Factors Affecting the Results for Lower Quarter Distribution Uniformity from Catch Can Tests

摘要

One of the current Turf and Landscape Irrigation Best Management Practices published by the Irrigation Association states that lower-quarter distribution uniformity (DULQ) should be a minimum of 55% for spray heads and 70% for rotor heads. As water purveyors begin to adopt the BMPs for use in their local jurisdictions and perhaps require catch-can field tests to verify compliance, there appears to be a need to provide guidelines for performing field evaluations. This paper will look at several factors that affect lower-quarter distribution uniformity from catch-can tests results including wind speed, operating pressure and placement of the catch-cans in the test area.