TCHazaRds (version 1.1.2)

TCHazaRdsWindFields: Compute the Wind and Pressure Spatial Hazards Field Associated with TC track.

Description

Compute the Wind and Pressure Spatial Hazards Field Associated with TC track.

Usage

TCHazaRdsWindFields(
  outdate = NULL,
  GEO_land,
  TC,
  paramsTable,
  outfile = NULL,
  overwrite = FALSE,
  returnWaves = FALSE
)

Value

SpatRasterDataset with the following attributes.

abbreviated attribute	description	units
P	Atmospheric pressure	hPa
Uw	Meridional wind speed	m/s
Vw	Zonal wind speed	m/s
Sw	Wind speed	m/s
Dw	The direction from which wind originates	deg clockwise from true north
Hs0	Deep water significant wave height	m
Tp0	Deep water Peak wave period	s
Dp0	The peak direction in which wave are heading	deg clockwise from true north.

Arguments

outdate

array of POSITx date times to linearly interpolate TC track

GEO_land

SpatVector or dataframe hazard geometry generated with land_geometry

TC

SpatVector of Tropical cyclone track parameters for a single time step

paramsTable

Global parameters to compute TC Hazards

outfile

character. Output netcdf filename

overwrite

TRUE/FALSE, option to overwrite outfile

returnWaves

Return ocean wave parameters (default = FALSE)

Examples

require(terra)
dem <- rast(system.file("extdata/DEMs/YASI_dem.tif", package="TCHazaRds"))
land <- dem; land[land > 0] = 0
inland_proximity = distance(land,target = 0)
GEO_land = land_geometry(dem,inland_proximity)

TCi = vect(cbind(c(154,154),c(-26.1,-26)),"lines",crs="epsg:4283") #track line segment
TCi$PRES = 950
TCi$RMAX = 40
TCi$VMAX = 60
TCi$B = 1.4
TCi$ISO_TIME = "2022-10-04 20:00:00"
TCi$LON = geom(TCi)[1,3]
TCi$LAT = geom(TCi)[1,4]
TCi$STORM_SPD = perim(TCi)/(3*3600) #m/s
TCi$thetaFm = 90-returnBearing(TCi)
#OR
TC <- vect(system.file("extdata/YASI/YASI.shp", package="TCHazaRds"))
TC$PRES <- TC$BOM_PRES
plot(dem);lines(TC,lwd = 4,col=2)

paramsTable = read.csv(system.file("extdata/tuningParams/defult_params.csv",package = "TCHazaRds"))
#calculate the wind hazard

outdate = seq(strptime(TC$ISO_TIME[44],"%Y-%m-%d %H:%M:%S",tz="UTC"),
              strptime(TC$ISO_TIME[46],"%Y-%m-%d %H:%M:%S",tz="UTC"),
              3600*3)
HAZi = TCHazaRdsWindFields(outdate=outdate,GEO_land=GEO_land,TC=TC,paramsTable=paramsTable)
plot(min(HAZi$Pr))