Derivation of chart from Texas A&M study

Chart showing relative watering

 

The chart below was above was derived from Table 12 shown below in the Texas A&M "Evaluation of Smart Irrigation Controllers." The formula used was (Irrigation applied-TexasET Rec.)/Texas ET Rec. The resulting number was converted to a percent. The total irrigated water was the most meaningful because in real life, the homeowner or contractor would move water from one valve to another to adjust for the needs of the landscape.

The A-H are their nomenclature for the the manufacturers which were entered directly into the chart above.

Chart from Texas A&M study.