Formulas for Irrigation Audit

AC    =      Average Catch   

=      (1c + 2c + 3c + 4c + 5c + 6c + 7c + 8c) ^∙/. 8

ALC   =      Average Low Catch

=      (whichever two collectors are lowest ie 1,2)    = (1c + 2c) ^∙/. 2

AD    =      Average Deviation

=      ( |1c – AC| + |2c – AC| + |3c – AC| + |4c – AC| + |5c – AC| + è

è |6c – AC| + |7c – AC| + |8c – AC|) ^∙/. 8

DU    =      Distribution Uniformity

=      ALC ^∙/. AC

CU    =      Coefficient of Uniformity

=      (1 – AD) ^∙/. AC

SC     =      Scheduling Coefficient

=      AC ^∙/. ALC