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windAC (version 1.2.10)

Area Correction Methods

Description

Post-construction fatality monitoring studies at wind facilities are based on data from searches for bird and bat carcasses in plots beneath turbines. Bird and bat carcasses can fall outside of the search plot. Bird and bat carcasses from wind turbines often fall outside of the searched area. To compensate, area correction (AC) estimations are calculated to estimate the percentage of fatalities that fall within the searched area versus those that fall outside of it. This package provides two likelihood based methods and one physics based method (Hull and Muir (2010) , Huso and Dalthorp (2014) ) to estimate the carcass fall distribution. There are also functions for calculating the proportion of area searched within one unit annuli, log logistic distribution functions, and truncated distribution functions.

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Version

Install

install.packages('windAC')

Monthly Downloads

185

Version

1.2.10

License

GNU General Public License

Maintainer

Daniel Riser-Espinoza

Last Published

March 22nd, 2023

Functions in windAC (1.2.10)

truncatedDistribution

Truncated Distributions
hallingstad

Data sets from Hallingstad et al. 2018
hullMuirMaxDistance

Calculate the Hull and Muir (2010) maximum distance
turbineSpatial

Data sets of spatial area searched at a wind farm
hullMuirAreaCorrection

Calculate an area correction based on the Hull and Muir (2010) maximum distance and a triangular distribution as proposed by Huso and Dalthorp (2014).
print.windAC

Print windAC object
secondDerivative

secondDerivative
getStartValue

Calculate the start values to be passed to the optimizer.
proportionAreaSearched

Proportion of area searched example data set
triangleProb

Calculate probabilities from a triangle distribution based on Hull and Muir (2010) maximum distance as proposed by Huso and Dalthorp (2014).
estTWL

Truncated Weighted Likelihood Estimation
weightFun

weight function
estWD

Weighted Distribution Estimation
windAC

A package for calculating area correction values for fatality estimation at wind farms.
geometricRoadPadPropSearchTable

Calculate the areas of intersection of a series of nested annuli with an idealized access road and turbine pad.
getDistributionFunction

Getting distribution functions
circleBoxInt

Integration of the intersection of a rectangle and a circle
carcassDistance

Carcass distance example data set
LogLogistic

Log-Logistic Distribution
getDistributionSummary

Summary statistics from the fitted distribution
calcAC

Calculate the area correction value(s) with confidence intervals
geometricRectanglePropSearchTable

Create proportion of area searched table for a rectangular full plot
getDistanceProbability

Calculate probabilities within one unit increments.
getProportionAreaSearched

Create proportion of area searched table from spatial data