DU: DU of sprinkler irrigation system

In spreval: Evaluation of Sprinkler Irrigation Uniformity and Efficiency

DU of sprinkler irrigation system

Description

Computes DU (distribution uniformity of low quarter) for sprinkler systems using catch can data.

Usage

DU(x)

Arguments

x	numeric array of catch can data. Array may include missing (NA) data. NA values will be removed in function.

Details

mean of lowest quarter of observations divided by overall mean X 100

Value

Distribution Uniformity (of low quarter) in percentage

Author(s)

Garry Grabow [e-mail]

References

Keller, J., and R. D. Bliesner. 2000. Sprinkler and Trickle Irrigation. Caldwell, N.J.: Blackburn Press. ISBN 1-930665-19-9.

See Also

CU,DU.lh

Examples

# data below are volumes caught in ml.  Catch cans must be of
# equal surface area at top when using volume data
x<-c(47,42,45,24,13,26,33,34,27,30,40,44,32,12,12)
xdu<-DU(x)
#round results
durnd<-round(xdu,2)
xdu
durnd

spreval documentation built on March 24, 2022, 1:06 a.m.