make.windfarms {DEPONS2R}

Make wind farm construction scenario

Description

Produce a hypothetical wind farm construction scenario, specifying the position and timing of individual piling events, as well as the sound source level. All wind farms are assumed to consist of the same number of turbines, laid out in a rectangular grid. The start and end tick (i.e. the number of half-hour intervals since simulation start) is generated based on provided values for the time it required for each piling and the time between piling events.

Usage

make.windfarms(
  area.file,
  area.def,
  n.wf,
  n.turb,
  turb.dist,
  min.wf.dist,
  impact,
  constr.start,
  constr.end,
  constr.time,
  constr.break,
  iterate = 10000,
  verbose = FALSE,
  wf.coords = "random"
)

Arguments

area.file

Name of the raster file specifying where the wind farms should be constructed.

area.def

Value in area.file for the areas were wind farms can be located

n.wf

Number of wind farms to construct

n.turb

Total number of turbines to construct

turb.dist

Distance between turbines within a wind farm (meters)

min.wf.dist

Minimum distance between wind farms (meters)

impact

Sound source level (dB); sound emitted from turbines during construction, i.e. from tickStart to tickEnd (including both start and end)

constr.start

The tick at which construction of the first turbine starts.

constr.end

The tick at which construction of the very last turbine in the last wind farm ends.

constr.time

The time it takes to construct a single wind turbine (number of ticks).

constr.break

Break between individual pilings within a wind farm, counted in number of half-hour 'ticks'.

iterate

Number of times to try finding a spot for a new wind farm that is sufficiently far from the nearest neighbouring wind farm (>min.wf.dist). The number also defines the number of random positions to search through.

verbose

Logical; whether messages should be printed to console.

wf.coords

Possible location of the south-western corner of the wind farms. Defaults to the text "random", but can also be a data frame with coordinates in the columns x and y.

Value

data.frame specifying the position of each turbine in a wind farm, along with the start time and end time for pile driving of the turbine foundation and the sound source level during pile driving. Can be exported as a text file and used for controlling DEPONS simulations.

Note

The parameters constr.start, constr.end, constr.time, and constr.break are truncated to nearest integer value. Construction of wind farms starts in WF001 at tick constr.start. Each turbine foundation is piled over a period of constr.time, followed by a noise-free period of constr.break. Several pile driving operations may take place at the same time, to ensure that the last piling ends before constr.end.