal Road Exposure Susceptibility Index, CRESI）。夏威夷大学马诺阿分校土木与环境工程系，doi: 10.17632/frr3fsx3j6.2 3. 夏威夷州交通运输部（HDOT）。"StateRoutes_SDOT"[shapefile]。未标注比例尺。州级公路。夏威夷全州地理信息系统项目。获取自http://files.hawaii.gov/dbedt/op/gis/data/StateAndCountyRoutes.shp.zip（2017年12月） 4. 火奴鲁鲁市县檀香山土地信息系统（HOLIS, C&CH）。"Oah_streets"[shapefile]。未标注比例尺。瓦胡岛街道中心线。夏威夷全州地理信息系统项目。获取自http://geoportal.hawaii.gov/datasets/roads-honolulu-county（2017年12月）
