Flood Extents and Duration along the Rivers Elbe and Rhine

Raster based flood modelling internally using 'hyd1d', an R package to interpolate 1d water level and gauging data. The package computes flood extent and duration through strategies originally developed for 'INFORM', an 'ArcGIS'-based hydro-ecological modelling framework. It does not provide a full, physical hydraulic modelling algorithm, but a simplified, near real time 'GIS' approach for flood extent and duration modelling. Computationally demanding annual flood durations have been computed already and data products were published by Weber (2022) .

hydflood

The R package hydflood is designed to compute flood extents and durations along the German federal waterways Elbe and Rhine.

Installation

hydflood is available from CRAN. To install it run:

install.packages("hydflood")

To install the latest development version from Github run:

install.packages("devtools")
library(devtools)
devtools::install_github("bafg-bund/hydflood")

Usage

The package hydflood is build around the packages terra and hyd1d.

# load the package
options("hydflood.datadir" = tempdir())
library(hydflood)

# import the raster data and create a raster stack
x <- hydSpatRaster(filename_dem = "data-raw/raster.dem.tif",
                   filename_csa = "data-raw/raster.csa.tif")

# create a temporal sequence
seq <- seq(as.Date("2016-12-01"), as.Date("2016-12-31"), by = "day")

# compute a flood duration
fd <- flood3(x = x, seq = seq)

# and plot it
plot(fd)