***Enabling dynamic modelling of coastal flooding by defining storm tide hydrographs***
Authors: Dullaart, J.C.M., Muis, S., de Moel, H., Ward, P.J., Eilander, D. & Aerts, J.C.J.H.
Institute for Environmental Studies, Faculty of Science, Vrije Universiteit Amsterdam

Corresponding Author: Dullaart, J.C.M.

Contact Information: job.dullaart@vu.nl

Vrije Universiteit Amsterdam - Institute for Environmental Studies
De Boelelaan 1111
1081 HV Amsterdam
The Netherlands

***General Introduction***
In this study we develop a method to generate hydrographs called HGRAPHER, and we provide a 15 global dataset of storm tide hydrographs based on time series of storm surges and tides derived from the Global Tide and Surge Model (GTSM) forced with the ERA5 reanalysis wind and pressure fields. These hydrographs represent the typical shape of an extreme storm tide at a certain location along the 20 global coastline. We test the sensitivity of the HGRAPHER method with respect to two main assumptions that determine the shape of the hydrograph, namely the surge event sampling threshold and coincidence in the time of the surge and tide maxima. The hydrograph dataset can be used to move 25 away from planar inundation modelling techniques towards dynamic inundation modelling techniques across different spatial scales. The hydrographs in this dataset corresponds to the 1-in-100-year storm tide level.

***Description of the data in this data set***
The data included in this netcdf data set has been organised per output location (coordinates) of the hydrodynamic model and includes the following:
- Coordinates
	- station_x_coordinate 	= longitude
	- station_y_coordinate 	= latitude
	- time				 	= time

- Data variables:
	- station_id 			= name of output location in the hydrodynamic global tide and surge model (GTSM)
	- hydrograph_average_tide_signal = RP100 storm tide hydrograph based on average high tide signal
	- hydrograph_spring_tide_signal  = RP100 storm tide hydrograph based on average spring tide signal

- Attributes
	- title					= COAST-HG (COastal dAtaset of Storm Tide HydroGraphs)
	- summary				= This dataset contains hydrographs of storm tide levels with a 1-in-100 year return period. Storm tide is defined as the sum of the storm surge and tidal levels. There are two time series available per output location. One that represents the average tide, and a second one that represents spring tide conditions.
	- source				= CoDEC (Muis et al., 2020) / COAST-RP (Dullaart et al., 2021)
	- geospatial_lat_min	= -90
	- geospatial_lat_max	= 90
	- geospatial_lat_units	= degrees_north
	- geospatial_lon_min	= -180
	- geospatial_lon_max	= 180
	- geospatial_lon_units	= degrees_east
	- geospatial_vertical_units = m
	- geospatial_vertical_positive = up
	- institution			= IVM - VU Amsterdam
	- creator_email			= job.dullaart@vu.nl
	- date_created			= Wed Oct 5 10:29:44 2022
