CRAN/E | spreval

spreval

Evaluation of Sprinkler Irrigation Uniformity and Efficiency

Installation

About

Processing and analysis of field collected or simulated sprinkler system catch data (depths) to characterize irrigation uniformity and efficiency using standard and other measures. Standard measures include the Christiansen coefficient of uniformity (CU) as found in Christiansen, J.E.(1942, ISBN:0138779295, "Irrigation by Sprinkling"); and distribution uniformity (DU), potential efficiency of the low quarter (PELQ), and application efficiency of the low quarter (AELQ) that are implementations of measures of the same notation in Keller, J. and Merriam, J.L. (1978) "Farm Irrigation System Evaluation: A Guide for Management" . spreval::DU.lh is similar to spreval::DU but is the distribution uniformity of the low half instead of low quarter as in DU. spreval::PELQT is a version of spreval::PELQ adapted for traveling systems instead of lateral move or solid-set sprinkler systems. The function spreval::eff is analogous to the method used to compute application efficiency for furrow irrigation presented in Walker, W. and Skogerboe, G.V. (1987,ISBN:0138779295, "Surface Irrigation: Theory and Practice"),that uses piecewise integration of infiltrated depth compared against soil-moisture deficit (SMD), when the argument "target" is set equal to SMD. The other functions contained in the package provide graphical representation of sprinkler system uniformity, and other standard univariate parametric and non-parametric statistical measures as applied to sprinkler system catch depths. A sample data set of field test data spreval::catchcan (catch depths) is provided and is used in examples and vignettes. Agricultural systems emphasized, but this package can be used for landscape irrigation evaluation, and a landscape (turf) vignette is included as an example application.

glgrabow.github.io/spreval/
Bug report File report

Key Metrics

Version 1.1.0
R ≥ 3.5.0
Published 2022-03-23 767 days ago
Needs compilation? no
License GPL-3
CRAN checks spreval results

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Maintainer

Maintainer

Garry Grabow

glgrabow@ncsu.edu

Authors

Garry Grabow

aut / cre / cph

Material

README
NEWS
Reference manual
Package source

Vignettes

Landscape Sprinkler Systems
lateral-move systems
Solid-set Sprinkler Systems
Traveling Systems

macOS

r-release

arm64

r-oldrel

arm64

r-release

x86_64

r-oldrel

x86_64

Windows

r-devel

x86_64

r-release

x86_64

r-oldrel

x86_64

Old Sources

spreval archive

Depends

R ≥ 3.5.0

Imports

timeDate
interp

Suggests

fields
knitr
rmarkdown
plotrix