DGS, in cooperation with DNREC Delaware Coastal Programs, developed a series of coastal inundation maps corresponding to water surfaces from the mean higher-high water (MHHW) level to 7 feet above MHHW, in 1-foot increments. Development of the bathtub-model inundation maps was based on a high-quality, 1-meter Digital Elevation Model derived from the 2014 state-wide LiDAR acquisition funded jointly by DGS, DNREC, Delaware Department of Transportation and the USGS through Hurricane Sandy Supplemental Relief Funds. The final product of these analyses is a geodatabase containing eight layers (MHHW to MHHW + 7 ft) representing the bare-earth SLR inundation maps and eight layers showing the same regions with an accounting for elevated roadways and bridges. These maps and the updated SLR planning scenarios will help advise long-range planning of infrastructure, facilities, land management, land use, and capital spending.
Documentation describing the mapping methodology is attached below.
This project is supported using Federal funds under award NA13NOS4190093 from the Delaware Department of Natural Resources and Environmental Control (DNREC), Delaware Coastal Programs and the Office for Coastal Management (OCM), National Oceanic and Atmospheric Administration (NOAA), U.S. Department of Commerce. The statements findings, conclusions and recommendations are those of the author(s) and do not necessarily reflect the views of the OCM, NOAA or the U.S. Department of Commerce.