High Water Mark Data
Historical storm event data were aggregated from tide gage observations, published reports, local agency records, and other sources. Observed HWM and storm tide data has been calibrated across the spatial dimensions.
Post-event field observations of HWMs noting the possible influence of waves on the water surface elevations, on georeferencing methods, and other characteristics are added to each record, as needed.
Below are two methods for browsing Delaware HWM data: search by event or station. Sometimes it is important to see the impact of an event on an area, while on other occasions, it is helpful to see how a station has changed over time.
View Data By Event
Search features include:
- Event summary metadata
- Interactive map showing all records for that event
- Filtered searching
View Data By Station
Search features include:
- Station metadata
- Time slider
- Filtered searching
- Export data to csv, pdf, etc.
Questions about the data?
If you have questions about the data archived in this database, please feel free to contact us.
Partners
The Delaware HWM Database project is a collaborative effort between the Delaware Geological Survey (DGS), the Delaware Environmental Observing System (DEOS), and the Delaware Environmental Monitoring & Analysis Center (DEMAC).
This project was funded using Federal funds under awards NA14OAR4170087 from the Delaware Sea Grant Program through the National Sea Grant College Program, National Oceanic and Atmospheric Administration (NOAA), U.S. Department of Commerce.
