overlap: Superimpose catch can data

In spreval: Evaluation of Sprinkler Irrigation Uniformity and Efficiency

Superimpose catch can data

Description

Simulate overlap from adjacent laterals using data from one lateral.

Usage

overlap(sl,sc,lcdata,rcdata)

Arguments

sl	lateral spacing.
sc	catch can spacing perpendicular to lateral.
lcdata	data from cans left of lateral; order is proximal to distal of lateral.
rcdata	data from cans right of lateral; order as in lcdata.

Details

Superimposes and sums one row of catch can data as if adjacent lateral had same catch pattern. Repeat function for multiple rows of catch cans between laterals, to normally include all rows of cans between two sprinklers.

Value

A named list with the following items:

sum.left	numeric array of summed overlap catch can data between tested lateral and simulated lateral to the left.
sum.right	numeric array of summed overlap catch can data between tested lateral and simulated lateral to the right.

Note

both items of list will have same summed values but in inversely ordered. Only can data receiving water need to be entered into lcdata and rcdata. The function will automatically produce "phantom cans" to fill between adjacent laterals if not entered and set catch to 0.

Author(s)

Garry Grabow [e-mail]

Examples

sl<-60 #lateral spacing. Units are feet
sc<-10 #catch cans spacing along single "row". Units are feet
#note that neither lcdata or rcdata have 6 cans. function will generate "0" cans.
lcdata<-c(0.28,0.24,0.21,0.10)
rcdata<-c(0.23,0.21,0.3)
#generate summed catch for one row at 60 foot lateral spacing
spacing.60<-overlap(sl,sc,lcdata,rcdata)
spacing.60
#now generate summed catch assuming a 50 foot lateral spacing
sl<-50
spacing.50<-overlap(sl,sc,lcdata,rcdata)
spacing.50
  

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